12924 lines
600 KiB
Plaintext
12924 lines
600 KiB
Plaintext
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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Msg#: 1846 Date: 10-05-93 12:54
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From: Richard Quick
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To: David Tiefenbrunn
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Subj: 10KVA Tesla Coil
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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I get some good results, not many people can hold a candle to it.
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Need to move into a warehouse with some headroom and more power.
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A dedicated substation would be nice... RQ
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DT> Where are you running this thing now, out of curiosity?
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DT> Don't the neighbors complain about the RFI?
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DT> Do you have any pictures or .GIF files of this unit in
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DT> action?
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I run either in the garage for low power tests, or set up outside
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in the back driveway for the real high powered stuff. I have had
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no RFI complaints, but have had complaints about the noise: the
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spark gaps sound much like an unmuffled chainsaw run flat out,
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wide open. I made peace, and am allowed to fire up until 10 P.M.
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with a days notice. But no more 2-3 A.M. testing...
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> I have used forced air cooling (ozone city) with good results
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> up to about 5 KVA. RQ
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DT> Have you tried cooling the air before it is blown into the
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DT> spark gap? You could run the air (I'm assumeing that your
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DT> using an air compressor) through a coil of copper tubing in
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DT> your ice bath. The best part is when the air expands as it
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DT> is blown into the gap, it will cool further. (basic physics
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DT> of gasses type stuff)
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I cool using forced air from a 220V industrial shop vac motor in
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my old set of gaps, the new gaps are quenched by air blast from a
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3.5 HP air compressor. The problem is the CFM of air flow
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required is so large that I don't think pre-cooling is pratical.
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It would require another design modification. The expanding air
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alone works pretty well. The real advantage to high speed forced
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air is that it not only cools, but it physically disrupts the
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high voltage arc, assisting the rotary in making the break.
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Your idea for a forced air cooled rotary gap was excellent. The
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only problem I see is in engineering the units to specs close
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enough to get excellent performance and safety. My rotors are
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dynamically balanced to 5000 RPM, and break rates need to be 450
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BPS or better for good operation. In designing a rotating break I
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try to keep the mass as low as possible on the rim: when they
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come apart they resemble an explosion, with lots of hot shrapnel
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and plenty of arcs and sparks!
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> The research goes into several directions...Anybody know how
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> to get lightning to excite a gas laser tube? RQ
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This was misunderstood by severl people. Specifically what I was
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wondering about was the possibility of using the oscillator
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output (which is similar to lightning) to excite a monopolar (one
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wire input) gas laser tube.
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DT> Do you know what the mix is in a standard NeHe laser tube?
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No. I am not an expert on lasers. But I am more than willing to
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learn. I am open to input from anybody with experiance.
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RQ> ... And if all else fails... Put another megavolt through
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RQ> it.
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DT> With your equipment, it sounds like you actually could...
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Absolutely, positively. Though I can't figure out how to make a
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RF voltmeter that would not be utterly consumed by the output of
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my machines. My guess is between 3 - 5 million volts output with
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the setup we have been discussing.
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As for proof. Yes, I can supply proof. I have some still photos
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taken at about 3600 watts which are very impressive. But as my
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work progressed I switched over to recording the experiments on
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video tape so I can analysize the tests in the safety and comfort
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of my living room. If anybody writes me I will happily provide
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a two hour video tape in exchange for: One blank (high quality)
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VHS tape, a postage pre-paid return mailer, $10.00 to pay for my
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time and effort in seeing that you get a high quality, two hour,
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recording of my work. Note this offer is not made on my behalf to
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make any money, and I am not resposible for anybody's safety
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should they decide to replicate any of the experiments I perform.
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I will send a glossy print for $1.00 and a SASE.
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Richard T. Quick II, 10028 Manchester Rd., Suite 253, Glendale,
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Missouri, 63122, USA
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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Msg#: 1971 Date:10-09-93 16:29
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From: Richard Quick
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To: Guy Daugherty
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Subj: 10KVA Tesla Coil
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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GD> I'd say if they're working that well for you, they're hardly
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GD> junk. Is there, uh, any point to this stuff, or just
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GD> blasting electrons across the ether?
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Yes, there is a purpose. Actually more than a few.
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High power particle accelerators is one. The typical linear
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accelerator of the 30's and 40's were RF powered. They abandoned
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the coils as they were not sufficently frequency stable, and the
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output was damped as opposed to continous wave. But, a book was
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published last year: NICKOLA TESLA ON HIS WORK WITH ALTERNATING
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CURRENTS AND THEIR APPLICATION TO WIRELESS TELEGRAPHY, TELEPHONY,
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AND TRANSMISSION OF POWER. Leland Anderson, Sun Publishing,
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available through 21st Century Books, P.O. Box 2001,
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Breckenridge, CO. 80424.
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This work is the result of research into the files of several law
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firms dating back to around 1915. Tesla was called to give
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depositions for three days to prepare for patent trials against
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the Marconi Company. Tesla clearly documented priority in
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frequency stablized continous wave signal production and radio
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signal transmission (and reception) on multiplexed circuits as
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early as 1891. All of Marconi's patents pertaining to radio were
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overturned by the U.S. Supreme Court in 1942 or 1943. The key to
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this is that Tesla's work in this area was extremely advanced,
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and most of it has yet to be applied to high powered accelerator
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work. His systems of continous wave RF current production with
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very high potentials is easily adapted to small, high powered,
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linear particle accelerators. The peak powers of his Colorado
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Spings machine (built, tested, and documented in 1899) exceeds
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all but the largest accelerators in existance today. By the way,
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the Tesla system is continous, and the modern systems are pulsed.
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The misunderstanding is damped vs. undamped wave production. The
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machine is capable of both, though the famous photos were taken
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when the machine was set up to produce damped (disruptive) waves.
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I don't think anybody really understood what Tesla was doing,
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certainly he never clearly explained it until I read the work
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above.
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In addition to this, a moderately sized machine should be capable
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of doing research into power transmission through earth resonate
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ground currents at frequencies under 30 khz (see document above).
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Later Tesla realized the particle accelerator potential of the
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machine and designed a power head for a particle beam weapon
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using the magnifier circuit as the signal generator. Lasers were
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not invented yet when Tesla died, but I believe a low impedance
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coil system can supply enormous peak powers to gas laser tubes.
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The Maser is a derivitive of this line of investgation, though
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the frequencies of operation are much higher than can be supplied
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from a coil system, the idea is exactly the same. Use a tuned gas
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laser tube as a cavity resonator excited by the RF output of the
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coil system.
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Then there is ball lightning research...
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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Msg#: 125 Date: 10-09-93 22:35
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From: Dave Halliday
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To: Richard Quick
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Subj: 10KVA Tesla Coil
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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>a two hour video tape in exchange for: One blank (high quality)
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>VHS tape, a postage pre-paid return mailer, $10.00 to pay for my
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>time and effort in seeing that you get a high quality, two hour,
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>recording of my work. Note this offer is not made on my behalf to
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>make any money, and I am not resposible for anybody's safety
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>should they decide to replicate any of the experiments I perform.
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>I will send a glossy print for $1.00 and a SASE.
|
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RQ>Richard T. Quick II, 10028 Manchester Rd., Suite 253, Glendale,
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>Missouri, 63122, USA
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Two comments:
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1) - What IS your monthly electrical bill
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2) - The $10 is in the mail Monday
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have been a wee fan of Tesla for a looong time - talking with some
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people now about maybe building a BIG one out in Seattle - have done a
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few small ones
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b QMPro 1.51 b 10... 9... 8... 7... 6... (Bo Derek getting older).
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-!- WM v3.10/92-0434
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! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
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(1:109/546)
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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Msg#: 2001 Date:10-10-93 16:33
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From: Richard Quick
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To: David Bearrow
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Subj: 10KVA Tesla Coil
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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DB> How did you go about winding your coil? What are the specs?
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DB> And how much did it cost?
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The first step in winding a coil is to select a coil form. The
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coil form should be a low loss material (we are talking RF
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losses) like polyethylene, polystyrene, or polypropylene: but the
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most common material is PVC plastic drain pipe (thinnest wall is
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best) which is high loss. I used a section of PVC thin wall flume
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duct.
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Ratios of coil height to width are important. Small coils work
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best with aspect ratios (height to width) around 5:1 - 4:1,
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larger coils (over 8" diam.) have aspect ratios around 3:1. Now
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we are talking about the actual winding length here, so allow an
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extra inch or so of coil form on each end. Determine the length
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required and cut the ends square.
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The form must be sanded smooth of surface imperfections, dried
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thoroughly, and if PVC is used, it must be sealed. A good sealer
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is polyurethane, another is two part epoxy paint. By sealing the
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surface of the PVC before you wind on wire you can negate the
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excessive losses in PVC plastic coil forms. If necessary the coil
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form may be sanded after the sealer had dried.
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The coil should be wound with good quality magnet wire. I use
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double Formvar enamel coated magnet wire. Magnet wire gives you
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maximum inductance. A coil should have over 900 turns, but not
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too much over 1000 turns. There is a little leeway here. Select a
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gauge of wire which will allow the aspect ratio and number of
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turns to fall within this range.
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I plug the ends of the coil form and run a dowel through a center
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hole so that it will spin. I set up the wire spool on one end of
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a pair of sawhorses, and the coil form on the other end. I wind
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the wire on by hand, making sure the windings are tight, smooth,
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and even. I use a dab of hot glue or tape to hold the first turns
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in place, and make sure to leave a tail of wire at either end.
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Once the coil is wound, it is sealed to prevent corona leakage
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and breakdown. I use the same sealers mentioned above. Coats of
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sealer are applied until there are no ridges and valleys in the
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wire. In other words the coats must build up until the wire is
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completely imbedded in sealer.
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The wound, sealed, coil is capped at both ends with plexiglas
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plates glued down with epoxy. I cut circles out of plexi sheet
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that is about the same thickness as the coil form. I rough up the
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surface around the edges to give the epoxy a bite. One small hole
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may be drilled into the bottom end plate to allow the air
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pressure to equalize, but under no circumstances should any other
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holes be drilled. The wire is never allowed inside the form.
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I have numerous coils, my largest coil has specs as follows:
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10.5" O.D. thin wall PVC flume duct, the coil form is 34" high.
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The coil is wound with #21 magnet wire, 1024 turns, actual
|
|||
|
|
winding length is 32", aspect ratio 3.05:1. The coil is sealed
|
|||
|
|
with eight coats of polyurethane on top of the wire and five
|
|||
|
|
coats under the wire so that the wire is not in contact with the
|
|||
|
|
PVC but is suspended in sealer.
|
|||
|
|
|
|||
|
|
Coils take time more than anything to construct. I suppose the
|
|||
|
|
material cost for my 10" coil is around $60.00. Smaller coils are
|
|||
|
|
cheaper of course. What can be expensive is putting together the
|
|||
|
|
rest of the oscillator components. Things like HV pulse
|
|||
|
|
capacitors, xfrmrs, and power controllers like variacs. Beginners
|
|||
|
|
can usually start with a few old neon sign xfrmrs, make some caps
|
|||
|
|
(homemade salt water caps are very cheap) or buy some used, and
|
|||
|
|
fire a small coil for under $150.00 from start to finish.
|
|||
|
|
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2098 Date: 10-12-93 18:29
|
|||
|
|
From: Bud Davis
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: Re: 10kva Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
>In a message of <Oct 09 20:51>, Richard Quick (1:100/4) writes:
|
|||
|
|
> A twenty-two megawat continuious fire gas laser...
|
|||
|
|
BD> I just picked up this thread a week ago, your recent postings
|
|||
|
|
BD> are saved to a file...This is very interesting!
|
|||
|
|
|
|||
|
|
MF> 22 MW is your input, with typical gas laser efficiency you'd
|
|||
|
|
MF> be lucky to squeek a (one) measly MegaWatt out. Just enough
|
|||
|
|
MF> to cut through armor at a few inches per second, or mabey a
|
|||
|
|
MF> foot of steel. Don't know about lunar soil. Some gasses
|
|||
|
|
MF> don't scale well to high powers, CO2 would probably be
|
|||
|
|
MF> the best candidate.
|
|||
|
|
|
|||
|
|
>I kind of thought CO2 was the way to go, but I was not sure. I
|
|||
|
|
>have not had much experience with high powered gas lasers,
|
|||
|
|
>though I did build a ruby rod laser in high school powered by a
|
|||
|
|
>xenon flash tube. I can't find the rod anywhere now...
|
|||
|
|
|
|||
|
|
BD>CO2 is a good choice for high power. I'm not sure which
|
|||
|
|
BD>transition level for CO2 is used for lasing but I could find
|
|||
|
|
BD>out.
|
|||
|
|
|
|||
|
|
>I have a feeling that with a properly designed system though,
|
|||
|
|
>the efficiencies could get considerably greater. My assumption
|
|||
|
|
>is based on some experiments which show that RF excites gases
|
|||
|
|
>much more easily than high voltage, high currents, or both.
|
|||
|
|
>Telsa went on and on about the advantages of using RF when
|
|||
|
|
>energizing gasses.
|
|||
|
|
|
|||
|
|
BD> A Soviet researcher named Kapitza developed RF devices with
|
|||
|
|
BD> plasma temperatures high enough to fuse hydrogen! They used a
|
|||
|
|
BD> cylindrical resonant chamber driven by a room full of tuned
|
|||
|
|
BD> circuits, the high temperature was observed in a corona
|
|||
|
|
BD> discharge along the axis...I guess it went on the back burner
|
|||
|
|
BD> along with the tokomak.
|
|||
|
|
|
|||
|
|
BD> Hmm...stick a CO2 filled tube in a properly sized RF
|
|||
|
|
BD> resonator... a few mirrors, heat sinks...
|
|||
|
|
|
|||
|
|
BD> I wish I had your original post. :-(
|
|||
|
|
|
|||
|
|
BD> ! Origin: Wendell Woodworking BBS(508)544-2402 (1:321/154)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2097 Date:10-13-93 00:46
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: David Bearrow
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
>> The coil should be wound with good quality magnet wire. I use
|
|||
|
|
>> double Formvar enamel coated magnet wire. Magnet wire gives
|
|||
|
|
>> you maximum inductance. A coil should have over 900 turns,
|
|||
|
|
>> but not too much over 1000 turns. There is a little leeway
|
|||
|
|
>> here. Select a gauge of wire which will allow the aspect
|
|||
|
|
>> ratio and number of turns to fall within this range.
|
|||
|
|
|
|||
|
|
DB> Did you calculate this so that the capacitive reactance
|
|||
|
|
DB> equals the inductive reactance? I understood thats what was
|
|||
|
|
DB> so interesting about Tesla's coils.
|
|||
|
|
|
|||
|
|
No. The balancing act that you are referring to occurs in the
|
|||
|
|
primary tank circuit. High voltage pulse discharging capacitance
|
|||
|
|
(capacitive reactance) is made to balance off the heavy primary
|
|||
|
|
coil (inductive reactance). The primary coil is made to very low
|
|||
|
|
resistance; like HEAVY cable, strap, or soft copper water pipe.
|
|||
|
|
The inductive reactance is "canceled" by the capacitive
|
|||
|
|
reactance, and a very low resistance "tank" is formed where heavy
|
|||
|
|
currents can oscillate with low loss. In order to excite the tank
|
|||
|
|
circuit, high voltage feed lines are brought in to charge the
|
|||
|
|
capacitors. Voltage rise in the capacitors (as they charge)
|
|||
|
|
breaks down the main system spark gap, and bang, the tank fires.
|
|||
|
|
Currents of hundreds of amps, with voltages in the thousands of
|
|||
|
|
volts, ring through the Tesla Tank Circuit.
|
|||
|
|
|
|||
|
|
The energy delivered can easily reach peak powers in the megawat
|
|||
|
|
range. Since the main system spark gap fires hundreds of times
|
|||
|
|
per second, these high peak powers are, for most practical
|
|||
|
|
purposes, continuous. This primary circuit energy is transmited
|
|||
|
|
through inductive coupling to the Tesla Secondary.
|
|||
|
|
|
|||
|
|
The secondary coil that I described in the quoted post is NOT a
|
|||
|
|
balanced coil. On the contrary, this coil is pushing the extreme
|
|||
|
|
of several design limits in the quest for more efficient power
|
|||
|
|
processing. The secondary coil, wound as I instructed, results in
|
|||
|
|
a very high inductance coil; but it has a significant internal
|
|||
|
|
capacitance and resistance due to the closeness of the windings,
|
|||
|
|
the length of the wire, and the number of turns.
|
|||
|
|
|
|||
|
|
The high inductance makes the secondary effective. The higher the
|
|||
|
|
inductance, the more energy can be absorbed from the primary tank
|
|||
|
|
circuit.
|
|||
|
|
|
|||
|
|
Resistance and internal capacitance limit the Tesla secondary for
|
|||
|
|
obvious reasons. Current, especially RF current, reacts poorly to
|
|||
|
|
resistance, which gets worse in small diameter wire. Internal
|
|||
|
|
Capacitance in a coil also reduces throughput, as the capacitance
|
|||
|
|
in the turns of wire slow the current peak.
|
|||
|
|
|
|||
|
|
Designing a potent Tesla secondary balances the maximum
|
|||
|
|
inductance (a positive factor) against the resistance and
|
|||
|
|
internal capacitance (negitive factors). It takes into account
|
|||
|
|
the need for "critical coupling" between the primary and
|
|||
|
|
secondary (for good energy transfer), resistance of the wire,
|
|||
|
|
internal capacitance between turns, and the breakdown voltages of
|
|||
|
|
the construction. The design given is well researched and proven.
|
|||
|
|
|
|||
|
|
> BUT THE COIL IS UNBALANCED!!! YOU SAID SO ABOVE!!!
|
|||
|
|
|
|||
|
|
Yes, it is VERY unbalanced. Yes, the Tesla circuit depends on
|
|||
|
|
balance for maximum efficiency. The high inductance of the
|
|||
|
|
secondary is balanced by the addition of a large (even huge) top
|
|||
|
|
capacitance. Donut shaped dischargers, called toroids, are used
|
|||
|
|
as a large capacitive air terminal. This air terminal capacitance
|
|||
|
|
"unloads" the secondary, and allows for current flow through the
|
|||
|
|
high inductance coil. The secondary coil, as I instructed, will
|
|||
|
|
not function well without an effective discharger; a capacitive
|
|||
|
|
reactance to balance it. Without it the coil will not survive
|
|||
|
|
much input energy and will self destruct. We have just pushed the
|
|||
|
|
limits with modern plastics in 1/4 wave Tesla oscillators.
|
|||
|
|
|
|||
|
|
Back to the primary; the circuit is tuned. By changing the
|
|||
|
|
location of the tank circuit "tap" connection to the primary, the
|
|||
|
|
frequency of the circuit is altered. The more turns, the lower
|
|||
|
|
the frequency. The secondary coil acts like an antenna. This wire
|
|||
|
|
when excited by the primary, vibrates electrically, and produces
|
|||
|
|
a quarter wave signal. The frequency is primarily a function of
|
|||
|
|
wire length and the capacity of the discharger. The primary and
|
|||
|
|
secondary are both adjusted to operate at the same frequency. So
|
|||
|
|
there is a lot of balancing going on.
|
|||
|
|
|
|||
|
|
By the way, I make my toroids out of 4-6" ridged flexible black
|
|||
|
|
polyproplyene drain pipe. I make a circle and mount some
|
|||
|
|
cardboard or thin masonite in the center, then cover the thing
|
|||
|
|
with aluminum plumbers tape, and foil glued with adhesive spray.
|
|||
|
|
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2135 Date:10-14-93 10:57
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Bud Davis
|
|||
|
|
Subj: Re: 10kva Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
BD> CO2 is a good choice for high power. I'm not sure which
|
|||
|
|
BD> transition level for CO2 is used for lasing but I could find
|
|||
|
|
BD> out.
|
|||
|
|
|
|||
|
|
RQ> Please check into it and let us know what turns up.
|
|||
|
|
|
|||
|
|
>I have a feeling that with a properly designed system though,
|
|||
|
|
>the efficiencies could get considerably greater. My assumption
|
|||
|
|
>is based on some experiments which show that RF excites gases
|
|||
|
|
>much more easily than high voltage, high currents, or both.
|
|||
|
|
>Telsa went on and on about the advantages of using RF when
|
|||
|
|
>energizing gasses.
|
|||
|
|
|
|||
|
|
BD> A Soviet researcher named Kapitza developed RF devices with
|
|||
|
|
BD> plasma temperatures high enough to fuse hydrogen! They used
|
|||
|
|
BD> a cylindrical resonant chamber driven by a room full of
|
|||
|
|
BD> tuned circuits, the high temperature was observed in a
|
|||
|
|
BD> corona discharge along the axis...I guess it went on the
|
|||
|
|
BD> back burner along with the tokomak.
|
|||
|
|
|
|||
|
|
I really feel that there is a lot of uncovered work in areas such
|
|||
|
|
as this. The publication I refered to last week (A transcription
|
|||
|
|
of a legal deposistion Tesla gave in 1916, over a period of three
|
|||
|
|
days) is only a year in print. Using some of the ideas that Tesla
|
|||
|
|
presented in this deposistion in work such this has not been
|
|||
|
|
done.
|
|||
|
|
|
|||
|
|
BD> Hmm...stick a CO2 filled tube in a properly sized RF
|
|||
|
|
BD> resonator... a few mirrors, heat sinks...
|
|||
|
|
|
|||
|
|
Yup, very close to my thoughts. Tesla states that low pressure
|
|||
|
|
gas, being highly conductive to RF, can be used as the actual
|
|||
|
|
resonator. So take a properly sized resonator, fill it with CO2,
|
|||
|
|
a few mirrors, heat sinks...
|
|||
|
|
|
|||
|
|
The actual resonator can be the laser tube, and losses can really
|
|||
|
|
be cut down. This is exactally how a MASER works, but needs to be
|
|||
|
|
scaled up for low frequency work. I have been wondering about the
|
|||
|
|
addition of a short coil to the resonate chamber to bring the
|
|||
|
|
frequency down, thereby keeping the size of the resonate chamber
|
|||
|
|
under control.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2138 Date:10-14-93 16:53
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Bud Davis
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
P.S.
|
|||
|
|
|
|||
|
|
I would also be very interested in the source material for the
|
|||
|
|
information you relayed on the Russian RF work. Experiments of
|
|||
|
|
this nature (using RF inputs to excite tuned resonators) is
|
|||
|
|
exactly along the line that my future work will be heading.
|
|||
|
|
|
|||
|
|
I don't know how much of this thread you were able to pick up in
|
|||
|
|
a week (I have seen a lot of posts indicating new boards getting
|
|||
|
|
this echo in the past week) but I am currently running and
|
|||
|
|
improving very high powered equipment. Experiments of this nature
|
|||
|
|
are not at all beyond my means. I have all of the power
|
|||
|
|
controller circuits, the capacitors, and the HV xfrmrs. I am
|
|||
|
|
developing a new liquid cooled, air blast gap to run in series
|
|||
|
|
with my rotary, and I have plenty of coils, both primaries and
|
|||
|
|
secondaries.
|
|||
|
|
|
|||
|
|
I have constructed and fired small Tesla Magnifiers in the 2.5
|
|||
|
|
KVA power range, and feel (like Tesla did) that the magnifier
|
|||
|
|
circuit is a clear and away breakthrough in RF power processing
|
|||
|
|
efficiency. A properly designed and constructed Tesla Magnifier
|
|||
|
|
system easily achieves 70% efficiency, and can be brought up to
|
|||
|
|
over 90% efficient in larger systems. They will produce and
|
|||
|
|
process damped and undamped (continuous wave) signals depending
|
|||
|
|
on the setup and power supply. The currents and voltages this
|
|||
|
|
circuit will handle are nothing short of mind boggling.
|
|||
|
|
|
|||
|
|
The Magnifier is designed specifically to drive a 1/4 wave
|
|||
|
|
resonator, whether it be helical (coil), coaxial, or cavity,
|
|||
|
|
makes no difference. I doubt that the Russian was using a large
|
|||
|
|
magnifier to drive the resonator in the experiment you mentioned.
|
|||
|
|
James & Kenneth Corum (PhDs) did not publish the mathematical
|
|||
|
|
treatise of the Tesla Magnifier until just a few years ago, and
|
|||
|
|
until the treatise was published, nobody was able to get the free
|
|||
|
|
resonator to function properly as part of the lumped, tuned
|
|||
|
|
circuit. These problems have been worked on and resolved by very
|
|||
|
|
few people since. I can count myself as one of the half dozen or
|
|||
|
|
so who have publicly documented success.
|
|||
|
|
|
|||
|
|
My best guess is that the Russian was using a large tube powered
|
|||
|
|
RF signal generator to drive a coaxial resonator. I think that if
|
|||
|
|
the experiment were redesigned, it could be done much cheaper, at
|
|||
|
|
much higher powers and efficiencies, with a Tesla Magnifier
|
|||
|
|
driver circuit. Tesla went on and on about this stuff too, nobody
|
|||
|
|
listened then, and few listen today; hell, people ask me all the
|
|||
|
|
time why I chase such "impracticalities". They don't understand
|
|||
|
|
that Tesla was so far ahead of his time that we still haven't
|
|||
|
|
caught up! My guess is that we stand today where Tesla stood in
|
|||
|
|
1898, as far as RF power processing efficiencies are concerned.
|
|||
|
|
|
|||
|
|
But photos or data from the Russian experiment would be
|
|||
|
|
invaluable for any work in this direction. What did he use for a
|
|||
|
|
transmission line? How did he introduce the signal into the
|
|||
|
|
resonator? From having done a little work with helical resonators
|
|||
|
|
to produce large voltages at very high currents, I realize
|
|||
|
|
technique is half the battle. Any additional information on this
|
|||
|
|
work would be appreciated.
|
|||
|
|
|
|||
|
|
As for what you missed, well it can't be as much as what is most
|
|||
|
|
likely still to come. Stay tuned!!! And feel free to ask about
|
|||
|
|
anything you don't understand.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1981 Date: 10-16-93 18:39
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Ron Beam
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
>On Oct 10 16:33 93, Richard Quick of 1:100/4 wrote:
|
|||
|
|
|
|||
|
|
>Coils take time more than anything to construct. I suppose
|
|||
|
|
>the material cost for my 10" coil is around $60.00. Smaller
|
|||
|
|
>coils are cheaper of course. What can be expensive is
|
|||
|
|
>putting together the rest of the oscillator components.
|
|||
|
|
>Things like HV pulse capacitors, xfrmrs, and power
|
|||
|
|
>controllers like variacs. Beginners can usually start with a
|
|||
|
|
>few old neon sign xfrmrs, make some caps (homemade salt
|
|||
|
|
>water caps are very cheap) or buy some used, and fire a
|
|||
|
|
>small coil for under $150.00 from start to finish. RQ
|
|||
|
|
|
|||
|
|
>Richard, do you know what frequency (if not 60Hz) and voltage
|
|||
|
|
>should be used for a coil such as you mentioned?
|
|||
|
|
|
|||
|
|
Frequency and voltage entirely depend on the aims of the
|
|||
|
|
designer/builder. Since none of these systems are purchased
|
|||
|
|
(nearly every component handcrafted) they can be built to nearly
|
|||
|
|
any specification desired (within reason). Frequency, input &
|
|||
|
|
ouput voltages, current, and impedance are just some of the
|
|||
|
|
variables. The idea with a Tesla coil system is to covert 60
|
|||
|
|
cycle line current into RF with very high efficiencies. My 10"
|
|||
|
|
secondary coil has a natural 1/4 wave resonate frequency of 132.5
|
|||
|
|
KHZ. I use a power distribution transformer run backwards (put
|
|||
|
|
240 in and get HV out) to step up my line voltage to ~20,000
|
|||
|
|
volts. This input RMS voltage is converted into RF (say 132.5
|
|||
|
|
KHZ) by the Tesla Tank Circuit. The high frequency conversion is
|
|||
|
|
achieved as a property of capacitve discharge through a coil
|
|||
|
|
(tuned oscillating circuit). The main system spark gap acts as a
|
|||
|
|
high voltage switch which allows the capacitor to charge over a
|
|||
|
|
period of time, then discharge nearly instantaneously. Because of
|
|||
|
|
the pulse discharge, the RF generated in the tank circuit has
|
|||
|
|
much greater peak power than the HV feed line from the step up
|
|||
|
|
transformer. The grounded secondary coil receives the EMF from
|
|||
|
|
the primary and converts the energy back into electricity (air
|
|||
|
|
core RF transformer). Since the secondary coil has a much greater
|
|||
|
|
number of windings the voltage is stepped up considerably.
|
|||
|
|
|
|||
|
|
> What does the coil do (or look like) when you turn it on?
|
|||
|
|
|
|||
|
|
A 1/4 wave Tesla coil generates very long RF sparks that resemble
|
|||
|
|
natural lighting in many aspects. These sparks do not need to
|
|||
|
|
strike a grounded object but can terminate in air.
|
|||
|
|
|
|||
|
|
>What can a person do with such a device once constructed? Does
|
|||
|
|
>it have any practical purpose other than to amuse your friends?
|
|||
|
|
|
|||
|
|
I first began to build small 1/4 wave (spark generating) Tesla
|
|||
|
|
coils for fun. I loved the light show, and so did my friends. As
|
|||
|
|
I gained experiance in building coils I realized that most of the
|
|||
|
|
"plans" were full of inaccuracies. I began to design my own
|
|||
|
|
systems to increase efficiency. As my interest and experiance
|
|||
|
|
grew, I discovered more advanced coil systems that Tesla designed
|
|||
|
|
(the Tesla Magnifier) and began initial research into other
|
|||
|
|
areas: particle acceleration, lasers, wireless power
|
|||
|
|
transmission, and particle beams. I am planning on making a very
|
|||
|
|
serious study in these areas in the next few years.
|
|||
|
|
|
|||
|
|
Dave Archer is a painter in California who uses a Tesla coil to
|
|||
|
|
electrically spread paint. He places his canvas on a grounded
|
|||
|
|
plate and directs the Tesla discharge over it. The resulting
|
|||
|
|
paintings are regularly featured as space backgrounds and hanging
|
|||
|
|
art on Star Trek TNG, Omni Magazine and several other publica-
|
|||
|
|
tions, as well as private collections. Tesla coils were also used
|
|||
|
|
in the time travel scenes in both Terminator movies, and are re-
|
|||
|
|
emerging in the special effects industry because they photograph
|
|||
|
|
well and the sparks are more realistic than computer generation
|
|||
|
|
or animation.
|
|||
|
|
|
|||
|
|
Two years ago a man (I don't have his name handy) was issued a
|
|||
|
|
patent for a thermo-couple using a Telsa discharge.
|
|||
|
|
|
|||
|
|
Tesla coils were used in the first induction heaters, and were
|
|||
|
|
employed medically for the treatment of arthritis and other joint
|
|||
|
|
and muscle problems. The same coil could be adjusted to generate
|
|||
|
|
sufficient voltage to produce X-Rays, and as such a Tesla coil
|
|||
|
|
was a standard medical instrument in Dr's offices in the early
|
|||
|
|
1900s. Nearly all of the first high quality X-Rays were produced
|
|||
|
|
with Tesla driven X-Ray tubes until the 1930's. The first self
|
|||
|
|
cauterizing "electric scalpels" were electrified with a Tesla
|
|||
|
|
coil.
|
|||
|
|
|
|||
|
|
A Tesla coil is in your monitor (flyback transformer). Tesla
|
|||
|
|
coils were also an important part of the first radio
|
|||
|
|
transmitters. My feeling is that the Tesla coil has a major place
|
|||
|
|
in modern physics, but has not been fully evaluated.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1983 Date:10-16-93 21:30
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
This thread seems to be getting a lot of attention and responses.
|
|||
|
|
I will try to give some basics here, and answer a few questions.
|
|||
|
|
|
|||
|
|
The modern 1/4 wave Tesla coil (sweet and simple, though there
|
|||
|
|
are other configurations) is an oscillator driven, air core
|
|||
|
|
resonate transformer.
|
|||
|
|
|
|||
|
|
The oscillating tank circuit drives the secondary coil. The tank
|
|||
|
|
circuit consists of pulse discharging capacitors, air gap (break)
|
|||
|
|
and the primary coil. In my previous post I said the setups are
|
|||
|
|
very flexible, so I will focus on specs for the 10KVA coil.
|
|||
|
|
|
|||
|
|
The primary coil is wound from a single 100' length of 1/2" soft
|
|||
|
|
copper water pipe placed on plexiglas stand off insulators. The
|
|||
|
|
inside turn starts at 14" in diameter, and the turns wind
|
|||
|
|
outward to form a flat pancake spiral, like the grooves on a
|
|||
|
|
phonograph record. The outside turn is 36" diam.. There are a
|
|||
|
|
total of 15 turns in this coil, spacing between turns is 1/4".
|
|||
|
|
|
|||
|
|
There are many ways to place the gap and capacitance in the tank
|
|||
|
|
circuit. I like the "balanced" circuit Tesla developed in
|
|||
|
|
Colorado Springs for his monster machine. In the balanced circuit
|
|||
|
|
the capacitance is divided into two equal parts and placed on the
|
|||
|
|
ends of the primary coil. The gap is placed across the HV feed
|
|||
|
|
line feeding the caps.
|
|||
|
|
|
|||
|
|
I own two .1 mfd 45 kvac pulse discharging capacitors. These two
|
|||
|
|
custom commercial units were purchased to supplement my 14
|
|||
|
|
homemade polyethylene/aluminum flashing/mineral oil units rated
|
|||
|
|
at .02 mfd 10 kvac pulse. With the 10 KVA coil I use these two
|
|||
|
|
commercial "caps". In the balanced circuit the capacitance is run
|
|||
|
|
in series with the primary, so the actual operating capacitance
|
|||
|
|
is only .05 mfd..
|
|||
|
|
|
|||
|
|
I connect one cap to the inside turn terminal of the primary.
|
|||
|
|
The second cap is connected to a movable "tap" lead which can
|
|||
|
|
clip to any location on the heavy primary coil. By moving the tap
|
|||
|
|
lead, the primary coil inductance is varied, and the tank circuit
|
|||
|
|
frequency can be changed.
|
|||
|
|
|
|||
|
|
With one capacitor terminal connected to each end of the primary,
|
|||
|
|
I still have two free capacitor terminals. Across these terminals
|
|||
|
|
I place the gap, and the HV feed lines.
|
|||
|
|
|
|||
|
|
When HV 60 cycle current is fed to the capacitors they charge. As
|
|||
|
|
the voltage rises, tension builds in the air gap. When the
|
|||
|
|
tension is sufficient, the gap breaks down and the capacitors are
|
|||
|
|
discharged rapidly. This spark gap acts as a high voltage switch.
|
|||
|
|
When the gap is open, the capacitors charge. When the gap fires,
|
|||
|
|
the caps are discharged in a pulse. Because of the voltage and
|
|||
|
|
currents involved, the gaps on larger coils employ a rotary
|
|||
|
|
break, almost exactly like a large car distributor at high speed.
|
|||
|
|
|
|||
|
|
This pulse discharging produces a large current (over 1000a@20kv
|
|||
|
|
in my system) from a modest transformer output (.5 amp @ 20kv).
|
|||
|
|
The pulse "rings" from capacitor plate, through the coil, to the
|
|||
|
|
second capacitor plate; and back again.
|
|||
|
|
|
|||
|
|
The frequency of the "ring" (oscillation) depends on the size of
|
|||
|
|
the cap, and the inductance (# of turns) in the coil. Since my
|
|||
|
|
capacitance is fixed, the coil size (inductance) is varied by
|
|||
|
|
moving the tap to a different location. In this fashion the spark
|
|||
|
|
gap oscillator is tuned. The parameters of this particular system
|
|||
|
|
allows frequencies from ~200 - 57 KHZ.
|
|||
|
|
|
|||
|
|
Now the secondary coil (specs in previous post) has a natural
|
|||
|
|
frequency of 132.5 KHZ. I load the secondary coil with top
|
|||
|
|
capacitance, most commonly a toroid shaped conductive terminal.
|
|||
|
|
This lowers the natural frequency of the sec. coil. My best
|
|||
|
|
results were obtained using a 40" diam. X 4" thick toroid
|
|||
|
|
discharger, lowering the frequency of the coil from 132.5 kHz to
|
|||
|
|
79 kHz.
|
|||
|
|
|
|||
|
|
The secondary coil with discharger is placed upright in the
|
|||
|
|
center of the primary coil. The secondary coil base wire is
|
|||
|
|
ground to a heavy, dedicated, RF ground. The air terminal is of
|
|||
|
|
course the other connection.
|
|||
|
|
|
|||
|
|
By tuning the frequency of the primary tank circuit to match the
|
|||
|
|
frequency of the secondary coil, energy is transferred from
|
|||
|
|
primary coil to secondary coil thorough mutual induction. This is
|
|||
|
|
much like a common transformer, but at these frequencies an iron
|
|||
|
|
core is wasteful.
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1984 Date:10-16-93 21:54
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
10KVA Tesla Coil cont.
|
|||
|
|
|
|||
|
|
In essence the primary coil is an inductive RF transmitter, and
|
|||
|
|
the grounded secondary coil is an inductive RF receiver.
|
|||
|
|
|
|||
|
|
The secondary coil receives the energy from the primary and
|
|||
|
|
become electrically excited. The coil develops a 1/4 standing
|
|||
|
|
wave of the system frequency, hence "1/4 wave" Tesla coil, or
|
|||
|
|
"1/4 wave helical resonator" are descriptive terms. What that
|
|||
|
|
means is that the potential at the base of the coil (ground) is
|
|||
|
|
"zero". The voltage rises up the coil until you reach maximum
|
|||
|
|
potential at the top. This is essential to producing good spark.
|
|||
|
|
|
|||
|
|
If you look at a sine wave of one complete oscillation you will
|
|||
|
|
see half of the wave above the "X" axis, and half of the wave
|
|||
|
|
below the "X" axis. The point where the sine wave crosses the "X"
|
|||
|
|
axis is ground potential or "zero" voltage.
|
|||
|
|
|
|||
|
|
On the "Y" axis you will find the peaks of the sine wave located
|
|||
|
|
at the 1/4 points of the wave length. These "Y" axis peaks are
|
|||
|
|
the locations of the maximum voltage. The "X" axis crossings
|
|||
|
|
("zero" volts) are the locations of maximum current in the wave.
|
|||
|
|
|
|||
|
|
So to come back to lay terms, the base of the excited Tesla
|
|||
|
|
secondary is at ground potential, but there is a lot of RF
|
|||
|
|
current flow. For the coil to operate, this current must be
|
|||
|
|
removed, hence a heavy RF ground is required.
|
|||
|
|
|
|||
|
|
The top of the coil is the high voltage end, where the 1/4 wave
|
|||
|
|
voltage peak is located. Since the voltage is RF, and the
|
|||
|
|
discharge terminal is air insulated, the voltage simply breaks
|
|||
|
|
down the air. Large sparks and streamers and corona leave the
|
|||
|
|
discharger in a display unequalled by anything else in my
|
|||
|
|
experience.
|
|||
|
|
|
|||
|
|
The high voltage can be trapped in the system by adding
|
|||
|
|
discharger capacitance until the spark will not break out. Energy
|
|||
|
|
is constantly fed into the coil from the primary, and the only
|
|||
|
|
escape is through radiation or the ground wire. Radiation alone
|
|||
|
|
simply cannot remove the energy in the coil, so massive currents
|
|||
|
|
are forced into the ground. This forms the basis of Tesla's
|
|||
|
|
system for wireless power transmission.
|
|||
|
|
|
|||
|
|
Experiments confirming his ideas can be performed with small
|
|||
|
|
coils. I took a single 6" Tesla secondary, no primary or tank
|
|||
|
|
circuit, just a coil and a discharger; and walked over a quarter
|
|||
|
|
mile, to a nearby creek. I grounded the coil by placing 10' of
|
|||
|
|
aluminum flashing in the creek water. Back in my basement, an
|
|||
|
|
assistant fired a Tesla coil that operated at the same frequency
|
|||
|
|
as my "free" coil in the creek. The system being fired was loaded
|
|||
|
|
with discharger, so spark could not break out.
|
|||
|
|
|
|||
|
|
Down in the creek I was able to light bulbs from the top of the
|
|||
|
|
grounded coil, despite the 1/4 mile distance (and don't forget a
|
|||
|
|
creek bank and a rebar wall) between my location and the power
|
|||
|
|
supply. This coil was not receiving radiated signal, it was
|
|||
|
|
resonating on base fed ground current.
|
|||
|
|
|
|||
|
|
Coils can be forced to operate at frequencies other than the
|
|||
|
|
natural 1/4 wave by top loading "extra" coils or other resonators
|
|||
|
|
on the end of the system. Tesla used this more complex "Magnifier
|
|||
|
|
Coil" circuit in the Colorado Springs machine. In the Magnifier,
|
|||
|
|
the secondary coil is forced to resonate at 1/8th, 1/16th,
|
|||
|
|
1/32nd, or any other harmonic of the system frequency. A
|
|||
|
|
transmission line is used to take CURRENT from the secondary to a
|
|||
|
|
RESONATOR located away from the primary/secondary driver system.
|
|||
|
|
|
|||
|
|
The resonator may be helical (coil), coaxial, or cavity. In this
|
|||
|
|
way the Tesla system may be used as an efficient driver for
|
|||
|
|
experiments in other areas of physics. I have wondered about the
|
|||
|
|
possible use of a tuned cavity resonate laser tube, or linear
|
|||
|
|
particle accelerator. Another guy told me about a Russian using
|
|||
|
|
coaxial resonators for fusion.
|
|||
|
|
|
|||
|
|
Tesla built a system for the worldwide transmission of electrical
|
|||
|
|
power by top loading the "extra" coil (a base fed 1/4 wave
|
|||
|
|
helical resonator) so spark would not break out. This forced the
|
|||
|
|
tremendous energy to ground. He tuned the system so that the
|
|||
|
|
ground current was also earth resonate. This was a double ended
|
|||
|
|
resonator system of very high efficiency. The earth acted as a
|
|||
|
|
cavity resonator on the base (for the ground current) the extra
|
|||
|
|
coil was a helical resonator a with radiating discharger in the
|
|||
|
|
air. He stated the system was to be used as a multiplexed
|
|||
|
|
wireless transmitter from both the ground and air terminals (he
|
|||
|
|
had tuning and harmonic coils in the ground path).
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2110 Date:10-20-93 00:18
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
OK, back on topic.
|
|||
|
|
|
|||
|
|
I just dug up a catalog for some more source material. This one
|
|||
|
|
is the Tesla Book Company, P.O. Box 121873, Chula Vista, CA.
|
|||
|
|
91912. They have a 1-800-398-2056 information, catalog, and
|
|||
|
|
ordering service. They carry a book "VACUUM TUBE TESLA COILS",
|
|||
|
|
and I believe that this is the same book that I am going to be
|
|||
|
|
referring to. The Book I am looking at, VACUUM TUBE TESLA COILS,
|
|||
|
|
is written by James & Kenneth Corum. You may also contact Corum &
|
|||
|
|
Associates, Inc. at 8551 State Route 534, Windsor, OH. 44099. I
|
|||
|
|
have met the Corums, they are for real.
|
|||
|
|
|
|||
|
|
I see some other publications worthy of note in this catalog:
|
|||
|
|
TESLA COIL DESIGNER is a computer program written by my friend
|
|||
|
|
Walt Noon, I use this program to determine ball park frequencies
|
|||
|
|
and inductances in mathematical simulation before I wind any
|
|||
|
|
coil. This software is menu driven and Walt has been very helpful
|
|||
|
|
in working out the bugs and adding features with me. It works and
|
|||
|
|
saves hours of designing time.
|
|||
|
|
|
|||
|
|
I see an entry here for Dr. Nickola Tesla's Diary 1899-1900. This
|
|||
|
|
was the time Tesla spent in Colorado Springs working on his
|
|||
|
|
monster oscillator, but this does not sound like the preferred
|
|||
|
|
reference, THE COLORADO SPRINGS NOTES which includes most of the
|
|||
|
|
printable photographs of the lab and the machine. However, the
|
|||
|
|
original prints of this work (as I look at my copy) are from
|
|||
|
|
NOLIT, in Belgrad, Yugoslavia, and are now expensive. 21st
|
|||
|
|
Century Books has copies, P.O.Box 2001, 100 South Ridge St. #101,
|
|||
|
|
Breckenridge, CO. 80424-2001, tel. 303-453-9293, but they want
|
|||
|
|
$100.00 where I paid $45.00 a few years back. I will have to take
|
|||
|
|
better care of mine...
|
|||
|
|
|
|||
|
|
Both of these companies sell "new age science", "zero point
|
|||
|
|
energy" and "scalar wave" material; which in my opinion is
|
|||
|
|
garbage and not worth the paper the printing is on.
|
|||
|
|
|
|||
|
|
Now the Corum book which I will talk about briefly, is a piece of
|
|||
|
|
hard core electronics engineer stuff, but it is worth trying to
|
|||
|
|
muck through for those who don't believe coil driven RF equipment
|
|||
|
|
can have "practical" uses in physics and electronics. It contains
|
|||
|
|
most of the important facts on "A Technical Analysis of the Extra
|
|||
|
|
Coil as a Slow Wave Helical Resonator". This refers of course to
|
|||
|
|
the function of the "extra" coil in Tesla's Colorado Springs
|
|||
|
|
machine. But the book is much more. Tesla driven X-Ray machines,
|
|||
|
|
tapped coaxial helical resonators, particle accelerators, cavity
|
|||
|
|
resonators, etc.
|
|||
|
|
|
|||
|
|
The book has charts and diagrams even the most novice electronics
|
|||
|
|
buff would understand sandwiched between pages of calculus needed
|
|||
|
|
to design and construct the equipment. One page (XI-10) shows the
|
|||
|
|
development of conducting electrical resonators from Lord Kelvin
|
|||
|
|
through Tesla, to Schumann's verification of the earth as an
|
|||
|
|
electrical cavity resonator in 1952.
|
|||
|
|
|
|||
|
|
Books of this quality are rare, and make excellent reading for
|
|||
|
|
anybody interested in high energy electronics. It has an
|
|||
|
|
excellent bibliography.
|
|||
|
|
|
|||
|
|
In searching for material to lead to coil powered high energy
|
|||
|
|
devices I can say that this points to the right directions.
|
|||
|
|
|
|||
|
|
"The coaxial geometries do have the advantage of compactness and
|
|||
|
|
portability. And, this may be of significance to those interested
|
|||
|
|
in directed energy devices."
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2109 Date:10-20-93 21:35
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
A couple of weeks ago someone posted me some "new to me"
|
|||
|
|
information about Russian RF resonator work that resulted in a
|
|||
|
|
machine capable of fusion. I asked for some additional
|
|||
|
|
information on this subject, and as of yet I have not heard back.
|
|||
|
|
|
|||
|
|
However, I have done some delving of my own and came up with some
|
|||
|
|
very interesting information about this guy (P.L. Kapitza). I
|
|||
|
|
stumbled across the name doing some related research (yes this
|
|||
|
|
thread is based in fact, and Tesla's work has practical apps)...
|
|||
|
|
|
|||
|
|
His name is Peter L. Kapitza, and he shared in a Nobel Prize
|
|||
|
|
in 1978 with Americans Arno Penzias and Robert W. Wilson for his
|
|||
|
|
work in magnetism and the behavior of matter at extremely low
|
|||
|
|
temperatures. His work on RF resonators was apparently done much
|
|||
|
|
earlier, as I find a reference to "High Powered Electronics" in a
|
|||
|
|
Russian periodical, Uspekhi Fizicheskikl Nauk, Vol 78 (November
|
|||
|
|
2, 1962, pp. 181-265). In the same bibliography I find another
|
|||
|
|
"more unusual" reference by physicist Jerzy R. Konieczny "New
|
|||
|
|
Weapon 'X'" in a Polish periodical, Wojskowy Przeglad Lotniczy,
|
|||
|
|
(November 2, 1963, pp. 72-75) apparently referring to a particle
|
|||
|
|
beam device...
|
|||
|
|
|
|||
|
|
A little more research back to Kapitza, turned up Tesla's name in
|
|||
|
|
a quote!!! (See Margaret Cheney, TESLA, MAN OUT OF TIME, pp.284,
|
|||
|
|
Dorset Press, 1981, available from Barnes & Noble, 126 Fifth Ave,
|
|||
|
|
New York, NY 10011, tel 201-767-7079)
|
|||
|
|
|
|||
|
|
The quote is too long to reproduced here (it refers to high
|
|||
|
|
powered particle beams), but it clearly shows Kapitza was very
|
|||
|
|
much aware of Tesla's work in this country. Tesla was, by the
|
|||
|
|
way, the first to investigate "magnetism and the behavior of
|
|||
|
|
matter at extremely low temperatures" in the search of super-
|
|||
|
|
conductivity for his coils. Kapitza credits him.
|
|||
|
|
|
|||
|
|
Tesla lost a laboratory in New York, to fire, at 2:30 A.M., March
|
|||
|
|
13, 1895. The fire is believed to have been caused as a result of
|
|||
|
|
liquid air leaking from his equipment. Tesla stated to the fire
|
|||
|
|
officials at the time that the air liquidation equipment was the
|
|||
|
|
only thing left running in his absence. He used the liquid air to
|
|||
|
|
cool his coils for experiments in high efficiency magnetism...
|
|||
|
|
|
|||
|
|
Now I'm not saying this means anything... but I keep finding
|
|||
|
|
these references dancing around the subject of particle beam
|
|||
|
|
weapons, fusion, high energy lasers, and power transmission
|
|||
|
|
without wires. These are modern references mind you, not Tesla's;
|
|||
|
|
but the deeper I dig, the more I find Tesla's name.
|
|||
|
|
|
|||
|
|
I am also finding out more information on involvement of
|
|||
|
|
"National Security" interests in these references. I mentioned
|
|||
|
|
about James & Kenneth Corum having a paper taken from them after
|
|||
|
|
a presentation by the FBI. In Cheney's book (pp. 310) we find
|
|||
|
|
this... "the U.S. government has deemed the material important to
|
|||
|
|
national security and has been at great pains to conceal it's
|
|||
|
|
existence." She is referring to all of Tesla's advanced (and of
|
|||
|
|
course unpublished) research and papers taken into U.S. custody
|
|||
|
|
at the time of his death.
|
|||
|
|
|
|||
|
|
Now I am sick to death of hearing about Tesla conspiracy, ad
|
|||
|
|
nauseam. But I ask this based on fact (check em yourself). If the
|
|||
|
|
work Tesla did in these areas does not yield workable devices,
|
|||
|
|
then why would there be a "national security" interest? Tesla
|
|||
|
|
laid the ground work for people like Kapitza, Konieczny, and our
|
|||
|
|
own SDI projects.
|
|||
|
|
|
|||
|
|
Again, I will state that it is not illegal to build coils or
|
|||
|
|
other resonators, lasers, particle accelerators, masers, rail
|
|||
|
|
guns, etc. Though I sometimes feel that the government wants
|
|||
|
|
everything but taxes made illegal.
|
|||
|
|
|
|||
|
|
I am still not able to locate any information in english on
|
|||
|
|
Kapitza's RF resonator fusion machine. So whoever sent me the
|
|||
|
|
post, please keep digging.
|
|||
|
|
|
|||
|
|
Now back to the topic...
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2133 Date: 10-21-93 17:41
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
The Tesla Magnifier
|
|||
|
|
|
|||
|
|
What exactly is the Tesla Magnifier, and how does it differ from
|
|||
|
|
the standard 1/4 wave Tesla Coil? This question has been asked
|
|||
|
|
over and over in the past 93 years. I think I can give some
|
|||
|
|
insight into this for a better understanding of the system. A lot
|
|||
|
|
of the information I will present here (to the best of my knowl-
|
|||
|
|
edge, feel free to prove me wrong) appears in text form for the
|
|||
|
|
first time.
|
|||
|
|
|
|||
|
|
I have explained in some detail the set up and basic operation of
|
|||
|
|
my 10KVA 1/4 wave system. To get a mental picture of how the
|
|||
|
|
coils are physically positioned for firing in this 1/4 wave
|
|||
|
|
system, imagine a 12" phonograph record, with a Quaker Oats
|
|||
|
|
canister sitting upright on the center. The phonograph record
|
|||
|
|
represents the wide flat primary coil, and the oats canister
|
|||
|
|
represents the 1/4 wave secondary coil. The secondary coil would
|
|||
|
|
be topped with a toroid shaped discharger.
|
|||
|
|
|
|||
|
|
These coils are "loosely coupled", "coupling" in coil systems
|
|||
|
|
refers to the mutual inductance between primary and secondary.
|
|||
|
|
The coupling is kept loose because these coils are capable of
|
|||
|
|
such high energy transfers that the secondary is overdriven or
|
|||
|
|
"split" if placed in too close proximity to the primary.
|
|||
|
|
Splitting of the secondary is seen in coils that are over driven
|
|||
|
|
or "over coupled". The excess energy absorbed in the secondary
|
|||
|
|
coil causes a frequency split with the result that harmonic 1/4
|
|||
|
|
wave voltage peaks appear in the secondary coil windings. These
|
|||
|
|
harmonic peaks show up as sparks that break out from the
|
|||
|
|
sides of the coil. If the coupling is not loosened, or input
|
|||
|
|
powers reduced, the coil will be destroyed in short order.
|
|||
|
|
|
|||
|
|
This is a serious limiting factor in 1/4 wave Tesla systems.
|
|||
|
|
"Critical" or perfect coupling limits the amount of energy that
|
|||
|
|
can be processed through the system. Large toroid dischargers
|
|||
|
|
assist in unloading the secondary, and allow for closer coupling,
|
|||
|
|
but this is like treating the symptom, not effecting a cure.
|
|||
|
|
|
|||
|
|
The problem with the 1/4 wave coil system is that all of the
|
|||
|
|
energy processed in the system remains trapped in the secondary
|
|||
|
|
until it is removed by spark. As spark lengths and input powers
|
|||
|
|
grow, so do coupling problems. Strain is also put on the tank
|
|||
|
|
circuit. Energy can flow in both directions in the 1/4 wave
|
|||
|
|
system, and secondary energies can unload not only in spark from
|
|||
|
|
the discharge terminal, but can also flow back into the primary
|
|||
|
|
tank circuit. This results in nightmarish problems "quenching"
|
|||
|
|
the arc at the main system spark gaps. In theory no more than 50%
|
|||
|
|
of the input energy can be converted into discharge off the
|
|||
|
|
secondary air terminal, as both primary and secondary energies
|
|||
|
|
equalize before a break can be effected at the main system spark
|
|||
|
|
gap. Once the break (open, non-firing spark gap) is made, the
|
|||
|
|
secondary energy is trapped, and must be radiated or discharged.
|
|||
|
|
|
|||
|
|
Tesla realized that critical coupling limited the efficiency of
|
|||
|
|
the system, and came up with a unique solution. He added an
|
|||
|
|
"extra" coil to the secondary. The extra coil is a normal 1/4
|
|||
|
|
wave helical resonator, or Tesla secondary. The coil was placed
|
|||
|
|
away from any inductive effects of the primary/secondary "driver"
|
|||
|
|
coils, and was bottom fed by transmission line with the output of
|
|||
|
|
the driver secondary. Tesla was able to determine certain
|
|||
|
|
"harmonic" shifts in the system, but nobody else was able to
|
|||
|
|
figure out what was happening for years and years.
|
|||
|
|
|
|||
|
|
What is happening is this. In order for the "extra" coil to
|
|||
|
|
function properly it must be fed RF current that matches it's
|
|||
|
|
natural 1/4 wave frequency. In order to provide a working system,
|
|||
|
|
the output of the secondary driver coil in his three coil Mag-
|
|||
|
|
nifier must be shifted away from it's normal 1/4 wave output.
|
|||
|
|
|
|||
|
|
The normal 1/4 wave output (high voltage peak) of the Tesla
|
|||
|
|
secondary must be shifted to a lower harmonic in order for the
|
|||
|
|
extra coil to receive current. If you base fed an extra coil with
|
|||
|
|
1/4 wave voltage peaks, all you would get would be sparks from
|
|||
|
|
the transmission line, and a fire at the base of an extra coil
|
|||
|
|
(I've done it). Experiments, and review of Tesla work show that
|
|||
|
|
the 1/8 wave harmonic is preferred. The extra coil will cause
|
|||
|
|
some shifting of the driver coil output, but the system operates
|
|||
|
|
best when THE DRIVER COIL IS WOUND WITH THE PROPER LENGTH OF WIRE
|
|||
|
|
TO FACILITATE 1/8th WAVE OUTPUT.
|
|||
|
|
|
|||
|
|
This boosts efficiency in several ways. First, the energy in
|
|||
|
|
1/8th wave output is about 20% greater than the energy of a 1/4
|
|||
|
|
wave peak. The 1/8th wave location on the sine represents 70%
|
|||
|
|
of the wave energy, as opposed to 50% of the energy at the 1/4
|
|||
|
|
wave point; the 1/8 wave point being the product of both current
|
|||
|
|
and voltage at this location on the sine. While this may seem a
|
|||
|
|
little technical to the novice, a 20% gain is realized by
|
|||
|
|
shifting the output to the lower, 1/8th wave harmonic.
|
|||
|
|
|
|||
|
|
The second increase in efficiency is due to the fact that the
|
|||
|
|
secondary, or driver coil, is no longer responsible for the end
|
|||
|
|
processing of the system energy. The majority of the resonate
|
|||
|
|
rise, or VSWR, occurs in the uncoupled resonator located some
|
|||
|
|
distance away, and fed by transmission line. The secondary is no
|
|||
|
|
longer stressed by a high voltage point at the top of the coil,
|
|||
|
|
and the current produced in the secondary is removed rapidly by
|
|||
|
|
the transmission line to the end resonator (extra coil).
|
|||
|
|
|
|||
|
|
|
|||
|
|
The third boost to efficiency is the ability to tighten the
|
|||
|
|
coupling between the primary and secondary driver set. The coils
|
|||
|
|
can be placed with much greater mutual inductance (tighter
|
|||
|
|
coupling). Energy can then be forced into the driver in much
|
|||
|
|
larger amounts without the problems of splitting and breakdown.
|
|||
|
|
The coils can be arranged more like two nested buckets, with one
|
|||
|
|
inside the other, as opposed to a phonograph record with an oats
|
|||
|
|
canister on top.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 142 Date: 10-24-93 20:25
|
|||
|
|
From: David Tiefenbrunn
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
On 10-20-93 Richard Quick wrote to David Tiefenbrunn...
|
|||
|
|
|
|||
|
|
RQ> RQ> The following instructions are for a pulse discharging
|
|||
|
|
RQ> RQ> capacitor with a .02 uf at 35 kvdc rating.
|
|||
|
|
Thanks for the rest of the info.
|
|||
|
|
|
|||
|
|
I was talking to another engineer that I know,
|
|||
|
|
and I mentioned your Tesla coil. He has a 150W
|
|||
|
|
T-coil. We got to talking about spark gaps.
|
|||
|
|
It seems there used to be a rather large industry
|
|||
|
|
for them, back before vacuume tubes (and even larger
|
|||
|
|
than 10KW). One type was basically a stack of convex
|
|||
|
|
metal disks, with heatsink fins on the outside. The
|
|||
|
|
disks were spaced rather close together (maybe .05"?)
|
|||
|
|
but there were MANY in the stack. This spreads the heat
|
|||
|
|
around. Maybe something like that with compressed air
|
|||
|
|
cooling is a solution. I can try to get more info
|
|||
|
|
if you want. He was also aware of *room* sized
|
|||
|
|
spark gaps in use back then.
|
|||
|
|
|
|||
|
|
Dave
|
|||
|
|
|
|||
|
|
___
|
|||
|
|
* OFFLINE 1.54 * I love the smell of ozone in the morning.
|
|||
|
|
|
|||
|
|
-!- Maximus 2.01wb
|
|||
|
|
! Origin: Abbey Road BBS Higganum, Ct. USA (1:320/5967)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 139 Date: 10-26-93 11:57
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
>a two hour video tape in exchange for: One blank (high
|
|||
|
|
>quality) VHS tape, a postage pre-paid return mailer, $10.00 to
|
|||
|
|
>pay for my time and effort in seeing that you get a high
|
|||
|
|
>quality, two hour, recording of my work. Note this offer is
|
|||
|
|
>not made on my behalf to make any money, and I am not
|
|||
|
|
>resposible for anybody's safety should they decide to
|
|||
|
|
>replicate any of the experiments I perform. I will send a
|
|||
|
|
>glossy print for $1.00 and a SASE.
|
|||
|
|
|
|||
|
|
RQ>Richard T. Quick II, 10028 Manchester Rd., Suite 253,
|
|||
|
|
>Glendale, Missouri, 63122, USA
|
|||
|
|
|
|||
|
|
DH> Two comments:
|
|||
|
|
|
|||
|
|
DH> 1) - What IS your monthly electrical bill
|
|||
|
|
|
|||
|
|
I'd rather not go into electric bills, let's just say it's going
|
|||
|
|
to get worse...
|
|||
|
|
|
|||
|
|
DH> 2) - The $10 is in the mail Monday
|
|||
|
|
|
|||
|
|
I will be sure you get lots of Arcs & Sparks for your hard earned
|
|||
|
|
money. I will get the tape out the following mail day. It would
|
|||
|
|
help to know if you are more interested in seeing spark or
|
|||
|
|
techinque.
|
|||
|
|
|
|||
|
|
DH> have been a wee fan of Tesla for a looong time - talking
|
|||
|
|
DH> with some people now about maybe building a BIG one out in
|
|||
|
|
DH> Seattle - have done a few small ones.
|
|||
|
|
|
|||
|
|
Big coils are a challenge. But I really think (and experiments
|
|||
|
|
prove) that the Magnifier System is more efficient as you scale
|
|||
|
|
up. Large 1/4 wave Tesla coils are not nearly as efficient.
|
|||
|
|
|
|||
|
|
Send me a post and let me know what you think of the video.
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 172 Date: 10-27-93 13:29
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: David Tiefenbrunn
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
DT> Thanks for the rest of the info.
|
|||
|
|
|
|||
|
|
No problem, I hope you find it useful, I sure have. You don't see
|
|||
|
|
plans for components like that everywhere.
|
|||
|
|
|
|||
|
|
DT> I was talking to another engineer that I know,
|
|||
|
|
DT> and I mentioned your Tesla coil. He has a 150W
|
|||
|
|
DT> T-coil. We got to talking about spark gaps.
|
|||
|
|
DT> It seems there used to be a rather large industry
|
|||
|
|
DT> for them, back before vacuum tubes (and even larger
|
|||
|
|
DT> than 10KW). One type was basically a stack of convex
|
|||
|
|
DT> metal disks, with heatsink fins on the outside. The
|
|||
|
|
DT> disks were spaced rather close together (maybe .05"?)
|
|||
|
|
DT> but there were MANY in the stack. This spreads the heat
|
|||
|
|
DT> around. Maybe something like that with compressed air
|
|||
|
|
DT> cooling is a solution. I can try to get more info
|
|||
|
|
DT> if you want. He was also aware of *room* sized
|
|||
|
|
DT> spark gaps in use back then.
|
|||
|
|
|
|||
|
|
I am always interested in more information. I live for the stuff.
|
|||
|
|
As to the gaps you are describing, they are called "quench" gaps.
|
|||
|
|
The metal discs are separated by gaskets of mica. The mica gasket
|
|||
|
|
determines the gap distance between plates. The gasket prevents
|
|||
|
|
air exchange, so as the gap breaks in, the O2 is consumed and
|
|||
|
|
they run with in a nitrogen atmosphere.
|
|||
|
|
|
|||
|
|
These plates were machined to very close tolerances, and the
|
|||
|
|
actual electrode surface was kept fairly small. The large plate
|
|||
|
|
was used for a heat sink. The best gaps of this type were German
|
|||
|
|
made by Telefunken.
|
|||
|
|
|
|||
|
|
The advantage of the quench gap is they produce a continuous wave
|
|||
|
|
(undamped) oscillation in the tank circuit. They were employed in
|
|||
|
|
the first long range Tesla transmitters. Most of the major ship
|
|||
|
|
lines (with the exception of White Star I believe) used Tesla
|
|||
|
|
transmitters with Telefunken quench gaps. Telefunken had
|
|||
|
|
contracts with the shipping lines for gap service, and after so
|
|||
|
|
many hours of operation the gap would be removed by a certified
|
|||
|
|
Telefunken technician, cleaned and serviced. Per contract nobody
|
|||
|
|
else was allowed to break the seals. Telefunken had facilities in
|
|||
|
|
every major port.
|
|||
|
|
|
|||
|
|
Tesla used disruptive breaks in his demonstrations, but clearly
|
|||
|
|
documented that continuous waves from quenched or CW gap systems
|
|||
|
|
were used for transmission of electricty (both for power
|
|||
|
|
transmission and radio). Now this is where is starts to get
|
|||
|
|
interesting. 1/4 wave Tesla systems produce much less spark with
|
|||
|
|
a quench gap, but they will light low pressure gas bulbs many
|
|||
|
|
yards away, so they definately radiate much better. But the Tesla
|
|||
|
|
Magnifier with a quench gap produces excellent spark, AND
|
|||
|
|
radiates over long distances, especially if sparks are prevented
|
|||
|
|
by loading it up with discharger.
|
|||
|
|
|
|||
|
|
The problem with high powered systems running quench gaps is as
|
|||
|
|
you say, the gaps get huge, and you would almost need a cooling
|
|||
|
|
tower to remove the heat. This heat represents high loss from the
|
|||
|
|
tank circuit. Tesla solved this problem too, but the solution is
|
|||
|
|
not well known. He began running multiple phases directly into
|
|||
|
|
his oscillators, up to 6 phases in the experimental Colorado
|
|||
|
|
Springs, and 4 phases in the commercial Wardenclyff plant on Long
|
|||
|
|
Island. By using a quench gap system in series with a rotary
|
|||
|
|
break running at very high speeds (40,000 BPS and possibly even
|
|||
|
|
higher) he was able to obtain CW output from a disruptive (read
|
|||
|
|
rotary) gap system. This way he was able to reduce loss, keep the
|
|||
|
|
size under control, and still get CW output; at the same time he
|
|||
|
|
was able to really increase the power processed by the system.
|
|||
|
|
This is the type of system required for more advanced work with
|
|||
|
|
coil powered directed energy devices.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 200 Date: 10-30-93 09:52
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>THIS POST MAY BE A REPEAT. MY SYSOP INFORMED MY 10/29/93 THAT
|
|||
|
|
RQ>HE TURNED OFF ALL CONFERENCES FOR OUTGOING MAIL 10 DAYS AGO BY
|
|||
|
|
RQ>MISTAKE. WHAT A MESS!
|
|||
|
|
|
|||
|
|
The Tesla Magnifier
|
|||
|
|
|
|||
|
|
What exactly is the Tesla Magnifier, and how does it differ from
|
|||
|
|
the standard 1/4 wave Tesla Coil? This question has been asked
|
|||
|
|
over and over in the past 93 years. I think I can give some
|
|||
|
|
insight into this for a better understanding of the system. A lot
|
|||
|
|
of the information I will present here (to the best of my knowl-
|
|||
|
|
edge, feel free to prove me wrong) appears in text form for the
|
|||
|
|
first time.
|
|||
|
|
|
|||
|
|
I have explained in some detail the set up and basic operation of
|
|||
|
|
my 10KVA 1/4 wave system. To get a mental picture of how the
|
|||
|
|
coils are physically positioned for firing in this 1/4 wave
|
|||
|
|
system, imagine a 12" phonograph record, with a Quaker Oats
|
|||
|
|
canister sitting upright on the center. The phonograph record
|
|||
|
|
represents the wide flat primary coil, and the oats canister
|
|||
|
|
represents the 1/4 wave secondary coil. The secondary coil would
|
|||
|
|
be topped with a toroid shaped discharger.
|
|||
|
|
|
|||
|
|
These coils are "loosely coupled", "coupling" in coil systems
|
|||
|
|
refers to the mutual inductance between primary and secondary.
|
|||
|
|
The coupling is kept loose because these coils are capable of
|
|||
|
|
such high energy transfers that the secondary is overdriven or
|
|||
|
|
"split" if placed in too close proximity to the primary.
|
|||
|
|
Splitting of the secondary is seen in coils that are over driven
|
|||
|
|
or "over coupled". The excess energy absorbed in the secondary
|
|||
|
|
coil causes a frequency split with the result that harmonic 1/4
|
|||
|
|
wave voltage peaks appear in the secondary coil windings. These
|
|||
|
|
harmonic peaks show up as sparks that break out from the
|
|||
|
|
sides of the coil. If the coupling is not loosened, or input
|
|||
|
|
powers reduced, the coil will be destroyed in short order.
|
|||
|
|
|
|||
|
|
This is a serious limiting factor in 1/4 wave Tesla systems.
|
|||
|
|
"Critical" or perfect coupling limits the amount of energy that
|
|||
|
|
can be processed through the system. Large toroid dischargers
|
|||
|
|
assist in unloading the secondary, and allow for closer coupling,
|
|||
|
|
but this is like treating the symptom, not effecting a cure.
|
|||
|
|
|
|||
|
|
The problem with the 1/4 wave coil system is that all of the
|
|||
|
|
energy processed in the system remains trapped in the secondary
|
|||
|
|
until it is removed by spark. As spark lengths and input powers
|
|||
|
|
grow, so do coupling problems. Strain is also put on the tank
|
|||
|
|
circuit. Energy can flow in both directions in the 1/4 wave
|
|||
|
|
system, and secondary energies can unload not only in spark from
|
|||
|
|
the discharge terminal, but can also flow back into the primary
|
|||
|
|
tank circuit. This results in nightmarish problems "quenching"
|
|||
|
|
the arc at the main system spark gaps. In theory no more than 50%
|
|||
|
|
of the input energy can be converted into discharge off the
|
|||
|
|
secondary air terminal, as both primary and secondary energies
|
|||
|
|
equalize before a break can be effected at the main system spark
|
|||
|
|
gap. Once the break (open, non-firing spark gap) is made, the
|
|||
|
|
secondary energy is trapped, and must be radiated or discharged.
|
|||
|
|
|
|||
|
|
Tesla realized that critical coupling limited the efficiency of
|
|||
|
|
the system, and came up with a unique solution. He added an
|
|||
|
|
"extra" coil to the secondary. The extra coil is a normal 1/4
|
|||
|
|
wave helical resonator, or Tesla secondary. The coil was placed
|
|||
|
|
away from any inductive effects of the primary/secondary "driver"
|
|||
|
|
coils, and was bottom fed by transmission line with the output of
|
|||
|
|
the driver secondary. Tesla was able to determine certain
|
|||
|
|
"harmonic" shifts in the system, but nobody else was able to
|
|||
|
|
figure out what was happening for years and years.
|
|||
|
|
|
|||
|
|
What is happening is this. In order for the "extra" coil to
|
|||
|
|
function properly it must be fed RF current that matches it's
|
|||
|
|
natural 1/4 wave frequency. In order to provide a working system,
|
|||
|
|
the output of the secondary driver coil in his three coil Mag-
|
|||
|
|
nifier must be shifted away from it's normal 1/4 wave output.
|
|||
|
|
|
|||
|
|
The normal 1/4 wave output (high voltage peak) of the Tesla
|
|||
|
|
secondary must be shifted to a lower harmonic in order for the
|
|||
|
|
extra coil to receive current. If you base fed an extra coil with
|
|||
|
|
1/4 wave voltage peaks, all you would get would be sparks from
|
|||
|
|
the transmission line, and a fire at the base of an extra coil
|
|||
|
|
(I've done it). Experiments, and review of Tesla work show that
|
|||
|
|
the 1/8 wave harmonic is preferred. The extra coil will cause
|
|||
|
|
some shifting of the driver coil output, but the system operates
|
|||
|
|
best when THE DRIVER COIL IS WOUND WITH THE PROPER LENGTH OF WIRE
|
|||
|
|
TO FACILITATE 1/8th WAVE OUTPUT.
|
|||
|
|
|
|||
|
|
This boosts efficiency in several ways. First, the energy in
|
|||
|
|
1/8th wave output is about 20% greater than the energy of a 1/4
|
|||
|
|
wave peak. The 1/8th wave location on the sine represents 70%
|
|||
|
|
of the wave energy, as opposed to 50% of the energy at the 1/4
|
|||
|
|
wave point; the 1/8 wave point being the product of both current
|
|||
|
|
and voltage at this location on the sine. While this may seem a
|
|||
|
|
little technical to the novice, a 20% gain is realized by
|
|||
|
|
shifting the output to the lower, 1/8th wave harmonic.
|
|||
|
|
|
|||
|
|
The second increase in efficiency is due to the fact that the
|
|||
|
|
secondary, or driver coil, is no longer responsible for the end
|
|||
|
|
processing of the system energy. The majority of the resonate
|
|||
|
|
rise, or VSWR, occurs in the uncoupled resonator located some
|
|||
|
|
distance away, and fed by transmission line. The secondary is no
|
|||
|
|
longer stressed by a high voltage point at the top of the coil,
|
|||
|
|
and the current produced in the secondary is removed rapidly by
|
|||
|
|
the transmission line to the end resonator (extra coil).
|
|||
|
|
|
|||
|
|
The third boost to efficiency is the ability to tighten the
|
|||
|
|
coupling between the primary and secondary driver set. The coils
|
|||
|
|
can be placed with much greater mutual inductance (tighter
|
|||
|
|
coupling). Energy can then be forced into the driver in much
|
|||
|
|
larger amounts without the problems of splitting and breakdown.
|
|||
|
|
The coils can be arranged more like two nested buckets, with one
|
|||
|
|
inside the other, as opposed to a phonograph record with an oats
|
|||
|
|
canister on top.
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
|
|||
|
|
SLUG-BBS_The Most Unreliable Feed in St. Louis!
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 201 Date: 10-30-93 09:55
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Guy Daughterty
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>THIS POST MAY BE A REPEAT. MY SYSOP INFORMED ME 10/29/93 THAT
|
|||
|
|
RQ>HE TURNED OFF ALL CONFERENCES FOR OUTGOING MAIL 10 DAYS AGO BY
|
|||
|
|
RQ>MISTAKE. WHAT A MESS!
|
|||
|
|
|
|||
|
|
GD> Well, yeah, Richard. We all think you're wacky, and keep
|
|||
|
|
GD> looking toward your direction on the planet waiting to see
|
|||
|
|
GD> the kaboom.
|
|||
|
|
|
|||
|
|
GD> So, once the atmosphere DOES light, how do we turn it off
|
|||
|
|
GD> again? -!-
|
|||
|
|
|
|||
|
|
On your last question: Turn off the switch. I use multiple
|
|||
|
|
interlocks in case one or two fuse closed. Had it happen on the
|
|||
|
|
arc welder current limiter once. When I opened the cabinet to
|
|||
|
|
repair the switch, I noticed the variable shunt was also stuck
|
|||
|
|
and there were signs of arcing. But it is an arc welder...
|
|||
|
|
|
|||
|
|
First remark: Keep looking. Probably won't be a kaboom though,
|
|||
|
|
more like a bazzzap. Obviously even you see the potential.
|
|||
|
|
|
|||
|
|
But if everybody thinks I'm wacky, should I stop posting? I don't
|
|||
|
|
want to waste people's time. I just thought you all were
|
|||
|
|
interested.
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 203 Date: 10-30-93 10:02
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Guy Daugherty
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>THIS POST MAY BE A REPEAT. MY SYSOP INFORMED ME 10/29/93
|
|||
|
|
RQ>THAT HE TURNED OFF ALL OUTGOING MAIL FROM OUR BOARD TO THE NET
|
|||
|
|
RQ>ABOUT 10 DAYS AGO BY MISTAKE. WHAT A MESS!
|
|||
|
|
|
|||
|
|
GD> Well I have a Jacob's ladder on an old theatre marquis neon
|
|||
|
|
GD> transformer. Really makes the kitty stop and pay attention.
|
|||
|
|
GD> Worries people who see it, too. My inner Beavis loves it.
|
|||
|
|
|
|||
|
|
Yeah, I have some videos of the pole pig settin on the garage
|
|||
|
|
floor with 3/8" copper pipe rails. Pulls arcs clear to the
|
|||
|
|
rafters. Running the tape in slo-mo shows plasmoids forming at
|
|||
|
|
power levels over 5KVA.
|
|||
|
|
|
|||
|
|
I have also messed with doping the rails with salts which modify
|
|||
|
|
the colors. You can get some pretty good Halloween effects with a
|
|||
|
|
couple of old neons and some strontium or lithium salts.
|
|||
|
|
|
|||
|
|
By the way Guy, what grade are you in?
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt INTO SYSOP!
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 210 Date: 10-30-93 16:13
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Dave,
|
|||
|
|
|
|||
|
|
I got your package in the mail today, and your tape went back
|
|||
|
|
out. It is after the pickup time on Saturday, but you should have
|
|||
|
|
the tape by midweek.
|
|||
|
|
|
|||
|
|
Let me know when you get it, and what you think. I am sorry I had
|
|||
|
|
to cut a lot of material out, but two hours just doesn't seem to
|
|||
|
|
be enough time to give you the tour, show you some techniques,
|
|||
|
|
and show all of the systems. I cut back on a lot of smaller test
|
|||
|
|
and prototype stuff to let you focus on the big coil.
|
|||
|
|
|
|||
|
|
If your interested in anything else, just let me know.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 419 Date: 11-01-93 10:21
|
|||
|
|
From: Guy Daugherty
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>But if everybody thinks I'm wacky, should I stop posting? I don't
|
|||
|
|
RQ>want to waste people's time. I just thought you all were
|
|||
|
|
RQ>interested.
|
|||
|
|
|
|||
|
|
I'd guess that the ones of us who are doing similar research are
|
|||
|
|
completely engrossed with your findings and research- I think it's
|
|||
|
|
interesting, though I fail to see the utility of what the devil it
|
|||
|
|
is you're up to, as opposed to my productive reduction of lifespan,
|
|||
|
|
i.e., posting smartass remarks in a few conferences and running up
|
|||
|
|
the phone bill for dozens of sysops across the globe. I'm curious
|
|||
|
|
what your end goal is, if you believe that even if you can prove
|
|||
|
|
Tesla's principles and concepts to have the validity his proponents
|
|||
|
|
trumpet, how could your break into the lockup current utility
|
|||
|
|
companies have over the conversion and distribution of electrical
|
|||
|
|
energy.
|
|||
|
|
|
|||
|
|
I have similar feelings about the use of dinosaur ooze for
|
|||
|
|
internal-combustion engine fuel --hydrogen would solve the
|
|||
|
|
pollution, supply limitation and toxicity problems-- but I have no
|
|||
|
|
fantasy of it coming to pass in my lifetime.
|
|||
|
|
|
|||
|
|
I say keep posting. We're interested. Plus, it narrows down
|
|||
|
|
the amount of territory we'll have to look for you in when
|
|||
|
|
something goes horriblly awry.
|
|||
|
|
-!-
|
|||
|
|
SLMR 2.1a Everybody's a dreamer, everybody's a
|
|||
|
|
star....
|
|||
|
|
|
|||
|
|
-!- GEcho 1.00
|
|||
|
|
! Origin: The Silhouetter bbs (209)472-0843 USR DS 16.8K
|
|||
|
|
(1:208/216)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 338 Date: 11-01-93 16:43
|
|||
|
|
From: Robert Taylor
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA TESLA COIL
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Wanted to pass along some reference material that may be of interest.
|
|||
|
|
In addition to the _Tesla, Man Out of Time_ book, Barnes & Noble also
|
|||
|
|
has _The Inventions, Researches, and Writings of Nikola Tesla_ (edited
|
|||
|
|
by Thomas Martin--ISBN 0-88029-812-X)--I picked this one up form them
|
|||
|
|
for about $15 w/in the last 6-9 months--think they still show it in
|
|||
|
|
their catalog.
|
|||
|
|
|
|||
|
|
The book is made up of transcripts of lectures & demonstrations given
|
|||
|
|
by Tesla, & several chapters are devoted to the coil & what he saw as
|
|||
|
|
its practical applications. Included are alot of technical details of
|
|||
|
|
his construction methods, as well as schematics. Unfortunately, there is
|
|||
|
|
nothing included as to the math that he used in design.
|
|||
|
|
|
|||
|
|
While looking at this thread, I noticed that someone made mention as to
|
|||
|
|
a variety of spark gap designs. Some of this is covered--including
|
|||
|
|
magnetic & compressed air quenching.
|
|||
|
|
|
|||
|
|
I did some fooling around with these designs a few years ago, but
|
|||
|
|
never got it to your level of development. Did not know the details
|
|||
|
|
of the oil-immersion cap at the time so I built a humongous Lleyden Jar
|
|||
|
|
cap for the tank circuit (after having blown up a ceramic high freq
|
|||
|
|
transmitter cap--not a pretty sight).
|
|||
|
|
|
|||
|
|
However, did discover that a good power supply is a plain ol' 15
|
|||
|
|
KV neon sign transformer (found some used ones at local sign shops).
|
|||
|
|
My biggest problem was working out the inductance--never could get
|
|||
|
|
the primary & secondary to sync properly--but it made one heckuva
|
|||
|
|
broad-band spark gap transmitter.
|
|||
|
|
|
|||
|
|
Still interested in Tesla & his work. Quite a mind there.
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- Maximus/2 2.00
|
|||
|
|
! Origin: BLUFF CITY BBS (1:123/70)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 409 Date: 11-03-93 13:43
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>Dave,
|
|||
|
|
|
|||
|
|
RQ>I got your package in the mail today, and your tape went back
|
|||
|
|
>out. It is after the pickup time on Saturday, but you should have
|
|||
|
|
>the tape by midweek.
|
|||
|
|
|
|||
|
|
RQ>Let me know when you get it, and what you think. I am sorry I had
|
|||
|
|
>to cut a lot of material out, but two hours just doesn't seem to
|
|||
|
|
>be enough time to give you the tour, show you some techniques,
|
|||
|
|
>and show all of the systems. I cut back on a lot of smaller test
|
|||
|
|
>and prototype stuff to let you focus on the big coil.
|
|||
|
|
|
|||
|
|
|
|||
|
|
GREAT! I will look forward to viewing it! Also, emphasis on the big
|
|||
|
|
coil is perfect.
|
|||
|
|
|
|||
|
|
TTYL - Dave <20>:-)
|
|||
|
|
b QMPro 1.51 b Tagline for mind readers:
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- WM v3.10/92-0434
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2529 Date:11-03-93 18:32
|
|||
|
|
From: Randy Mcvittie
|
|||
|
|
To: All
|
|||
|
|
Subj: diode detectors
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RM> I am wondering if anyone else has tried using run of the mill silicon
|
|||
|
|
|
|||
|
|
RM> diodes for measuring radiation. I have tried some diodes that I had
|
|||
|
|
RM> and I got a decent sized signal off of them and that got me to
|
|||
|
|
RM> wondering why the "Detector Diodes" cost so much, part of it is
|
|||
|
|
RM> gouging but for the most part electronics are VERY CHEAP to produce
|
|||
|
|
RM> once you get the process worked out.
|
|||
|
|
RM>
|
|||
|
|
RM> "Detector diodes" are like $500, the diode I used was about $0.05!
|
|||
|
|
RM>
|
|||
|
|
RM> For anyone wanting to try it out I used a plain 1N4007 and put my DVM
|
|||
|
|
RM> on it and then put the diode in a radiation field.
|
|||
|
|
RM>
|
|||
|
|
RM> 60KV 8.9 mVdc
|
|||
|
|
RM> 80KV 27 - 29 mVdc
|
|||
|
|
RM> 100KV 64 - 70 mVdc
|
|||
|
|
RM>
|
|||
|
|
RM> in a Cobalt 60 beam about 65mVdc
|
|||
|
|
RM>
|
|||
|
|
RM> On a Therac 20 High Energy Linear Accelerator
|
|||
|
|
RM>
|
|||
|
|
RM> 6MeV 348 - 239 mV (peak of pulses)
|
|||
|
|
RM> 9MeV 341 - 239 mV
|
|||
|
|
RM> 13MeV 403 - 350 mV
|
|||
|
|
RM> 17MeV 402 - 372 mV
|
|||
|
|
RM> X18MV 58 - 54 mV
|
|||
|
|
RM>
|
|||
|
|
RM>
|
|||
|
|
RM> I haven't done a lot of work on this yet, it just kind of hit me one
|
|||
|
|
RM> day that this could be worth a try.
|
|||
|
|
RM>
|
|||
|
|
RM> I haven't gone to the library yet to do a search but I'd appreciate
|
|||
|
|
RM> any info on this topic.
|
|||
|
|
RM>
|
|||
|
|
RM>
|
|||
|
|
RM> Cheers
|
|||
|
|
RM>
|
|||
|
|
RM> Randy....
|
|||
|
|
RM>
|
|||
|
|
RM>
|
|||
|
|
RM> ... OFFLINE 1.42 * We don't need no steenking tag lines...
|
|||
|
|
RM> -!- DlgQWK v0.71a/DLGMail
|
|||
|
|
RM> ! Origin: The Forge - 12 Lines, 2.3 Gig, 2xDHST, CD ROM (1:249/116)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 352 Date: 11-03-93 20:42
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Robert Taylor
|
|||
|
|
Subj: 10KVA TESLA COIL
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RT> Wanted to pass along some reference material that may be of
|
|||
|
|
RT> interest. In addition to the _Tesla, Man Out of Time_ book,
|
|||
|
|
RT> Barnes & Noble also has _The Inventions, Researches, and
|
|||
|
|
RT> Writings of Nikola Tesla_ (edited by Thomas Martin--ISBN
|
|||
|
|
RT> 0-88029-812-X)--I picked this one up from them for about $15
|
|||
|
|
RT> w/in the last 6-9 months--think they still show it in
|
|||
|
|
RT> their catalog. The book is made up of transcripts of
|
|||
|
|
RT> lectures & demonstrations given by Tesla, & several chapters
|
|||
|
|
RT> are devoted to the coil & what he saw as its practical
|
|||
|
|
RT> applications. Included are alot of technical details of
|
|||
|
|
RT> his construction methods, as well as schematics.
|
|||
|
|
RT> Unfortunately, there is nothing included as to the math that
|
|||
|
|
RT> he used in design.
|
|||
|
|
|
|||
|
|
Math? Tesla did not use math. Seriously. Oh, he used some
|
|||
|
|
equations to give ballpark figures. But the numbers he was
|
|||
|
|
working with were for the most part taken from machines he had
|
|||
|
|
already constructed and were operating. Most of the math was not
|
|||
|
|
figured out until years and years later. The mathmatical treatise
|
|||
|
|
on extra coil work was not drived until the 1980's, Sloans work
|
|||
|
|
on resonators (mathmatical treatise) was not published until the
|
|||
|
|
1930's. Tesla invented and built, he left the math for others to
|
|||
|
|
clean up later.
|
|||
|
|
|
|||
|
|
RT> While looking at this thread, I noticed that someone made
|
|||
|
|
RT> mention as to a variety of spark gap designs. Some of this
|
|||
|
|
RT> is covered--including magnetic & compressed air quenching.
|
|||
|
|
|
|||
|
|
The book is OK, but read it for generalities and direction only,
|
|||
|
|
outside of the schematics (which are his more primitve circuits)
|
|||
|
|
it should not be followed closely. We are in the age of plastics,
|
|||
|
|
and Tesla was in the age of wood, and rubber (carbon rich and a
|
|||
|
|
poor RF insulator). Some of the experiments are interesting, but
|
|||
|
|
I have performed many better ones that do not require $300.00
|
|||
|
|
(modern prices) custom made tubes.
|
|||
|
|
|
|||
|
|
RT> I did some fooling around with these designs a few years
|
|||
|
|
RT> ago, but never got it to your level of development. Did not
|
|||
|
|
RT> know the details of the oil-immersion cap at the time so I
|
|||
|
|
RT> built a humongous Lleyden Jar cap for the tank circuit
|
|||
|
|
RT> (after having blown up a ceramic high freq transmitter
|
|||
|
|
RT> cap--not a pretty sight).
|
|||
|
|
|
|||
|
|
Good capacitance is a must! I too have built many, many, homemade
|
|||
|
|
capacitors and leyden jars. Blew every one! Your not coiling
|
|||
|
|
unless your blowing capacitors! Then when you get things worked
|
|||
|
|
out to where the capacitors stop blowing, you start blowing
|
|||
|
|
transformers. By this time though your usually running well over
|
|||
|
|
a killowatt and are getting (or have seen) some decent spark.
|
|||
|
|
Then you start working with power controllers, and HEAVY RF
|
|||
|
|
choking, next thing you know your in the big leagues.
|
|||
|
|
|
|||
|
|
The best capacitors for beginners are salt water types. Bottles
|
|||
|
|
are filled with salt water, and placed in a salt water filled
|
|||
|
|
pan. The pan is lined with alum. foil, and a long bolt or some
|
|||
|
|
other conductor is placed in the bottle. The salt water in the
|
|||
|
|
pan is one plate, the salt water in the bottle is another plate,
|
|||
|
|
and the glass bottle is the dielectric. Oil can be poured over
|
|||
|
|
the water to reduce corona loss. Tesla used salt water caps on
|
|||
|
|
the Colorado Springs machine, and I have a friend running 5-8 KVA
|
|||
|
|
with plastic bucket salt water caps.
|
|||
|
|
|
|||
|
|
RT> However, did discover that a good power supply is a plain
|
|||
|
|
RT> ol' 15 KV neon sign transformer (found some used ones at
|
|||
|
|
RT> local sign shops).
|
|||
|
|
|
|||
|
|
I recommend beginners start with 9000 volt neons, then move up to
|
|||
|
|
12,000 volt units before jumping into the 15s. The 15KV neons put
|
|||
|
|
too much stress on the capacitors (unless you are using glass
|
|||
|
|
leyden jars, or salt water caps with thick bottles).
|
|||
|
|
|
|||
|
|
RT> My biggest problem was working out the inductance--never
|
|||
|
|
RT> could get the primary & secondary to sync properly--but it
|
|||
|
|
RT> made one heckuva broad-band spark gap transmitter.
|
|||
|
|
|
|||
|
|
You just needed to learn the ins and outs of tuning. It takes a
|
|||
|
|
little practice. A lot of balancing is required to get optimum
|
|||
|
|
performance. Coupling, spark gap quenching, terminal capacitance,
|
|||
|
|
as well as the primary/secondary inductance all come into play.
|
|||
|
|
Sounds like you made a good start, to bad you did not take it any
|
|||
|
|
further. Thinking about picking it up again? With modern
|
|||
|
|
materials, a little time and effort, and modern designs, you
|
|||
|
|
would be surprised what you can achieve with coils.
|
|||
|
|
|
|||
|
|
RT> Still interested in Tesla & his work. Quite a mind there.
|
|||
|
|
|
|||
|
|
Me too, and I agree. Tesla was a man very far ahead of his time
|
|||
|
|
and technology.
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 430 Rec'd Date: 11-03-93 22:00
|
|||
|
|
From: Bob Stephenson
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
> GD> Well I have a Jacob's ladder on an old theatre marquis neon
|
|||
|
|
> GD> transformer. Really makes the kitty stop and pay attention.
|
|||
|
|
> GD> Worries people who see it, too. My inner Beavis loves it.
|
|||
|
|
^^^^^^^^^^^^^^^
|
|||
|
|
|
|||
|
|
Oh man, I love it....Thank you!
|
|||
|
|
|
|||
|
|
Bob
|
|||
|
|
|
|||
|
|
-!- GEcho 1.00
|
|||
|
|
! Origin: Rock In A Hard Place - Teaneck, NJ (1:2604/109)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 482 Date: 11-04-93 05:00
|
|||
|
|
From: George Powell
|
|||
|
|
To: Robert Taylor
|
|||
|
|
Subj: Re: 10KVA TESLA COIL
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
> using neon xformers..
|
|||
|
|
|
|||
|
|
Do you have any probs with the xformers heating up after a while?
|
|||
|
|
Using one as a jacobs ladder tends to get it quite hot after a time.
|
|||
|
|
Although after all the years of use/abuse, it's still ticking away
|
|||
|
|
and works fine. Is high temp a normal thing for these neon units? The
|
|||
|
|
temp is uncomfortable to touch..
|
|||
|
|
|
|||
|
|
|
|||
|
|
Gp
|
|||
|
|
-!- Fruity Dog 6.0
|
|||
|
|
! Origin: Fruity Dog Support (1:2460/21)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 396 Date: 11-04-93 19:17
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Robert Taylor
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
BTW,
|
|||
|
|
|
|||
|
|
I have read the book you mentioned in the post received here
|
|||
|
|
yesterday. I bought it from Barnes & Nobel last month and have
|
|||
|
|
read it cover to cover twice.
|
|||
|
|
|
|||
|
|
The books I mentioned earlier, (example _NICKOLA TESLA ON HIS
|
|||
|
|
WORK WITH ALTERNATING CURRENTS AND THEIR APPLICATION TO WIRELESS
|
|||
|
|
TELEGRAPHY, TELEPHONY, AND TRANSMISSION OF POWER_ ISBN 0-9632652-
|
|||
|
|
0-2, from 21st Century Books, P.O. Box 2001, Breckenridge, Colo.
|
|||
|
|
80424) is a much more informative work.
|
|||
|
|
|
|||
|
|
Tesla did not go public with much after he saw the tide of his
|
|||
|
|
fortunes turning. He kept his more advanced work very close to
|
|||
|
|
his chest. Even his basic experimental circuits used in
|
|||
|
|
developing the Magnifier were not published until the 1970's, the
|
|||
|
|
math not worked out until late in the 1980's, and the systems
|
|||
|
|
actually re-tested (with the exception of Golka's primitive
|
|||
|
|
efforts) until the last two years! Right now work on the
|
|||
|
|
Magnifier is at the point where any serious hobbyist can make a
|
|||
|
|
mark.
|
|||
|
|
|
|||
|
|
The book above is a candid interview with Tesla's attorneys in
|
|||
|
|
1916 (after Wardenclyff), he talks, submits photographs,
|
|||
|
|
sketches, and schematics; all of which is recorded by
|
|||
|
|
stenographer. All documents submitted by Tesla are reproduced.
|
|||
|
|
|
|||
|
|
This book really cuts to the core. We see that Tesla used red
|
|||
|
|
herrings, even from the start, to disguise the true nature of his
|
|||
|
|
work. An example is his submission of photos and patent wrappers
|
|||
|
|
of an alternator. The alternator was patented (#447,920 March 10,
|
|||
|
|
1891) as the power supply in a "Method of Operating Arc Lamps".
|
|||
|
|
Yet Tesla goes on to produce schematics showing it as the signal
|
|||
|
|
generator for the first radio, AND shows how the circuit evolved
|
|||
|
|
in a matter of months into a powerful lumped tuned circuit
|
|||
|
|
transmitter.
|
|||
|
|
|
|||
|
|
He submits schematics of his experimental tank circuit used in
|
|||
|
|
the New York lab prior to leaving for Colorado Springs, complete
|
|||
|
|
with three phase synchronous gaps (never published or patented).
|
|||
|
|
We see photos taken from Wardenclyff powerplant showing huge four
|
|||
|
|
phase high frequency alternators, and text describing the
|
|||
|
|
operation and performance.
|
|||
|
|
|
|||
|
|
The Colorado Springs notes are another example of Tesla
|
|||
|
|
revelations. Tesla never intended those notes be published, and
|
|||
|
|
we see circuits in there that are meaningless, until you add
|
|||
|
|
perhaps a little note from the book mentioned top. We see the
|
|||
|
|
circuit that Tesla used to create ball lightning in the lab
|
|||
|
|
(Colorado Springs Notes pp 115,162), advancements made on the
|
|||
|
|
three phase gap (but not showing the gaps, just the improvement).
|
|||
|
|
|
|||
|
|
Then we add information gleaned from the Corums' book _VACUUM
|
|||
|
|
TUBE TESLA COILS_ (ISBN 0-924758-00-7) and we begin to see that
|
|||
|
|
his later claims of particle beam weapons, worldwide power
|
|||
|
|
transmission, robotics, etc. are not based on some "crackpot's
|
|||
|
|
fantasy" (as Guy Daugherty would have some believe).
|
|||
|
|
|
|||
|
|
He completed all of the basic research, had an operational
|
|||
|
|
worldwide transmitter (Wardenclyff, look at the powerplant
|
|||
|
|
photos) though nobody had receivers yet. He had operational
|
|||
|
|
remote control robots (ISBN 0-9632652-0-2, pp 157 {photo}, patent
|
|||
|
|
613,809 11/8/1898!).
|
|||
|
|
|
|||
|
|
I guess what I am trying to say is that his lectures, published
|
|||
|
|
explanations, even to some extent his patents are misleading, and
|
|||
|
|
deliberately so. You have to dig into sources that Tesla did not
|
|||
|
|
intend to become public, then you have to build and test these
|
|||
|
|
systems, then you are on the road to his later secrets. But they
|
|||
|
|
all seem to reach back to his 1/4 wave coil systems and the
|
|||
|
|
lectures, for the roots. The problem is that the work he
|
|||
|
|
presented in the lectures is now obsolete, both from a design and
|
|||
|
|
engineering point of view. With exception of some of the
|
|||
|
|
experiments, skip on to the material I have documented.
|
|||
|
|
-!-
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 559 Date: 11-04-93 20:28
|
|||
|
|
From: Mark Lawton @ 930/20
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10kva tesla coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>But if everybody thinks I'm wacky, should I stop posting? I don't
|
|||
|
|
RQ>want to waste people's time. I just thought you all were
|
|||
|
|
RQ>interested.
|
|||
|
|
|
|||
|
|
No! Keep the Tesla info comming. I've been building coils for 25+
|
|||
|
|
years. Your description of the magnifing coil is the best I've heard.
|
|||
|
|
|
|||
|
|
Before you burn a hole in the Earth, let me know, I want to get a
|
|||
|
|
picture of it! <g>
|
|||
|
|
|
|||
|
|
Mark Lawton 71740,2005
|
|||
|
|
|
|||
|
|
===
|
|||
|
|
* WinQwk 1.30 #279 * Bonehead Racing - Off-road ATV Champions
|
|||
|
|
|
|||
|
|
-!- InterPCB 1.50
|
|||
|
|
# Origin: Dallas Remote Imaging Group BBS 214-394-7438
|
|||
|
|
(8:930/20)
|
|||
|
|
! Origin: Gateway System to/from RBBS-NET (RBBS-PC 1:10/8)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 560 Date: 11-04-93 20:32
|
|||
|
|
From: Mark Lawton @ 930/20
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10kva tesla coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> GD> Well I have a Jacob's ladder on an old theatre marquis neon
|
|||
|
|
RQ> GD> transformer. Really makes the kitty stop and pay attention.
|
|||
|
|
RQ> GD> Worries people who see it, too. My inner Beavis loves it.
|
|||
|
|
RQ>
|
|||
|
|
RQ>Yeah, I have some videos of the pole pig settin on the garage
|
|||
|
|
RQ>floor with 3/8" copper pipe rails. Pulls arcs clear to the
|
|||
|
|
|
|||
|
|
Love it... Pole Pig = Jacob's Ladder
|
|||
|
|
|
|||
|
|
PS Does anyone need some neon transformers? I've got 3 collecting
|
|||
|
|
dust. (2) 7500V & (1) 15000V
|
|||
|
|
|
|||
|
|
ML
|
|||
|
|
|
|||
|
|
===
|
|||
|
|
* WinQwk 1.30 #279 * Bonehead Racing - Off-road ATV Champions
|
|||
|
|
|
|||
|
|
-!- InterPCB 1.50
|
|||
|
|
# Origin: Dallas Remote Imaging Group BBS 214-394-7438
|
|||
|
|
(8:930/20)
|
|||
|
|
! Origin: Gateway System to/from RBBS-NET (RBBS-PC 1:10/8)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 437 Date: 11-04-93 22:11
|
|||
|
|
From: David Tiefenbrunn
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
On 10-30-93 Richard Quick wrote to Guy Daughterty...
|
|||
|
|
|
|||
|
|
RQ> RQ>THIS POST MAY BE A REPEAT. MY SYSOP INFORMED ME 10/29/93 THAT
|
|||
|
|
I didn't see it before...
|
|||
|
|
|
|||
|
|
RQ> But if everybody thinks I'm wacky, should I stop posting? I don't
|
|||
|
|
RQ> want to waste people's time. I just thought you all were
|
|||
|
|
RQ> interested.
|
|||
|
|
|
|||
|
|
I'm interested. On another un-usual experimental topic,
|
|||
|
|
have you ever seen / read about / or heard of a rail gun?
|
|||
|
|
|
|||
|
|
Dave
|
|||
|
|
|
|||
|
|
___
|
|||
|
|
* OFFLINE 1.54 * Hey, is that thing SUPPOSED to smoke like that?
|
|||
|
|
|
|||
|
|
-!- Maximus 2.01wb
|
|||
|
|
! Origin: Abbey Road BBS Higganum, Ct. USA (1:320/5967)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 398 Date: 11-05-93 01:25
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: David Tiefenbrunn
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
Well Dave,
|
|||
|
|
|
|||
|
|
I talked with the architect again today. Things are firming up
|
|||
|
|
for a real lab.
|
|||
|
|
|
|||
|
|
The building so far is looking like this:
|
|||
|
|
|
|||
|
|
50' x 60' with 8' masonry walls and 8' sheet metal walls on top.
|
|||
|
|
This gives a total wall height of 16 feet, with a slope up to the
|
|||
|
|
center of the roof for a 20' peak.
|
|||
|
|
|
|||
|
|
The half masonry, half sheet metal wall was a compromise for
|
|||
|
|
security, cost, and you'll never guess what else... My testing
|
|||
|
|
shows an all metal walled building will induct, and large
|
|||
|
|
currents will cruise through the structure. So masonry for the
|
|||
|
|
first 8' feet seems a good compromise.
|
|||
|
|
|
|||
|
|
For electrical service I'm getting 480 volt 3 phase, 400 amps,
|
|||
|
|
and 110/220 single phase 200 amps.
|
|||
|
|
|
|||
|
|
The building will have 4" x 15' galvinized pipe driven into the
|
|||
|
|
ground before the slab is poured as an RF ground, and I plan to
|
|||
|
|
extend it later. Thought I would drop you a line and let you
|
|||
|
|
know, as I was pretty excited to see some drawings.
|
|||
|
|
-!-
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 05 Nov 93 02:22:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
If you are interested in making a high voltage, high current,
|
|||
|
|
power supply, I can tell you how to do it for free....
|
|||
|
|
|
|||
|
|
First call the local neon shop(s) and tell them that your working
|
|||
|
|
with Tesla coils. Ask them to hold all of their failed xfrmrs so
|
|||
|
|
you can pick them up. Make sure you talk to the boss or foreman,
|
|||
|
|
and tell them that you want dead units. I have never had a shop
|
|||
|
|
turn me down for free cores. They are happy to get rid of them.
|
|||
|
|
|
|||
|
|
There are two types of failed neon xfrmrs: warranty units, and
|
|||
|
|
old junk. The local shop must return units that fail within the
|
|||
|
|
two year warranty period back to the distributor for credit. Old
|
|||
|
|
junk (older than two years) you can pick up for free right from
|
|||
|
|
the local shop, but I also scavenge from the distributor. Ask
|
|||
|
|
where the failed warranty units go.
|
|||
|
|
|
|||
|
|
If you can locate the distributor who sells wholesale, and
|
|||
|
|
handles failed warranty units, you have found a gold mine of high
|
|||
|
|
voltage xfrmrs. The distributor removes the PLATE from the xfrmr
|
|||
|
|
for return to the manufacturer, and throws the unit away. The
|
|||
|
|
manufacturer credits the distributor for the plate, as the
|
|||
|
|
shipping is too expensive. The cores go to the dumpster.
|
|||
|
|
|
|||
|
|
After locating your source of failed units, be selective. Try to
|
|||
|
|
bring home the high current units. Ratings commonly used are 9
|
|||
|
|
kv, 12 kv, & 15 kv, with common current ratings of 30 & 60 ma.
|
|||
|
|
Once in awhile you will come across a 120 ma unit. I grab all
|
|||
|
|
of the high current units (60 ma+) I can get in these voltages.
|
|||
|
|
|
|||
|
|
First test your units. Use wire with a 15 kv rating or better.
|
|||
|
|
This wire can be obtained where you pick up the transformers.
|
|||
|
|
If you ask they will usually cut you off a few feet for free.
|
|||
|
|
I prefer using the solid polyethylene core from RG-213 coax, as
|
|||
|
|
it will withstand the voltage with gobs of extra safety margin.
|
|||
|
|
Draw an arc from the HV bushing to the case, one at a time.
|
|||
|
|
|
|||
|
|
About 50% of the "failed" units I pick up are just fine and need
|
|||
|
|
nothing other than a clean up. There is nothing wrong with them.
|
|||
|
|
Often shops get these units from signs they have dismantled, and
|
|||
|
|
they just toss them into the junk pile with the rest. The other
|
|||
|
|
50% are bad. Either one, or both, of the HV windings have broken
|
|||
|
|
down. These units can frequently be repaired.
|
|||
|
|
|
|||
|
|
Remove all hardware, and insulators if possible. Take a hammer
|
|||
|
|
and a chisel and remove the cases by splitting them down the
|
|||
|
|
corners. Break off any stubborn insulators, but try to preserve
|
|||
|
|
the lead wire. You are left with a block of tar. Set the unit
|
|||
|
|
outside when it is very cold, and let it freeze solid overnite.
|
|||
|
|
The next morning, short the high voltage lead wires with a clip
|
|||
|
|
lead, and connect 110 volts across the primary. Since the cores
|
|||
|
|
on these transformers are shunted, they may be shorted without
|
|||
|
|
harm or blowing fuses. Let the unit cook for 15-30 minutes.
|
|||
|
|
|
|||
|
|
Disconnect your leads, and with the chisel and hammer, chip a
|
|||
|
|
groove around the block. You want to score a groove lengthwise
|
|||
|
|
that will allow the block to cleave in two. Then starting from
|
|||
|
|
one end of the block, chip until you hit the core, then do the
|
|||
|
|
same with the other end. Pry and chip the tar away from the core
|
|||
|
|
until the xfrmr is free. The core may then be disassembled, and
|
|||
|
|
the windings removed and examined. Kerosene and a stiff brush
|
|||
|
|
will clean up the windings and core of any remaining tar.
|
|||
|
|
|
|||
|
|
The "cold-cook" method is fast, clean, and works very well. Since
|
|||
|
|
the tar is frozen it chips away cleanly. The "cooking" softens up
|
|||
|
|
the tar around the core allowing it to release. The only other
|
|||
|
|
ways I know to free the cores are long soaks in solvent such as
|
|||
|
|
kero or gas, (the nasty waste does make a good crack filler),
|
|||
|
|
or melting out the tar with external heat from a fire or oven.
|
|||
|
|
|
|||
|
|
Most units fail when the high voltage breaks down the tar insul-
|
|||
|
|
ation. The resulting carbon track shorts the winding. Simply
|
|||
|
|
removing the tar brings them back to life. Other times the coils
|
|||
|
|
break down internally. In this case I discard the winding after
|
|||
|
|
disassembling the core, and replace it with a good winding from
|
|||
|
|
another unit of the same model with the same type failure.
|
|||
|
|
|
|||
|
|
While the core is apart, you can beef up the current output by
|
|||
|
|
removing a few of the shunting plates between windings. Never
|
|||
|
|
take out more than 2 or 3 of these plates per side, as the
|
|||
|
|
additional power output will burn out the secondaries. Generally
|
|||
|
|
I get about 70-75 ma out of 60 ma units after I have finished.
|
|||
|
|
|
|||
|
|
Rebuilt units need a little protection from the high voltage
|
|||
|
|
secondary outputs. The first thing I do is solder on a new lead
|
|||
|
|
wire to the high voltage windings. The HV secondaries are wound
|
|||
|
|
with very fine magnet wire, in the 30 ma units the wire is not
|
|||
|
|
much thicker than a coarse hair. Once a good solder connection
|
|||
|
|
is made, bed the connection and the first 1/2 inch or so of lead
|
|||
|
|
wire to the top of the HV winding with hot glue or clear epoxy.
|
|||
|
|
The lead wire need not be anything special, any thin insulated
|
|||
|
|
stranded wire may be used. Heavy wire increases the chances of a
|
|||
|
|
failed connection due to mechanical stress. When setting the unit
|
|||
|
|
up to fire you simply have to route it on insulators.
|
|||
|
|
|
|||
|
|
The windings themselves are wedged against the core to prevent
|
|||
|
|
vibration. I have seen wood, bakelite, and plastic wedges used
|
|||
|
|
commercially. What I like to do is to soften up some 30 mil
|
|||
|
|
polyethylene plastic sheet in boiling water, and heat the core in
|
|||
|
|
a warm oven. I wrap dry softened plastic around the core and
|
|||
|
|
gently force the windings down on it. Once cooled, the windings
|
|||
|
|
have some insulation from the core, and they will not vibrate.
|
|||
|
|
|
|||
|
|
The base wire from the HV windings must be grounded to the core.
|
|||
|
|
Use the original grounding point if possible, if not you may
|
|||
|
|
split the core apart slightly with a thin blade and insert the
|
|||
|
|
wire into the gap before you clamp the core back up. If required
|
|||
|
|
you may splice on a small piece of wire for added length.
|
|||
|
|
|
|||
|
|
Neon sign transformers that have been rebuilt may be fired dry.
|
|||
|
|
The tar used to pot the cores for neon use does not really
|
|||
|
|
insulate well against the RF and kickback from the Tesla Tank.
|
|||
|
|
The units last longer when they are freed of the tar potting. The
|
|||
|
|
only other choice is to sink rebuilt units in mineral or xfrmr
|
|||
|
|
oil which is a very good RF insulator. I choose to fire them
|
|||
|
|
"dry"; it works, and there is no mess.
|
|||
|
|
|
|||
|
|
Neons may be run in parallel to deliver the current required to
|
|||
|
|
fire medium sized coils, and I have run up to 4000 watts with
|
|||
|
|
banked neon power supplies. The general practice is to run these
|
|||
|
|
banks off of 240 volt feeds controlled through a variac. Neons
|
|||
|
|
with matched outputs are run in pairs in these banks. The
|
|||
|
|
primaries are paired up in series, and the secondaries are all
|
|||
|
|
paralleled to the HV buss. Phasing is important here, and each
|
|||
|
|
transformer must be checked as it is added to the bank to ensure
|
|||
|
|
it is in phase with the other units. If an xfrmr draws an arc
|
|||
|
|
from a lead wire brought to the HV buss, the primary or secondary
|
|||
|
|
connections must be reversed.
|
|||
|
|
|
|||
|
|
Neons typically have an efficiency of about 50%, in that they
|
|||
|
|
draw twice as much power as they put out. This problem can be
|
|||
|
|
resolved with the use of power factor correction (pfc) capaci-
|
|||
|
|
tance across the line. The pfc capacitors used are the same as
|
|||
|
|
for alternating current motors. The voltage rating should be at
|
|||
|
|
least twice the line current used, and I like a 4x voltage margin
|
|||
|
|
for long life. The formula used to determine ballpark pfc is as
|
|||
|
|
follows:
|
|||
|
|
9
|
|||
|
|
10^
|
|||
|
|
C = Corrected kVA ------ 2
|
|||
|
|
2 f e^
|
|||
|
|
|
|||
|
|
This should read C = Corrected kVA times (10 to the ninth power)
|
|||
|
|
over, (2 pi times f times e squared)
|
|||
|
|
|
|||
|
|
C = required capacitance in microfarads
|
|||
|
|
f = frequency of applied voltage
|
|||
|
|
e = applied voltage
|
|||
|
|
|
|||
|
|
Corrected kVA is determined by dividing the volt*amps (watts)
|
|||
|
|
output of the neon sign xfrmr by 1000
|
|||
|
|
|
|||
|
|
Using a pair of rebuilt 12 kv, 60 ma neons, with 2 shunting
|
|||
|
|
plates removed from the core next to each HV winding, and power
|
|||
|
|
factor correction capacitance, you can get a nice 1.5 KVA Tesla
|
|||
|
|
power supply with over 90% efficiency. Total cost: $5.00 for the
|
|||
|
|
pfc capacitors, and a few hours of time.
|
|||
|
|
|
|||
|
|
I have unpotted dozens of neon transformers from many different
|
|||
|
|
manufacturers. I have tried to make this as informative as
|
|||
|
|
possible, and have checked it over for mistakes. If I have erred,
|
|||
|
|
or was not clear on something, please let me know. Use common
|
|||
|
|
sense, and don't expect the first attempt to work out. On my
|
|||
|
|
first attempt I managed to destroy a HV winding during the
|
|||
|
|
unpotting, as I did not know where the windings were located on
|
|||
|
|
the core. But once you see one core unpotted, with minor
|
|||
|
|
differences, you have seen them all.
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 441 Date: 11-06-93 19:22
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: David Tiefenbrunn
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
DT> I'm interested. On another un-usual experimental topic,
|
|||
|
|
DT> have you ever seen / read about / or heard of a rail gun?
|
|||
|
|
|
|||
|
|
Sure, two different types.
|
|||
|
|
|
|||
|
|
Steve Hanson runs a particle accelerator rail gun in his
|
|||
|
|
basement. It is small, but it cooks!
|
|||
|
|
|
|||
|
|
He has extensive vacuum equipment, and the basic setup looks like
|
|||
|
|
this:
|
|||
|
|
|
|||
|
|
Two copper rods form the rails. They are set up in parallel bar
|
|||
|
|
fashion with the bases mounted in an insulator block. At the base
|
|||
|
|
of the rods, near the insulator, he wraps a tungsten filament
|
|||
|
|
removed from a common light bulb. He places a glass cylinder,
|
|||
|
|
like an elongated bell jar, with a target mounted in the closed
|
|||
|
|
end, over the rails. The jar is sealed at the base and pumped
|
|||
|
|
down to a hard vacuum.
|
|||
|
|
|
|||
|
|
Two high current lead wires are connected to the rails. They are
|
|||
|
|
epoxied into the insulator base so as to be air tight. He takes a
|
|||
|
|
HVDC power supply and charges a massive capacitor bank. He throws
|
|||
|
|
the switch, and BANG! the tungsten is vaporized.
|
|||
|
|
|
|||
|
|
The plasma is highly conductive, and maintains a current flow
|
|||
|
|
between the rails. The high current produces electro-magnetic
|
|||
|
|
force which propels the plasma under high acceleration down the
|
|||
|
|
rails and into the target. A regular microscope shows the plasma
|
|||
|
|
impact damage on plate glass targets. It really sinks the
|
|||
|
|
tungsten into the material.
|
|||
|
|
|
|||
|
|
Steve publishes a journal in which he covers his work. You may
|
|||
|
|
write to him at: 35 Windsor Drive, Amherst, NH. 03031.
|
|||
|
|
|
|||
|
|
The other type of rail gun uses a monorail system. A "bullet" of
|
|||
|
|
conductive material is loaded onto a single nonconducting rail
|
|||
|
|
surrounded by heavy coils. The coils are energized by a timed
|
|||
|
|
capacitive discharge. A special rotary gap with varied spaced
|
|||
|
|
electrodes may be used, but recent work points to computers to
|
|||
|
|
control to pulses. Timing is most critical.
|
|||
|
|
|
|||
|
|
The heavy current flow through a coil induces a current in any
|
|||
|
|
conductive material, in this case the projectile. The circulating
|
|||
|
|
currents in the projectile produce a magnetic field, which repels
|
|||
|
|
it from the coil. As it passes the next coil down the rail, the
|
|||
|
|
second coil is pulsed and so on. Since the current and voltage
|
|||
|
|
from the capacitive discharge is high, the forces imparted to the
|
|||
|
|
projectile are great. I believe the speed of sound has been
|
|||
|
|
broken by projectiles from small "hobby" guns.
|
|||
|
|
|
|||
|
|
I have not had contact with a working monorail gun. I have seen
|
|||
|
|
several photos. Information Unlimited, P.O. Box 716, Amherst, NH.
|
|||
|
|
03031, tel: 603-673-4730 (9-5) may have additional information on
|
|||
|
|
monorail guns of this type.
|
|||
|
|
|
|||
|
|
Then there is this guy in California with a multi-gigawatt Taser
|
|||
|
|
gun....
|
|||
|
|
|
|||
|
|
The commonality of these systems is capacitive discharge, and
|
|||
|
|
power supplies. You must have HV pulse discharging capacitors and
|
|||
|
|
a high current, high voltage, power supply to experiment in these
|
|||
|
|
areas.
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 4 Date: 07 Nov 93 02:03:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Guy Daugherty
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
GD> I'm curious what your end goal is, if you believe that even
|
|||
|
|
GD> if you can prove Tesla's principles and concepts to have the
|
|||
|
|
GD> validity his proponents trumpet, how could your break into
|
|||
|
|
GD> the lockup current utility companies have over the
|
|||
|
|
GD> conversion and distribution of electrical energy.
|
|||
|
|
|
|||
|
|
We may never see this one, even if commercial feasibility is
|
|||
|
|
proven. But you are taking a bit of a narrow view, that is all.
|
|||
|
|
My personal goal is not only to prove Tesla's principals and
|
|||
|
|
concepts (which I believe has already done as far as his patents
|
|||
|
|
are concerned), but also for the pure search of knowledge.
|
|||
|
|
Practical applications, something I think may be possible to
|
|||
|
|
achieve, would be perhaps a true "high efficiency" laser. If we
|
|||
|
|
have one, then someone will figure out how to employ it for
|
|||
|
|
profit, maybe in fusion. Me, I am looking to spend money with
|
|||
|
|
this, not make it.
|
|||
|
|
|
|||
|
|
You must be misunderstanding the breakthrough that the Magnifier
|
|||
|
|
circuit represents. Just because Tesla saw one commercial
|
|||
|
|
application for the circuit in a transmitter does not mean that
|
|||
|
|
this is the only single use, or the only use Tesla saw. This is
|
|||
|
|
definately not the case. The circuit is a very, very, very
|
|||
|
|
efficient RF power supply. It can be set up to provide RF
|
|||
|
|
current, or voltage (or both) depending on the intended app-
|
|||
|
|
lication. As a power supply for large tuned resonate loads there
|
|||
|
|
is nothing equal. In effect the circuit is narrow band RF signal
|
|||
|
|
generator capable of enormous powers. It is relatively cheap and
|
|||
|
|
easy to build, and the design and components are easily modified.
|
|||
|
|
|
|||
|
|
The Magnifier was not recognized as a high efficiency, narrow
|
|||
|
|
band signal generator until the mid 1980's; 90 years after Tesla
|
|||
|
|
had industrial scale operational units, and a full ten years
|
|||
|
|
after Tesla's Colorado Springs Notes went into print for the
|
|||
|
|
first time. The photos published at the time (early 1900s)
|
|||
|
|
only show, and the only thing people remember, are the sparks.
|
|||
|
|
Yet in the opening pages of the Notes, Tesla clearly stated his
|
|||
|
|
intended goals for the machine, he does not mention sparks.
|
|||
|
|
|
|||
|
|
In an era with no o'scopes, multimeters, RF detectors, or
|
|||
|
|
stabilized RF generators (other than his); Tesla proceeded to
|
|||
|
|
design, construct, and test, a narrow band RF signal generator
|
|||
|
|
driving a tuned 1/4 wave resonate load to a voltage of 9.5
|
|||
|
|
Megavolts with RMS currents of 1100 amps. Figure it out Guy,
|
|||
|
|
thats 10.45 Billion watts. He did this with an input power
|
|||
|
|
of 250 kVA, and so named the circuit "The Magnifier". The only
|
|||
|
|
way he could judge the performance of the system was to tune for
|
|||
|
|
spark occasionally.
|
|||
|
|
|
|||
|
|
The reason the system was so large was because physical size was
|
|||
|
|
the only way to contain the energy in the system without break-
|
|||
|
|
down. He had to keep his charge density low or he lost energy. He
|
|||
|
|
did not have plastic film type pulse discharge capacitors, poly-
|
|||
|
|
ethylene core coax, PVC jacketed wire, or any of the dozens
|
|||
|
|
of other modern materials I use daily.
|
|||
|
|
|
|||
|
|
When Tesla perfected the circuit, the only 1/4 wave resonator
|
|||
|
|
in existance was the resonate coil. We now have coaxial, tapped
|
|||
|
|
helix coaxial, and pure cavity geometries. Tesla never mentioned
|
|||
|
|
coherant radiation, and now we have lasers and masers. The
|
|||
|
|
Kapitza fusion experiment and the maser are examples of modern
|
|||
|
|
applications of resonate loads. Both are cavity type 1/4 wave
|
|||
|
|
resonators driven by signal generators.
|
|||
|
|
|
|||
|
|
In my recent research I ran across an article, "Cavity-Coupling
|
|||
|
|
Investigation for the Phermex 50 MHz RF Accelerator", by E.W.
|
|||
|
|
Pogue and F.R. Buskirk, IEEE Trans. on Nuclear Science, Vol. NS-
|
|||
|
|
32, No. 5, October, 1985, pp 2852-2853.
|
|||
|
|
|
|||
|
|
The boys at Phermex seemed really excited to discover an increase
|
|||
|
|
of performace in the accelerator when run off parallel drivers.
|
|||
|
|
Yet Tesla shows the SAME IDENTICAL CIRCUIT, and at least three
|
|||
|
|
variations, with notes relative to the performance and character-
|
|||
|
|
istics of each in The Colorado Springs Notes in 1899!
|
|||
|
|
See Colorado Springs Notes, pp 153-156, mid August 1899.
|
|||
|
|
|
|||
|
|
The circuit is precisely identical, the only differences being
|
|||
|
|
the frequency of operation and the geometries of the resonator.
|
|||
|
|
Tesla BTW was running powers an order of MAGNITUDE greater
|
|||
|
|
the the Phermex team.
|
|||
|
|
|
|||
|
|
The magnifier is a very efficient signal generator, NOT a
|
|||
|
|
transmitter unless you CHOOSE to set it up as one. The entire
|
|||
|
|
purpose behind the magnifier circuit, it's only true function, is
|
|||
|
|
to drive resonators, not to transmit power.
|
|||
|
|
|
|||
|
|
So lets forget the sparks for a moment, and lets forget global
|
|||
|
|
transmission of power. Why not hook the system to a tuned 1/4
|
|||
|
|
wave resonator designed as a laser tube? A system 1/10th the
|
|||
|
|
power of Tesla's Colorado Springs oscillator would deliver a
|
|||
|
|
billion watts. With modern materials the size could be reduced
|
|||
|
|
greatly because we can insulate with plastics. In real dollars
|
|||
|
|
the cost is cheaper than Tesla's because we can tap the
|
|||
|
|
industrial surplus markets, transformers he paid thousands for
|
|||
|
|
then, I can buy surplus for a few hundred.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 633 Date: 11-07-93 12:15
|
|||
|
|
From: Guy Daugherty
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>I talked with the architect again today. Things are firming up
|
|||
|
|
RQ>for a real lab.
|
|||
|
|
|
|||
|
|
RQ>The building so far is looking like this:
|
|||
|
|
|
|||
|
|
RQ>50' x 60' with 8' masonry walls and 8' sheet metal walls on top.
|
|||
|
|
RQ>This gives a total wall height of 16 feet, with a slope up to the
|
|||
|
|
RQ>center of the roof for a 20' peak.
|
|||
|
|
|
|||
|
|
This is geting out of hand, Richard.
|
|||
|
|
-!-
|
|||
|
|
SLMR 2.1a You, you, and you panic. The rest of you, come
|
|||
|
|
with me.
|
|||
|
|
|
|||
|
|
-!- GEcho 1.00
|
|||
|
|
! Origin: The Silhouetter bbs (209)472-0843 USR DS 16.8K
|
|||
|
|
(1:208/216)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 634 Date: 11-07-93 12:48
|
|||
|
|
From: Guy Daugherty
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> GD> I'm curious what your end goal is, if you believe that even
|
|||
|
|
RQ> GD> if you can prove Tesla's principles and concepts to have the
|
|||
|
|
RQ> GD> validity his proponents trumpet, how could your break into
|
|||
|
|
RQ> GD> the lockup current utility companies have over the
|
|||
|
|
RQ> GD> conversion and distribution of electrical energy.
|
|||
|
|
|
|||
|
|
RQ>We may never see this one, even if commercial feasibility is
|
|||
|
|
RQ>proven. But you are taking a bit of a narrow view, that is all.
|
|||
|
|
|
|||
|
|
Narrow view? Me? That'll shock 'em.
|
|||
|
|
|
|||
|
|
RQ>My personal goal is not only to prove Tesla's principals and
|
|||
|
|
RQ>concepts (which I believe has already done as far as his patents
|
|||
|
|
RQ>are concerned), but also for the pure search of knowledge.
|
|||
|
|
RQ>Practical applications, something I think may be possible to
|
|||
|
|
RQ>achieve, would be perhaps a true "high efficiency" laser. If we
|
|||
|
|
RQ>have one, then someone will figure out how to employ it for
|
|||
|
|
RQ>profit, maybe in fusion. Me, I am looking to spend money with
|
|||
|
|
RQ>this, not make it.
|
|||
|
|
|
|||
|
|
Well, now you've stumbled onto MY area of expertise. Send me a
|
|||
|
|
signed check and I'll show you some pointers...
|
|||
|
|
-!-
|
|||
|
|
SLMR 2.1a The less you bet, the more you lose when you
|
|||
|
|
win.
|
|||
|
|
|
|||
|
|
-!- GEcho 1.00
|
|||
|
|
! Origin: The Silhouetter bbs (209)472-0843 USR DS 16.8K
|
|||
|
|
(1:208/216)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 07 Nov 93 16:14:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
DH> Hi Richard - again, thanks for the fantastic video! Loaned
|
|||
|
|
DH> it to my dad this morning - he used to teach physics ( still
|
|||
|
|
DH> writes textbooks ) and is a Tesla fan too...
|
|||
|
|
|
|||
|
|
DH> Anyway, I was wondering how you went about getting your pole
|
|||
|
|
DH> pig - line xfrmr - and how much it set you back... I called
|
|||
|
|
DH> our local City Light and they cannot sell them because of
|
|||
|
|
DH> the EPA regulations. They actually ship them to some company
|
|||
|
|
DH> overseas for salvage... I will try some of the smaller PUD's
|
|||
|
|
DH> and see if they are not so "Politically Correct" <grin>
|
|||
|
|
|
|||
|
|
Well you can try the utilities, I did, with no luck:-( Unless you
|
|||
|
|
are willing to climb the fence into their transfer yard and climb
|
|||
|
|
back out, in the dark, with a 200+ lb. pole pig under your arm,
|
|||
|
|
you will not get one there :-) I bought mine from:
|
|||
|
|
|
|||
|
|
Larry J. Rebman
|
|||
|
|
The Transformer Bank, Inc.
|
|||
|
|
University Technology Center
|
|||
|
|
1313 Fifth St. SE
|
|||
|
|
Minneapolis, MN 55415
|
|||
|
|
|
|||
|
|
Tel: (612) 379-3958, Fax: (612) 379-5962
|
|||
|
|
|
|||
|
|
The transformers they sell are brand new GE surplus, certified
|
|||
|
|
PCB free. GE manufactures at their plant in Hanover, North
|
|||
|
|
Carolina. Unsold units sit in the yard, and on GE's balance
|
|||
|
|
sheet, for 5 years and depreciate. Once GE has depreciated them
|
|||
|
|
to zero, The Transformer Bank buys them for 50 cents a pound.
|
|||
|
|
|
|||
|
|
The Transformer Bank enters all of the plate information from
|
|||
|
|
these surplus pigs into their database in Minneapolis. They will
|
|||
|
|
fax you the plate specs on any surplus pig in the Hanover yard.
|
|||
|
|
Once you have chosen the xfrmr you want by comparing a few plate
|
|||
|
|
specs, call them for a price, then send them a certified check.
|
|||
|
|
The retail cost is a little over $1.00 a pound, so figure a 230
|
|||
|
|
pound, 10 KVA xfrmr, will run about $250.00.
|
|||
|
|
|
|||
|
|
The Transformer Bank has a shipping contract with Consolidated
|
|||
|
|
Freightways. The units are shipped directly from the Hanover
|
|||
|
|
yard. The contractual rate is about 50% the normal retail rate,
|
|||
|
|
and the Transformer Bank passes the entire savings on to the
|
|||
|
|
customer. Figure about $50.00 shipping per 250 pounds.
|
|||
|
|
|
|||
|
|
My pole pig ran $303.00, including shipping, and was delivered to
|
|||
|
|
me ten days from the date I dropped the certified check in the
|
|||
|
|
mail to Minneapolis. It arrived still strapped on the original
|
|||
|
|
pallet, and it had no dings, dents or chips. The pallet was
|
|||
|
|
heavily weathered as one would expect, but once the pig was
|
|||
|
|
cleaned up, it looked (and is) brand new.
|
|||
|
|
|
|||
|
|
The unit came with certification papers that match the serial
|
|||
|
|
number on the plate, showing it to be PCB free. Copies of the
|
|||
|
|
certification are on file with GE, so disposal or transfer of
|
|||
|
|
the pig will not be a problem.
|
|||
|
|
|
|||
|
|
In shopping for a pig, you should be looking for a unit with two
|
|||
|
|
high voltage bushings, no taps, 120/240 primary, and a secondary
|
|||
|
|
voltage of 14,400 volts or higher. Remember! I am accustomed to
|
|||
|
|
running pigs backwards! You will always see me refer to inputs
|
|||
|
|
and outputs in reverse of utility pratcice when I talk about
|
|||
|
|
pigs. Thus my "primary" is the actual secondary, and v.v..
|
|||
|
|
|
|||
|
|
The kVA rating on pigs are of course for continous duty. They
|
|||
|
|
will run 24-7 at the plate rating and not warm appreciably. You
|
|||
|
|
may run them at twice the rated kVA output for 5 min or so
|
|||
|
|
without any problem. 10 kVA seems to be a nice size for high
|
|||
|
|
powered Tesla work. The 15 kVA pigs have a substantially larger
|
|||
|
|
core, and require more energy to energize.
|
|||
|
|
|
|||
|
|
Since the cores on these are shell wound, you will not encounter
|
|||
|
|
appreciable core saturation. These units must be run with a heavy
|
|||
|
|
current limiter or they will pull the entire neighborhood into
|
|||
|
|
your experiment. You should be able to energize them without
|
|||
|
|
dimming the lights. Due the the heavy current limiting required,
|
|||
|
|
your input and output voltage will be lower than your line. My
|
|||
|
|
10 kVA pig has a rated output of 23,890 volts, but with current
|
|||
|
|
limiting, the calulated output is closer to 20,000 volts.
|
|||
|
|
|
|||
|
|
Both resitive and inductive current limiting may be used. The
|
|||
|
|
inductive delay (about 1 sec.) in the current limiter and variacs
|
|||
|
|
make control pretty jumpy, so it is best to use at least some
|
|||
|
|
resistive ballast to smooth things out, especially if you are not
|
|||
|
|
accustomed to these powers. The smoothest coils use all resistive
|
|||
|
|
ballast, but things get pretty hot. The best combination seems to
|
|||
|
|
be 6 or more paralleled oven elements placed in series with an
|
|||
|
|
inductor. I opted for pure inductance because I hate to waste
|
|||
|
|
energy as heat, but I feel the tug on my variacs through the
|
|||
|
|
control wheel, and Gary has seen some arcing in the variac
|
|||
|
|
brushes when the current limiter finally lets loose. When I add
|
|||
|
|
some resistive ballast these problems are eliminated.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 463 Date: 11-07-93 23:46
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
> CORRECTION!
|
|||
|
|
|
|||
|
|
I posted a formula for power factor correction capacitance
|
|||
|
|
in magnetic shunted neon sign transformers the other day. As my
|
|||
|
|
word processor was formatting the pages for a DOS text save the
|
|||
|
|
formula apparently got messed up. The ASCII character "pi" was
|
|||
|
|
stripped, and formula was more or less "disassembled". The text
|
|||
|
|
below the formula in the original post reads correctly, and the
|
|||
|
|
formula should look like this:
|
|||
|
|
9
|
|||
|
|
10^
|
|||
|
|
C = Corrected kVA ------ 2
|
|||
|
|
2 f e^
|
|||
|
|
|
|||
|
|
That is C = Corrected kVA * (10 to the ninth)
|
|||
|
|
over (2 pi * f * e squared)
|
|||
|
|
|
|||
|
|
Where C = capacitance required in microfarads
|
|||
|
|
f = frequency of applied voltage
|
|||
|
|
e = the applied voltage
|
|||
|
|
Corrected kVA is the Volt*Amps (watts) output divided by 1000.
|
|||
|
|
|
|||
|
|
I apologize for any inconvenience!
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 522 Date: 11-08-93 00:07
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: George Powell
|
|||
|
|
Subj: Re: 10KVA TESLA COIL
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
> using neon xformers..
|
|||
|
|
|
|||
|
|
GP> Do you have any probs with the xformers heating up after a
|
|||
|
|
GP> while? Using one as a jacobs ladder tends to get it quite
|
|||
|
|
GP> hot after a time. Although after all the years of use/abuse,
|
|||
|
|
GP> it's still ticking away and works fine. Is high temp a
|
|||
|
|
GP> normal thing for these neon units? The temp is uncomfortable
|
|||
|
|
GP> to touch..
|
|||
|
|
|
|||
|
|
No it shouldn't really bother them. Neon sign xfrmrs have a low
|
|||
|
|
power factor due to poor regulation. This condition is purposely
|
|||
|
|
built into the xfrmr so that the current output can be
|
|||
|
|
controlled. This limitation prevents burn-out of the secondary
|
|||
|
|
windings. Consequently, the secondary of a neon sign transformer
|
|||
|
|
can be short-circuited without harm.
|
|||
|
|
|
|||
|
|
The poor regulation can be traced to the magnetic shunt. The
|
|||
|
|
shunt acts acts to draw the magnetic flux away from the secondary
|
|||
|
|
coil. Transformers of this type are often called "magnetic
|
|||
|
|
leakage xfrmrs".
|
|||
|
|
|
|||
|
|
As the current in the magnetic leakage xfrmr increases, more and
|
|||
|
|
more of the magnetic lines are bypassed through the shunt. As a
|
|||
|
|
result, fewer magnetic lines reach the secondary windings.
|
|||
|
|
Consequently, as more current is drawn, less voltage is produced.
|
|||
|
|
|
|||
|
|
Under load, the efficiency of these type xfrmrs is around 50%.
|
|||
|
|
Half of the energy is bypassed through the shunt, and is
|
|||
|
|
converted into heat. These units get hot as a result, but are
|
|||
|
|
normally rated for continous duty. Unless the tar starts bubbling
|
|||
|
|
out (indications of a problem in the primary coil) they should be
|
|||
|
|
just fine.
|
|||
|
|
|
|||
|
|
I just posted instructions on how to increase the performance of
|
|||
|
|
these xfrmrs from 50% to around 90% by unpotting, removing a
|
|||
|
|
couple of shunt plates from each secondary winding, and using
|
|||
|
|
power correction capacitance on the input line. They not only
|
|||
|
|
put out more power, but the input current is reduced by nearly
|
|||
|
|
50%, and they don't get nearly so hot...
|
|||
|
|
|
|||
|
|
Yet they are still limited, and may be used for jacobs ladders.
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 570 Date: 11-08-93 11:07
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>I talked with the architect again today. Things are firming up
|
|||
|
|
>for a real lab.
|
|||
|
|
|
|||
|
|
RQ>The building so far is looking like this:
|
|||
|
|
|
|||
|
|
RQ>50' x 60' with 8' masonry walls and 8' sheet metal walls on top.
|
|||
|
|
>This gives a total wall height of 16 feet, with a slope up to the
|
|||
|
|
>center of the roof for a 20' peak.
|
|||
|
|
|
|||
|
|
WOW! Do you plan to do shows? You could charge admission.
|
|||
|
|
|
|||
|
|
Sounds fantastic!
|
|||
|
|
|
|||
|
|
b QMPro 1.51 b Avoid polysyllabification...
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- WM v3.10/92-0434
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 599 Date: 11-08-93 11:08
|
|||
|
|
From: Robert Taylor
|
|||
|
|
To: George Powell
|
|||
|
|
Subj: Re: 10KVA TESLA COIL
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> Quoting George Powell to Robert Taylor <=-
|
|||
|
|
|
|||
|
|
> using neon xformers..
|
|||
|
|
|
|||
|
|
GP> Do you have any probs with the xformers heating up after a while?
|
|||
|
|
|
|||
|
|
To be honest--has been a while since I've had my xformers to play with.
|
|||
|
|
But as I remember, the Jacob's Ladder hook-up didn't cause any unusual
|
|||
|
|
overheat. You might check the size of your initiating gap at the bottom
|
|||
|
|
of the ladder. If it's too close--it will put extra strain on the
|
|||
|
|
xformer.
|
|||
|
|
|
|||
|
|
One thought--if your xformer is in a small case, the overheat may be
|
|||
|
|
natural. The ones that I used were fairly big monsters that weighed
|
|||
|
|
in at about 20 lbs.
|
|||
|
|
|
|||
|
|
If yours is in a case about 5" high by about 10" long--then yours may
|
|||
|
|
be prone to overheating. However, if you have any questions as to
|
|||
|
|
your coil's integrity try using a VOM or continuity tester on both the
|
|||
|
|
secondary & primary & the case to make sure that there are no obvious
|
|||
|
|
shorts. A serious overheat can really test your fire insurance.
|
|||
|
|
|
|||
|
|
You might also want to hook your VOM up on the primary side & monitor
|
|||
|
|
your current draw (should be some specs on the case as to 120 VAC draw).
|
|||
|
|
If you see way-out draws or if the draw starts up w/ time--then you may
|
|||
|
|
have a problem w/ the windings.
|
|||
|
|
|
|||
|
|
Hope this helps you out.
|
|||
|
|
|
|||
|
|
Robert
|
|||
|
|
|
|||
|
|
... ZZAPP! Another one bites the dust!
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
-!- Maximus/2 2.00
|
|||
|
|
! Origin: BLUFF CITY BBS (1:123/70)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2726 Date:11-10-93 12:15
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> SEZ Dave Halliday to Richard Quick 'bout Tesla Video <=-
|
|||
|
|
|
|||
|
|
RQ> sections of my preliminary Magnifier work, which I encourage
|
|||
|
|
RQ> others to follow up on. If you and your friends decide to
|
|||
|
|
RQ> take on
|
|||
|
|
|
|||
|
|
DH> That was at the beginning - fascinating because I was
|
|||
|
|
DH> completely un-aware that the other coil was involved - I
|
|||
|
|
DH> just thought it was part of the background because I could
|
|||
|
|
DH> not see any arcs coming from it.
|
|||
|
|
|
|||
|
|
DH> Very interesting that so much of the energy from it could be
|
|||
|
|
DH> so closely coupled to the second coil... This will be a fun
|
|||
|
|
DH> winter project!!!
|
|||
|
|
|
|||
|
|
The "extra coil" is completely uncoupled from the driver system.
|
|||
|
|
Current from the driver is being fed into the base of the free
|
|||
|
|
standing "extra" coil by transmission line. While you are not
|
|||
|
|
able to see in the video... The transmission line glows with
|
|||
|
|
corona from the heavy current.
|
|||
|
|
|
|||
|
|
DH> I was talking with one of the people and they agreed to
|
|||
|
|
DH> start on a smaller coil - I was thinking in the order of 4"
|
|||
|
|
DH> diameter and about 3' long.
|
|||
|
|
|
|||
|
|
The aspect ratio (height to width ratio) is important. The
|
|||
|
|
planned coil has an aspect ratio of 9:1 (36" long, 4" diam.)
|
|||
|
|
this should be reduced to no more than 5:1 on a 4" diam. coil.
|
|||
|
|
6" coils work best with 4:1 aspect ratio, anything larger 3:1.
|
|||
|
|
|
|||
|
|
DH> The vacuum gap looked easy enough to build.
|
|||
|
|
|
|||
|
|
This gap underwent about two weeks of prototyping not shown in
|
|||
|
|
the video, but once it was working, it worked great. It has
|
|||
|
|
trouble at power levels over 5 kVA. After an evening on the big
|
|||
|
|
coil at 8 to 10 kVA I had some pitting and melting of the
|
|||
|
|
electrode faces. This was reduced as I cut back on the number of
|
|||
|
|
electrodes, increased the size (both length and diam.) of the
|
|||
|
|
electrodes, and allowed for a larger gap between electrodes.
|
|||
|
|
|
|||
|
|
DH> file about building a capacitor also looks pretty
|
|||
|
|
DH> straightforward. I guess the main deal there is just to be
|
|||
|
|
DH> patient and very careful. I have a vacuum pump so getting
|
|||
|
|
DH> all the air bubbles out of it should be pretty
|
|||
|
|
DH> straightforward.
|
|||
|
|
|
|||
|
|
These homemade capacitors are high Q, reliable, and relatively
|
|||
|
|
easy to build. Pumping them down will really help.
|
|||
|
|
|
|||
|
|
> please feel free to fire of any questions to me. As
|
|||
|
|
> you can tell, I have some little experience with all of these
|
|||
|
|
> systems, and may be able to help.
|
|||
|
|
|
|||
|
|
DH> Questions???? Hoooo boy - stand back! <G*10E8>
|
|||
|
|
|
|||
|
|
DH> You talk a bit about the kind of plastic to use for form for
|
|||
|
|
DH> the secondary coil. There is PVC and ABS available readily.
|
|||
|
|
DH> You mention that PVC is better but you also say not to use
|
|||
|
|
DH> Schedule 40 - both kinds of pipe are rated as being Schedule
|
|||
|
|
DH> 40...
|
|||
|
|
|
|||
|
|
PVC is the worst plastic for use in secondary coils. It is
|
|||
|
|
"lossy" (high RF dissipation factor) and has a low dielectric
|
|||
|
|
strength. But it is commonly used because, as you mentioned, it
|
|||
|
|
is available. Coil forms, regardless of material, should be as
|
|||
|
|
thin as possible. Schedule 40 is thick, and is rated for pressure
|
|||
|
|
use. Try to locate the thinner "drain" pipe or "flume duct" PVC
|
|||
|
|
or other thin wall plastic. If PVC is used, it MUST be dry (baked
|
|||
|
|
is preferred) and well sealed with a low loss sealant like poly-
|
|||
|
|
urethane or two part epoxy.
|
|||
|
|
|
|||
|
|
DH> How about plexiglass...
|
|||
|
|
|
|||
|
|
Acrylic and plexiglas is pretty good. Dielectric strength could
|
|||
|
|
be better, but the RF dissipation factor is much lower than PVC.
|
|||
|
|
I have a couple of small acrylic secondaries and I have been
|
|||
|
|
pleased with them. Plexi in large diam. tubes gets expensive.
|
|||
|
|
|
|||
|
|
DH> What determines a certain plastic being good? Should I look
|
|||
|
|
DH> up the dielectric constants and select for a high number?
|
|||
|
|
|
|||
|
|
A combination of dielectric strength, and the RF dissipation
|
|||
|
|
factor. PVC fails this test, and requires drying and sealing to
|
|||
|
|
make it suitable. Teflon is the best; good dielectric strength,
|
|||
|
|
and the lowest RF dissipation factor; then comes polyethylene,
|
|||
|
|
polystyrene, and polypropylene, all of which are good. The same
|
|||
|
|
standards are also used to judge capacitor dielectrics and for
|
|||
|
|
general insulation in Tesla work, and the plastics rate in the
|
|||
|
|
same order.
|
|||
|
|
|
|||
|
|
You asked about power supplies: The pole pig info is on it's way.
|
|||
|
|
See my two part post on obtaining neons for free, and rebuilding
|
|||
|
|
them for high output, high efficiency, Tesla power supplies.
|
|||
|
|
Remember Tesla power supplies must be protected with extensive
|
|||
|
|
RF choking, and safety gaps. This is especially important with
|
|||
|
|
neons, which are much more delicate than pole pigs or potential
|
|||
|
|
xfrmrs. I also use bypass capacitors. For bypass capacitance
|
|||
|
|
across the power supply HV terminals you WANT a dielectric with a
|
|||
|
|
high RF dissipation factor. Barium titanate capacitors with a DC
|
|||
|
|
rating are ideal for this use. Use a 4x voltage safety factor.
|
|||
|
|
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 588 Date: 11-10-93 12:26
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Mark Lawton @ 930/20
|
|||
|
|
Subj: 10kva tesla coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> SEZ Mark Lawton @ 930/20 to Richard Quick <=-
|
|||
|
|
|
|||
|
|
RQ>But if everybody thinks I'm wacky, should I stop posting? I
|
|||
|
|
RQ>don't want to waste people's time. I just thought you all
|
|||
|
|
RQ>were interested.
|
|||
|
|
|
|||
|
|
ML@9> No! Keep the Tesla info comming. I've been building coils
|
|||
|
|
ML@9> for 25+ years. Your description of the magnifing coil is
|
|||
|
|
ML@9> the best I've heard.
|
|||
|
|
|
|||
|
|
Thanks for the vote of confidence. As for my description of the
|
|||
|
|
Magnifier circuit; it is accurate because I have built, tested,
|
|||
|
|
and documented a couple of prototype systems. Now I need a little
|
|||
|
|
more room to scale up, and a place where a system can remain
|
|||
|
|
standing after I have set it up. Where I fire now, if I were to
|
|||
|
|
leave a system set up for 48 hours others would be inconvienced
|
|||
|
|
with my "hogging" the floor space.
|
|||
|
|
|
|||
|
|
ML@9> Before you burn a hole in the Earth, let me know, I want
|
|||
|
|
ML@9> to get a picture of it! <g>
|
|||
|
|
|
|||
|
|
If you write I will send you a glossy photo of a magnifier in
|
|||
|
|
operation. I have a really hot, time exposure, showing the
|
|||
|
|
glowing transmission line, and spots where the coil has struck
|
|||
|
|
the transmission line. Sprays of corona are comming out of
|
|||
|
|
perforations in the insulation.
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 589 Date: 11-10-93 12:32
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> SEZ Dave Halliday to Richard Quick <=-
|
|||
|
|
|
|||
|
|
RQ>I talked with the architect again today. Things are firming
|
|||
|
|
RQ>up for a real lab.
|
|||
|
|
|
|||
|
|
RQ>The building so far is looking like this:
|
|||
|
|
|
|||
|
|
RQ>50' x 60' with 8' masonry walls and 8' sheet metal walls on
|
|||
|
|
RQ>top. This gives a total wall height of 16 feet, with a slope
|
|||
|
|
RQ>up to the center of the roof for a 20' peak.
|
|||
|
|
|
|||
|
|
DH> WOW! Do you plan to do shows? You could charge admission.
|
|||
|
|
|
|||
|
|
DH> Sounds fantastic!
|
|||
|
|
|
|||
|
|
The thought has crossed my mind. The primary use of the structure
|
|||
|
|
would be of course R&D of the Magnifier on a medium scale, but
|
|||
|
|
rest assured it will see other uses as well. With room for
|
|||
|
|
storage, permanent set-ups, etc. Shows would be a snap to do.
|
|||
|
|
Not many people have seen the old Million Volts Through The Body
|
|||
|
|
trick, and it is a thrill to do, as well as to see.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 645 Date: 11-10-93 12:43
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> DH> Hi Richard - again, thanks for the fantastic video!
|
|||
|
|
|
|||
|
|
RQ> DH> Anyway, I was wondering how you went about getting your pole
|
|||
|
|
> DH> pig - line xfrmr - and how much it set you back... I called
|
|||
|
|
> DH> our local City Light and they cannot sell them because of
|
|||
|
|
> DH> the EPA regulations. They actually ship them to some company
|
|||
|
|
> DH> overseas for salvage... I will try some of the smaller PUD's
|
|||
|
|
> DH> and see if they are not so "Politically Correct" <grin>
|
|||
|
|
|
|||
|
|
RQ>Well you can try the utilities, I did, with no luck:-( Unless you
|
|||
|
|
>are willing to climb the fence into their transfer yard and climb
|
|||
|
|
>back out, in the dark, with a 200+ lb. pole pig under your arm,
|
|||
|
|
>you will not get one there :-) I bought mine from:
|
|||
|
|
|
|||
|
|
I have tried six of the local PUD's - all with the same result... Some
|
|||
|
|
of the people there seemed genuinely interested in helping but they had
|
|||
|
|
their hands tied with all of the red tape...
|
|||
|
|
|
|||
|
|
I *do* know where Seattle City Light has their transfer yard (it's
|
|||
|
|
really close to our local warehouse store ( Costco ) but the place is
|
|||
|
|
too well looked after and I think it would be a little hard to build a
|
|||
|
|
Tesla Coil while in jail... :)
|
|||
|
|
|
|||
|
|
|
|||
|
|
RQ> Larry J. Rebman
|
|||
|
|
> The Transformer Bank, Inc.
|
|||
|
|
> University Technology Center
|
|||
|
|
> 1313 Fifth St. SE
|
|||
|
|
> Minneapolis, MN 55415
|
|||
|
|
|
|||
|
|
RQ> Tel: (612) 379-3958, Fax: (612) 379-5962
|
|||
|
|
|
|||
|
|
GREAT!!!!!
|
|||
|
|
|
|||
|
|
>Once you have chosen the xfrmr you want by comparing a few plate
|
|||
|
|
>specs, call them for a price, then send them a certified check.
|
|||
|
|
>The retail cost is a little over $1.00 a pound, so figure a 230
|
|||
|
|
>pound, 10 KVA xfrmr, will run about $250.00.
|
|||
|
|
|
|||
|
|
RQ>The Transformer Bank has a shipping contract with Consolidated
|
|||
|
|
>customer. Figure about $50.00 shipping per 250 pounds.
|
|||
|
|
|
|||
|
|
RQ>My pole pig ran $303.00, including shipping, and was delivered to
|
|||
|
|
>me ten days from the date I dropped the certified check in the
|
|||
|
|
|
|||
|
|
RQ>The unit came with certification papers that match the serial
|
|||
|
|
>number on the plate, showing it to be PCB free. Copies of the
|
|||
|
|
|
|||
|
|
This is exactly the info I have been looking for!
|
|||
|
|
|
|||
|
|
I also got your postings on neon sign transformers yesterday - the idea
|
|||
|
|
of getting the reject units from a sign company is obvious - should have
|
|||
|
|
thought of that one... <WHACK!> ( sound of head hitting desk )
|
|||
|
|
|
|||
|
|
RQ>In shopping for a pig, you should be looking for a unit with two
|
|||
|
|
>high voltage bushings, no taps, 120/240 primary, and a secondary
|
|||
|
|
>voltage of 14,400 volts or higher. Remember! I am accustomed to
|
|||
|
|
|
|||
|
|
Info saved!
|
|||
|
|
|
|||
|
|
RQ>Since the cores on these are shell wound, you will not encounter
|
|||
|
|
>appreciable core saturation. These units must be run with a heavy
|
|||
|
|
>current limiter or they will pull the entire neighborhood into
|
|||
|
|
>your experiment. You should be able to energize them without
|
|||
|
|
|
|||
|
|
I was wondering why you put the limiter on the circuit...
|
|||
|
|
|
|||
|
|
Again, thanks for the info!
|
|||
|
|
|
|||
|
|
We will be starting out with neon transformers, I had mentioned in an
|
|||
|
|
earlier post that the first one will be about 2 - 3' tall, probably a 4"
|
|||
|
|
form - looking forward to drawing some sparks as well as experimenting
|
|||
|
|
with the magnifier!
|
|||
|
|
|
|||
|
|
TTYL - Dave <20>:-)
|
|||
|
|
b QMPro 1.51 b W-E-H-T-H-U-R: Worst spell of weather in six
|
|||
|
|
months...
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- WM v3.10/92-0434
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2 Date: 10 Nov 93 21:02:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
><Imported from Archives, 10/10/93 message to Dave Bearrow><
|
|||
|
|
|
|||
|
|
DB> How did you go about winding your coil? What are the specs?
|
|||
|
|
|
|||
|
|
The first step in winding a coil is to select a coil form. The
|
|||
|
|
coil form should be a low loss material (we are talking RF
|
|||
|
|
losses) like polyethylene, polystyrene, or polypropylene: but the
|
|||
|
|
most common material is PVC plastic drain pipe (thinnest wall is
|
|||
|
|
best) which is high loss. I used a section of PVC thin wall flume
|
|||
|
|
duct.
|
|||
|
|
|
|||
|
|
Ratios of coil height to width are important. Small coils work
|
|||
|
|
best with aspect ratios (height to width) around 5:1 - 4:1,
|
|||
|
|
larger coils (over 8" diam.) have aspect ratios around 3:1. Now
|
|||
|
|
we are talking about the actual winding length here, so allow an
|
|||
|
|
extra inch or so of coil form on each end. Determine the length
|
|||
|
|
required and cut the ends square.
|
|||
|
|
|
|||
|
|
The form must be sanded smooth of surface imperfections, dried
|
|||
|
|
thoroughly, and if PVC is used, it must be sealed. A good sealer
|
|||
|
|
is polyurethane, another is two part epoxy paint. By sealing the
|
|||
|
|
surface of the PVC before you wind on wire you can negate the
|
|||
|
|
excessive losses in PVC plastic coil forms. If necessary the coil
|
|||
|
|
form may be sanded again after the sealer had dried.
|
|||
|
|
|
|||
|
|
The coil should be wound with good quality magnet wire. I use
|
|||
|
|
double Formvar enamel coated magnet wire. Magnet wire gives you
|
|||
|
|
maximum inductance. A coil should have over 900 turns, but not
|
|||
|
|
too much over 1000 turns. There is a little leeway here. Select a
|
|||
|
|
gauge of wire which will allow the aspect ratio and number of
|
|||
|
|
turns to fall within this range.
|
|||
|
|
|
|||
|
|
I dug that up as it pretty much explains things, and you may have
|
|||
|
|
missed the post.
|
|||
|
|
|
|||
|
|
DH> What determines a certain plastics being good?
|
|||
|
|
|
|||
|
|
As I omitted in the other message, the dielectric constant is not
|
|||
|
|
the factor to go by when choosing a coil form. It is really
|
|||
|
|
preferable to use a plastic with the lowest dielectric constant.
|
|||
|
|
The reason for this is you want the distributed capacity of the
|
|||
|
|
coil to be as low as possible. Capacitance in a coil stores
|
|||
|
|
energy, and we want the throughput to be as rapid as possible.
|
|||
|
|
The distributed capacitance in a coil retards the current peak
|
|||
|
|
that follows the VSWR (resonate rise). Coils have enough problems
|
|||
|
|
with distributed capacity from the length of wire, the closeness
|
|||
|
|
of turns, and the number of windings. No need to make things
|
|||
|
|
worse by choosing a plastic with a high dielectric constant.
|
|||
|
|
|
|||
|
|
What is most important in choosing a coil form material is the
|
|||
|
|
dissipation factor. The dissipation factor of all commercial
|
|||
|
|
plastics has been calculated, and somewhere in this mess I have
|
|||
|
|
those figures. If my memory serves me correctly, the standard
|
|||
|
|
RF dissipation factors are based on a frequency of 1 Mhz, close
|
|||
|
|
enough to judge if the plastic is suitable for coil work.
|
|||
|
|
|
|||
|
|
The next important factor to look at is the dielectric strength.
|
|||
|
|
This should take second place to dissipation factors if your goal
|
|||
|
|
is to build the most efficient coil possible. Proper con-
|
|||
|
|
struction, more than anything, prevents electrical breakdown.
|
|||
|
|
|
|||
|
|
Even if the dissipation factor is very low (good efficiency) it
|
|||
|
|
is best to use the thinnest wall coil form possible, even if the
|
|||
|
|
wall thickness is not able to retain a circular cross section
|
|||
|
|
when mechanically stressed. Just treat the coil gently.
|
|||
|
|
|
|||
|
|
As far as the electrical strength of a coil wound on a very thin
|
|||
|
|
walled plastic tube, it should not break down internally if the
|
|||
|
|
WIRE IS NEVER ALLOWED INSIDE THE COIL FORM. Do not drill holes
|
|||
|
|
or introduce the wire into the coil. A hole anywhere on the coil
|
|||
|
|
sidewall will cause a failure regardless of the dielectric
|
|||
|
|
strength of the coil form plastic. My coils are capped top and
|
|||
|
|
bottom with plexiglass plates that are approximately the same
|
|||
|
|
thickness as the coil form wall. I use two-part epoxy cement, and
|
|||
|
|
I seal them airtight. It is OK to drill one small hole in the
|
|||
|
|
bottom plexiglas plate to equalize air pressure, but I do not.
|
|||
|
|
|
|||
|
|
The air terminal capacitance is connected by lead wire (I just
|
|||
|
|
use the magnet wire and avoid splicing) from the top of the coil.
|
|||
|
|
The lead wire is "air wound" up to the terminal, with the turns
|
|||
|
|
about the same diameter as the coil, or a little smaller. You
|
|||
|
|
will see me doing this in the video when I set up for a low power
|
|||
|
|
test in the garage.
|
|||
|
|
|
|||
|
|
The terminal capacitance must have a diameter greater than the
|
|||
|
|
coil form, or spark will break out; either from the top of coil,
|
|||
|
|
or from the air wound turns connecting the coil to the terminal.
|
|||
|
|
|
|||
|
|
The other construction secret not covered in the video is the
|
|||
|
|
ground connection. Once the coil is wound and sealed I take the
|
|||
|
|
base wire and pull it up out of the sealant until it is free all
|
|||
|
|
the way to the beginning of the first turn. I clip off the excess
|
|||
|
|
wire, leaving about a 2" tail. I lay the tail on a metal block,
|
|||
|
|
and using a small ballpeen hammer, flatten it out as best I can.
|
|||
|
|
A strip of copper sheet about 3/4" by 2" is then cut from stock
|
|||
|
|
and bent slightly to match the curvature of the coil form. Solder
|
|||
|
|
the flattened tail to the back of the copper strip. Position the
|
|||
|
|
strip on the coil form just below the bottom turn of wire, and
|
|||
|
|
scribe a rectangle through the sealant all the way to the coil
|
|||
|
|
form plastic. Remove the sealer from the scribed area, then score
|
|||
|
|
and clean the bared plastic. I then use epoxy to bed the copper
|
|||
|
|
strip. This forms a high current grounding plate without
|
|||
|
|
drilling. Ground wire or strap (preferred) can be held in firm
|
|||
|
|
connection to the plate with tape or a large rubber band.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 898 Date: 11-10-93 22:10
|
|||
|
|
From: David Tiefenbrunn
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
On 11-05-93 Richard Quick wrote to David Tiefenbrunn...
|
|||
|
|
|
|||
|
|
RQ> Well Dave,
|
|||
|
|
RQ>
|
|||
|
|
RQ> I talked with the architect again today. Things are firming up
|
|||
|
|
RQ> for a real lab.
|
|||
|
|
RQ>
|
|||
|
|
RQ> The building so far is looking like this:
|
|||
|
|
RQ>
|
|||
|
|
RQ> 50' x 60' with 8' masonry walls and 8' sheet metal walls on top.
|
|||
|
|
RQ> This gives a total wall height of 16 feet, with a slope up to the
|
|||
|
|
RQ> center of the roof for a 20' peak.
|
|||
|
|
|
|||
|
|
I'm in a similar situation. We recently purchased a
|
|||
|
|
2.75 acre lot, and are designing our new home and
|
|||
|
|
lab / shop. So far, I'm planning a 26x56 ranch
|
|||
|
|
with full basement 8-9ft clearance, and since I
|
|||
|
|
plan to use trusses for the floor joists, the
|
|||
|
|
basement will be free of support poles. We will
|
|||
|
|
also have a 3 bay garage (2 for cars, 1 for projects),
|
|||
|
|
with switchable heat. Eventually build a shed
|
|||
|
|
for the 45KW generator.
|
|||
|
|
|
|||
|
|
RQ> The half masonry, half sheet metal wall was a compromise for
|
|||
|
|
RQ> security, cost, and you'll never guess what else... My testing
|
|||
|
|
RQ> shows an all metal walled building will induct, and large
|
|||
|
|
RQ> currents will cruise through the structure. So masonry for the
|
|||
|
|
RQ> first 8' feet seems a good compromise.
|
|||
|
|
|
|||
|
|
Sounds good to me. I was flipping through a friend's
|
|||
|
|
book about some of Tesla's work, and saw some pictures
|
|||
|
|
of his labs. Apperently he had an opening in the roof
|
|||
|
|
with a long pole & ball sticking out. Must have been
|
|||
|
|
something to see at night.
|
|||
|
|
|
|||
|
|
RQ> For electrical service I'm getting 480 volt 3 phase, 400 amps,
|
|||
|
|
RQ> and 110/220 single phase 200 amps.
|
|||
|
|
|
|||
|
|
YIKES! when your'e done with the 10KVA, are you going for 100KVA? <g>
|
|||
|
|
|
|||
|
|
Iv'e got a video tape & etc. ready to mail out,
|
|||
|
|
just have to get to the post office.
|
|||
|
|
|
|||
|
|
I put a few minutes of the first run of the 45KW generator
|
|||
|
|
on it, since you were interested and the tape is going
|
|||
|
|
your way anyhow.
|
|||
|
|
|
|||
|
|
Dave
|
|||
|
|
|
|||
|
|
|
|||
|
|
___
|
|||
|
|
* OFFLINE 1.54 * I love the smell of ozone in the morning.
|
|||
|
|
|
|||
|
|
-!- Maximus 2.01wb
|
|||
|
|
! Origin: =Abbey Road BBS= Higganum, Ct. (203)345-7635
|
|||
|
|
(1:320/5967)
|
|||
|
|
|
|||
|
|
<EFBFBD> Area: FIDOElectr
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 910 Date: 11-16-93 15:37
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> -=> SEZ Dave Halliday to Richard Quick <=-
|
|||
|
|
|
|||
|
|
RQ> RQ> Larry J. Rebman
|
|||
|
|
> > The Transformer Bank, Inc.
|
|||
|
|
|
|||
|
|
He was out hunting until today - haven't called yet but will,
|
|||
|
|
probably tomorrow - I have these pesky clients who actually
|
|||
|
|
want me to do something for them... :)
|
|||
|
|
|
|||
|
|
RQ> RQ>My pole pig ran $303.00, including shipping, and was
|
|||
|
|
> >delivered to me ten days from the date I dropped the
|
|||
|
|
> >certified check in the mail.
|
|||
|
|
|
|||
|
|
RQ>Your shipping rate may be higher since you are all the way cross
|
|||
|
|
>country, and your delivery time will most likely take longer.
|
|||
|
|
>Still, where else are you going to go?
|
|||
|
|
|
|||
|
|
So true - one of the ( few ) down sides of living out here. Looking
|
|||
|
|
on the bright side though, I could have settled in Nome or Honolulu...
|
|||
|
|
|
|||
|
|
Actually the interstate trucking is pretty reasonable - I-90 goes
|
|||
|
|
straight into town and that is one of the major East / West
|
|||
|
|
routes.
|
|||
|
|
|
|||
|
|
>educated me on the EPA requirements. Do not accept a pig, even a
|
|||
|
|
>free one, if it does not have PCB certification papers. Some pigs
|
|||
|
|
|
|||
|
|
RQ>It is not the PCBs that bother me. The problem occurs if youwant
|
|||
|
|
>to sell or dispose of the unit. With current regulations, and
|
|||
|
|
>lack of certification, you have a legal hot potato that can cause
|
|||
|
|
|
|||
|
|
Gotcha! That thought occurred to me too - getting one might be easy
|
|||
|
|
but the eventual disposal would be a nightmare...
|
|||
|
|
|
|||
|
|
RQ>Another type of xfrmr excellent for coil work is the potential
|
|||
|
|
>type xfrmr. These are potted in plastic, not tar, and are not
|
|||
|
|
>shunted like neons. They carry the HV ratings required, and/or
|
|||
|
|
>can be placed in series (two 7500 volt units for a total of
|
|||
|
|
>15KV). Since the cores are NOT shell wound, they will saturate,
|
|||
|
|
|
|||
|
|
RQ>These xfrmrs are used to step down a kilowatt or two for cooling
|
|||
|
|
>fans, and for line voltage sensors in substations; so they are
|
|||
|
|
>not manufactured in the quantities that pigs are. They are much
|
|||
|
|
|
|||
|
|
I will have to call on that one - I spoke to the person who handles
|
|||
|
|
surplus disposal for Seattle City Light and he seemed to be enthusiastic
|
|||
|
|
about helping but his hands were tied by EPA regs. They do have a
|
|||
|
|
mechanism for public sale of surplus items so it shouldn't be too
|
|||
|
|
hard.
|
|||
|
|
|
|||
|
|
RQ>Yeah, neons are not built very solid. The secondaries are
|
|||
|
|
>el'cheapo, as the thinnest wire possible is used. The failure
|
|||
|
|
>rate is pretty high even in their rated service. Since the copper
|
|||
|
|
>content is low, they are not commonly recycled, and the cores
|
|||
|
|
|
|||
|
|
I guess because they are built by the thousand and considered a field
|
|||
|
|
replaceable unit and not repairable... Just pass the "savings" on to
|
|||
|
|
the sign owner...
|
|||
|
|
|
|||
|
|
>pile up quickly. The higher the output current rating, the better
|
|||
|
|
>they are built. Once the tar potting is removed, they last much
|
|||
|
|
>longer in Tesla use. Tar is a very poor RF insulator. To a Tesla
|
|||
|
|
>discharge, the tar looks more like an impedance! Pick up dead
|
|||
|
|
|
|||
|
|
We will go that route - again, I got the neon xformer post so we will
|
|||
|
|
start there!
|
|||
|
|
|
|||
|
|
RQ>capacitors if you want more than a few hours of heavy duty
|
|||
|
|
>service from a bank of neons.
|
|||
|
|
|
|||
|
|
I located a good source for 600 volt AC caps in the 1 to 6 mFd
|
|||
|
|
range - I will use the formula ( corrected version ) that you
|
|||
|
|
posted when we get going. Also, will have to send photos - looking
|
|||
|
|
forward to this!
|
|||
|
|
|
|||
|
|
RQ>As far as RF choking is concerned, the HV filter board I designed
|
|||
|
|
>and built in the video is the best I have ever used. I have not
|
|||
|
|
>had a single xfrmr failure since I built it. Bypass capacitors on
|
|||
|
|
>neon power supplies must be center tap grounded, so I switch
|
|||
|
|
>to using a different capacitor setup. As the secondaries on neons
|
|||
|
|
>are center tap ground, so must the bypass capacitors. I use two
|
|||
|
|
>stacks of caps; each stack has a connection to a HV bushing, and
|
|||
|
|
>to the system ground.
|
|||
|
|
|
|||
|
|
Great! Like I said, I already have some large ferrite torroids, I'll
|
|||
|
|
use them and the spark gap and get some caps. Another person ( used to
|
|||
|
|
be my tech person 'till they went into business for themselves ) has
|
|||
|
|
built a few - he always complained about transformers blowing up - I'll
|
|||
|
|
have to pass this info on if he is still involved. ALso, he was
|
|||
|
|
building coils a *lot* longer than 1/4 wave - still got some respectable
|
|||
|
|
sparks though...
|
|||
|
|
|
|||
|
|
Anyway, got to go back and print some more xmass cards - graphic
|
|||
|
|
artist is having us do 500 of them as a trial run - nice design and
|
|||
|
|
we played with some good paper / ink combo. Got to do the insides now.
|
|||
|
|
|
|||
|
|
TTYL - Dave <20>:-)
|
|||
|
|
|
|||
|
|
|
|||
|
|
RQ>... And if all else fails... Put another megavolt through it
|
|||
|
|
>___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
|
|||
|
|
RQ>--- WM v3.01/93-0100
|
|||
|
|
> ! Origin: St. Louis Users Group BBS (314) 878-7614
|
|||
|
|
(1:100/4.0) (1:100/4.0
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b Reality is a crutch for those who can't handle
|
|||
|
|
homebrew
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- WM v3.10/92-0434
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2729 Date: 11-10-93 22:16
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
><Imported from Archives, 10/10/93 message to Dave Bearrow><
|
|||
|
|
|
|||
|
|
DB> How did you go about winding your coil? What are the specs?
|
|||
|
|
|
|||
|
|
The first step in winding a coil is to select a coil form. The
|
|||
|
|
coil form should be a low loss material (we are talking RF
|
|||
|
|
losses) like polyethylene, polystyrene, or polypropylene: but the
|
|||
|
|
most common material is PVC plastic drain pipe (thinnest wall is
|
|||
|
|
best) which is high loss. I used a section of PVC thin wall flume
|
|||
|
|
duct.
|
|||
|
|
|
|||
|
|
Ratios of coil height to width are important. Small coils work
|
|||
|
|
best with aspect ratios (height to width) around 5:1 - 4:1,
|
|||
|
|
larger coils (over 8" diam.) have aspect ratios around 3:1. Now
|
|||
|
|
we are talking about the actual winding length here, so allow an
|
|||
|
|
extra inch or so of coil form on each end. Determine the length
|
|||
|
|
required and cut the ends square.
|
|||
|
|
|
|||
|
|
The form must be sanded smooth of surface imperfections, dried
|
|||
|
|
thoroughly, and if PVC is used, it must be sealed. A good sealer
|
|||
|
|
is polyurethane, another is two part epoxy paint. By sealing the
|
|||
|
|
surface of the PVC before you wind on wire you can negate the
|
|||
|
|
excessive losses in PVC plastic coil forms. If necessary the coil
|
|||
|
|
form may be sanded again after the sealer had dried.
|
|||
|
|
|
|||
|
|
The coil should be wound with good quality magnet wire. I use
|
|||
|
|
double Formvar enamel coated magnet wire. Magnet wire gives you
|
|||
|
|
maximum inductance. A coil should have over 900 turns, but not
|
|||
|
|
too much over 1000 turns. There is a little leeway here. Select a
|
|||
|
|
gauge of wire which will allow the aspect ratio and number of
|
|||
|
|
turns to fall within this range.
|
|||
|
|
|
|||
|
|
I dug that up as it pretty much explains things, and you may have
|
|||
|
|
missed the post.
|
|||
|
|
|
|||
|
|
DH> What determines a certain plastics being good?
|
|||
|
|
|
|||
|
|
As I omitted in the other message, the dielectric constant is not
|
|||
|
|
the factor to go by when choosing a coil form. It is really
|
|||
|
|
preferable to use a plastic with the lowest dielectric constant.
|
|||
|
|
The reason for this is you want the distributed capacity of the
|
|||
|
|
coil to be as low as possible. Capacitance in a coil stores
|
|||
|
|
energy, and we want the throughput to be as rapid as possible.
|
|||
|
|
The distributed capacitance in a coil retards the current peak
|
|||
|
|
that follows the VSWR (resonate rise). Coils have enough problems
|
|||
|
|
with distributed capacity from the length of wire, the closeness
|
|||
|
|
of turns, and the number of windings. No need to make things
|
|||
|
|
worse by choosing a plastic with a high dielectric constant.
|
|||
|
|
|
|||
|
|
What is most important in choosing a coil form material is the
|
|||
|
|
dissipation factor. The dissipation factor of all commercial
|
|||
|
|
plastics has been calculated, and somewhere in this mess I have
|
|||
|
|
those figures. If my memory serves me correctly, the standard
|
|||
|
|
RF dissipation factors are based on a frequency of 1 Mhz, close
|
|||
|
|
enough to judge if the plastic is suitable for coil work.
|
|||
|
|
|
|||
|
|
The next important factor to look at is the dielectric strength.
|
|||
|
|
This should take second place to dissipation factors if your goal
|
|||
|
|
is to build the most efficient coil possible. Proper con-
|
|||
|
|
struction, more than anything, prevents electrical breakdown.
|
|||
|
|
|
|||
|
|
Even if the dissipation factor is very low (good efficiency) it
|
|||
|
|
is best to use the thinnest wall coil form possible. Turns of
|
|||
|
|
wire, coats of sealer, and hard plastic end caps will stiffen the
|
|||
|
|
coil some. Low density polyethylene forms (such as wastebaskets)
|
|||
|
|
give coils with very high "Q" factors (a measure of efficiency)
|
|||
|
|
but are difficult to work with, as this plastic is VERY flexible.
|
|||
|
|
|
|||
|
|
As far as the electrical strength of a coil wound on a very thin
|
|||
|
|
walled plastic tube, it should not break down internally if THE
|
|||
|
|
WIRE IS NEVER ALLOWED INSIDE THE COIL FORM. Do not drill holes
|
|||
|
|
or introduce the wire into the side of the coil. A hole anywhere
|
|||
|
|
on the coil sidewall will cause a failure regardless of the di-
|
|||
|
|
electric strength of the coil form plastic. My coils are capped
|
|||
|
|
top and bottom with plexiglass plates that are approximately the
|
|||
|
|
same thickness as the coil form wall. I use two-part epoxy cement
|
|||
|
|
and I seal them airtight. It is OK to drill one small hole in the
|
|||
|
|
bottom plexiglas plate to equalize air pressure, but I do not.
|
|||
|
|
|
|||
|
|
The air terminal capacitance is connected by lead wire (I just
|
|||
|
|
use the magnet wire and avoid splicing) from the top of the coil.
|
|||
|
|
The lead wire is "air wound" up to the terminal, with the turns
|
|||
|
|
about the same diameter as the coil, or a little smaller. You
|
|||
|
|
will see me doing this in the video when I set up for a low power
|
|||
|
|
test in the garage.
|
|||
|
|
|
|||
|
|
The terminal capacitance must have a diameter greater than the
|
|||
|
|
coil form, or spark will break out; either from the top of coil,
|
|||
|
|
or from the air wound turns connecting the coil to the terminal.
|
|||
|
|
|
|||
|
|
The other construction secret not covered in the video is the
|
|||
|
|
ground connection. Once the coil is wound and sealed I take the
|
|||
|
|
base wire and pull it up out of the sealant until it is free all
|
|||
|
|
the way to the beginning of the first turn. I clip off the excess
|
|||
|
|
wire, leaving about a 2" tail. I lay the tail on a metal block,
|
|||
|
|
and using a small ballpeen hammer, flatten it out as best I can.
|
|||
|
|
A strip of copper sheet about 3/4" by 2" is then cut from stock
|
|||
|
|
and bent slightly to match the curvature of the coil form. Solder
|
|||
|
|
the flattened tail to the back of the copper strip. Position the
|
|||
|
|
strip on the coil form just below the bottom turn of wire, and
|
|||
|
|
scribe a rectangle through the sealant all the way to the coil
|
|||
|
|
form plastic. Remove the sealer from the scribed area, then score
|
|||
|
|
and clean the bared plastic. I then use epoxy to bed the copper
|
|||
|
|
strip. This forms a high current grounding plate without
|
|||
|
|
drilling. Ground wire or strap (preferred) can be held in firm
|
|||
|
|
connection to the plate with tape or a large rubber band.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2729 Date: 11-10-93 22:16
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
DH> What determines a certain plastics being good?
|
|||
|
|
|
|||
|
|
(for winding coils)
|
|||
|
|
|
|||
|
|
As I omitted in the other message, the dielectric constant is not
|
|||
|
|
the factor to go by when choosing a coil form. It is really
|
|||
|
|
preferable to use a plastic with the lowest dielectric constant.
|
|||
|
|
The reason for this is you want the distributed capacity of the
|
|||
|
|
coil to be as low as possible. Capacitance in a coil stores
|
|||
|
|
energy, and we want the throughput to be as rapid as possible.
|
|||
|
|
The distributed capacitance in a coil retards the current peak
|
|||
|
|
that follows the VSWR (resonate rise). Coils have enough problems
|
|||
|
|
with distributed capacity from the length of wire, the closeness
|
|||
|
|
of turns, and the number of windings. No need to make things
|
|||
|
|
worse by choosing a plastic with a high dielectric constant.
|
|||
|
|
|
|||
|
|
What is most important in choosing a coil form material is the
|
|||
|
|
dissipation factor. The dissipation factor of all commercial
|
|||
|
|
plastics has been calculated, and somewhere in this mess I have
|
|||
|
|
those figures. If my memory serves me correctly, the standard
|
|||
|
|
RF dissipation factors are based on a frequency of 1 Mhz, close
|
|||
|
|
enough to judge if the plastic is suitable for coil work.
|
|||
|
|
|
|||
|
|
The next important factor to look at is the dielectric strength.
|
|||
|
|
This should take second place to dissipation factors if your goal
|
|||
|
|
is to build the most efficient coil possible. Proper con-
|
|||
|
|
struction, more than anything, prevents electrical breakdown.
|
|||
|
|
|
|||
|
|
Even if the dissipation factor is very low (good efficiency) it
|
|||
|
|
is best to use the thinnest wall coil form possible. Turns of
|
|||
|
|
wire, coats of sealer, and hard plastic end caps will stiffen the
|
|||
|
|
coil some. Low density polyethylene forms (such as wastebaskets)
|
|||
|
|
give coils with very high "Q" factors (a measure of efficiency)
|
|||
|
|
but are difficult to work with, as this plastic is VERY flexible.
|
|||
|
|
|
|||
|
|
As far as the electrical strength of a coil wound on a very thin
|
|||
|
|
walled plastic tube, it should not break down internally if THE
|
|||
|
|
WIRE IS NEVER ALLOWED INSIDE THE COIL FORM. Do not drill holes
|
|||
|
|
or introduce the wire into the side of the coil. A hole anywhere
|
|||
|
|
on the coil sidewall will cause a failure regardless of the di-
|
|||
|
|
electric strength of the coil form plastic. My coils are capped
|
|||
|
|
top and bottom with plexiglass plates that are approximately the
|
|||
|
|
same thickness as the coil form wall. I use two-part epoxy cement
|
|||
|
|
and I seal them airtight. It is OK to drill one small hole in the
|
|||
|
|
bottom plexiglas plate to equalize air pressure, but I do not.
|
|||
|
|
|
|||
|
|
The air terminal capacitance is connected by lead wire (I just
|
|||
|
|
use the magnet wire and avoid splicing) from the top of the coil.
|
|||
|
|
The lead wire is "air wound" up to the terminal, with the turns
|
|||
|
|
about the same diameter as the coil, or a little smaller. You
|
|||
|
|
will see me doing this in the video when I set up for a low power
|
|||
|
|
test in the garage.
|
|||
|
|
|
|||
|
|
The terminal capacitance must have a diameter greater than the
|
|||
|
|
coil form for high powered work, or spark will break out; either
|
|||
|
|
from the top of coil, or from the air wound turns connecting the
|
|||
|
|
coil to the terminal.
|
|||
|
|
|
|||
|
|
The other construction secret not covered in the video is the
|
|||
|
|
ground connection. Once the coil is wound and sealed I take the
|
|||
|
|
base wire and pull it up out of the sealant until it is free all
|
|||
|
|
the way to the beginning of the first turn. I clip off the excess
|
|||
|
|
wire, leaving about a 2" tail. I lay the tail on a metal block,
|
|||
|
|
and using a small ballpeen hammer, flatten it out as best I can.
|
|||
|
|
A strip of copper sheet about 3/4" by 2" is then cut from stock
|
|||
|
|
and bent slightly to match the curvature of the coil form. Solder
|
|||
|
|
the flattened tail to the back of the copper strip. Position the
|
|||
|
|
strip on the coil form just below the bottom turn of wire, and
|
|||
|
|
scribe a rectangle through the sealant all the way to the coil
|
|||
|
|
form plastic. Remove the sealer from the scribed area, then score
|
|||
|
|
and clean the bared plastic. I then use epoxy to bed the copper
|
|||
|
|
strip. This forms a high current grounding plate without
|
|||
|
|
drilling. Ground wire or strap (preferred) can be held in firm
|
|||
|
|
connection to the plate with tape or a large rubber band.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 683 Date: 11-11-93 11:05
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Mark Lawton @ 930/20
|
|||
|
|
Subj: 10kva tesla coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
ML>RQ> GD> Well I have a Jacob's ladder on an old theatre marquis neon
|
|||
|
|
>RQ> GD> transformer. Really makes the kitty stop and pay attention.
|
|||
|
|
>RQ> GD> Worries people who see it, too. My inner Beavis loves it.
|
|||
|
|
>RQ>
|
|||
|
|
>RQ>Yeah, I have some videos of the pole pig settin on the garage
|
|||
|
|
>RQ>floor with 3/8" copper pipe rails. Pulls arcs clear to the
|
|||
|
|
|
|||
|
|
ML>Love it... Pole Pig = Jacob's Ladder
|
|||
|
|
|
|||
|
|
ML>PS Does anyone need some neon transformers? I've got 3 collecting
|
|||
|
|
dust.
|
|||
|
|
>(2) 7500V & (1) 15000V
|
|||
|
|
|
|||
|
|
Hi Mark - I just got a copy of Richards video ( well worth the $10 ) and
|
|||
|
|
the Jacobs ladder is fantastic! He is using 1/2" copper pipe for the
|
|||
|
|
electrodes and getting about a foot-long arc at the end of it.
|
|||
|
|
|
|||
|
|
Has a wonderful "fat" sound to it too - not the bzzzzzt of a sign
|
|||
|
|
transformer - more of a deep growl...
|
|||
|
|
|
|||
|
|
I saw in your previous ms. that you also are into coil building.
|
|||
|
|
I built a few a while ago and will be working with two other
|
|||
|
|
people to do a couple of them - small one ( 3' or so ) for now and
|
|||
|
|
maybe a >big< one down the road.
|
|||
|
|
|
|||
|
|
TTYL - Dave <20>:-)
|
|||
|
|
b QMPro 1.51 b (r)bb<<3C><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> "Hmm, the force is strong with
|
|||
|
|
this one"
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- WM v3.10/92-0434
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 672 Date: 11-11-93 16:35
|
|||
|
|
From: Brian Mcmurry
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: Re: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
On Sun 7-Nov-1993 4:14p, Richard Quick wrote:
|
|||
|
|
|
|||
|
|
RQ> These units must be run with a heavy
|
|||
|
|
RQ> current limiter or they will pull the entire neighborhood into
|
|||
|
|
RQ> your experiment. You should be able to energize them without
|
|||
|
|
RQ> dimming the lights.
|
|||
|
|
|
|||
|
|
I've been following all the Tesla threads and wonder what your
|
|||
|
|
monthly electric bill runs. :)
|
|||
|
|
|
|||
|
|
BTW, keep it coming.
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
! Origin: *AACHEN* 818-972-9440 Burbank, CA FIDONET
|
|||
|
|
(1:102/844)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2755 Date: 11-11-93 17:08
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Robert Taylor
|
|||
|
|
Subj: Re: 10KVA TESLA COIL
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> SEZ Robert Taylor to George Powell <=-
|
|||
|
|
|
|||
|
|
> using neon xformers..
|
|||
|
|
|
|||
|
|
GP> Do you have any probs with the xformers heating up after a
|
|||
|
|
GP> while?
|
|||
|
|
|
|||
|
|
RT> To be honest--has been a while since I've had my xformers to
|
|||
|
|
RT> play with. But as I remember, the Jacob's Ladder hook-up
|
|||
|
|
RT> didn't cause any unusual overheat. You might check the size
|
|||
|
|
RT> of your initiating gap at the bottom of the ladder. If it's
|
|||
|
|
RT> too close--it will put extra strain on the xformer.
|
|||
|
|
|
|||
|
|
Nope, it will not make any difference. The gap at the bottom of
|
|||
|
|
the rails can be closed and the xfrmr will not be subject to any
|
|||
|
|
extra strain. If the rails are properly set, the gap will be
|
|||
|
|
pretty close.
|
|||
|
|
|
|||
|
|
RT> One thought--if your xformer is in a small case, the
|
|||
|
|
RT> overheat may be natural.
|
|||
|
|
|
|||
|
|
Even in a big case the heating is normal. A bigger case means it
|
|||
|
|
takes longer for the heat to get to the point where you feel it.
|
|||
|
|
|
|||
|
|
RT> The ones that I used were fairly big monsters that weighed
|
|||
|
|
RT> in at about 20 lbs. If yours is in a case about 5" high by
|
|||
|
|
RT> about 10" long--then yours may be prone to overheating.
|
|||
|
|
|
|||
|
|
It's not "overheating", it's normal heating. Unless the tar is
|
|||
|
|
melting, or output is diminished, there is no problem.
|
|||
|
|
|
|||
|
|
RT> However, if you have any questions as to your coil's
|
|||
|
|
RT> integrity try using a VOM or continuity tester on both the
|
|||
|
|
RT> secondary & primary & the case to make sure that there are
|
|||
|
|
RT> no obvious shorts. A serious overheat can really test your
|
|||
|
|
RT> fire insurance.
|
|||
|
|
|
|||
|
|
Doubtful, the secondaries can be shorted without any harm, and no
|
|||
|
|
overheating will result. Shorts through the tar potting form
|
|||
|
|
carbon tracks which are high in resistance and may not be
|
|||
|
|
detectable with a VOM. And since these xfrmrs are magnetic
|
|||
|
|
leakage shunted in the core, a short in a HV winding will basicly
|
|||
|
|
cut the secondary out of the field flux generated by the primary.
|
|||
|
|
|
|||
|
|
The best way to test these suckers is to grap some HV rated wire
|
|||
|
|
and draw an arc from each HV bushing to the case. If the arc
|
|||
|
|
sputters, is weak, nonexistant, or intermittent then the core
|
|||
|
|
should be unpotted and the winding replaced or restored. As I
|
|||
|
|
mentioned in another post, about half the time unpotting alone
|
|||
|
|
will cure a carbon track short.
|
|||
|
|
|
|||
|
|
RT> You might also want to hook your VOM up on the primary side
|
|||
|
|
RT> & monitor your current draw (should be some specs on the
|
|||
|
|
RT> case as to 120 VAC draw). If you see way-out draws or if
|
|||
|
|
RT> the draw starts up w/time--then you may have a problem w/
|
|||
|
|
RT> the windings.
|
|||
|
|
|
|||
|
|
If you go by this then every unit tested will show a problem
|
|||
|
|
unless they were power factor corrected at the factory. The
|
|||
|
|
plate specs give the OUTPUT wattage, output voltage, and output
|
|||
|
|
current in miliamps. If you measure the input power vs. the
|
|||
|
|
output specs you will find 50% of your input energy missing. The
|
|||
|
|
unit gets hot....
|
|||
|
|
|
|||
|
|
You will lead Mr. Powell to believe there is a problem in the
|
|||
|
|
core when that may not be the case. Due to the design of the core
|
|||
|
|
this is completely normal. Fully one half of the input power is
|
|||
|
|
converted to heat eventually, as energy is bypassed through
|
|||
|
|
the core shunts to limit the output. Unless the xfrmr is getting
|
|||
|
|
hot enough to melt the potting, or the output is markedly
|
|||
|
|
diminished, there is no problem. If tar is melting, then the most
|
|||
|
|
common problem is a shorted primary winding.
|
|||
|
|
|
|||
|
|
I have unpotted dozens of these transformers, and my experience
|
|||
|
|
covers every major manufacturer. I have seen nearly every problem
|
|||
|
|
that can cause failure, as I only rebuild failed units. I have
|
|||
|
|
experimented with the effects of altering the core shunts for
|
|||
|
|
greater output, and I have experimented with power factor
|
|||
|
|
correcting in these units. I have done testing to measure the
|
|||
|
|
efficiencies, and have developed proceedures to improve these
|
|||
|
|
efficiencies. In other words I know these cores backwards and
|
|||
|
|
forwards.
|
|||
|
|
|
|||
|
|
Mr. Powell may not have much experience with magnetic leakage
|
|||
|
|
controlled xfrmrs. He is most likely interperting the normal
|
|||
|
|
heat production as a problem. A normal step up xfrmr weighing
|
|||
|
|
10 lbs, with a throughput under a kilowatt, would not get warm.
|
|||
|
|
The normal step up xfrmr is not shunted, and wastes very little
|
|||
|
|
energy. Yet the neon gets quite warm with throughputs of only a
|
|||
|
|
third of a kilowatt. The neon is a different breed, and produces
|
|||
|
|
as much heat as output.
|
|||
|
|
|
|||
|
|
I hope I have set the record straight. If you doubt my analysis,
|
|||
|
|
please unpott a neon core, and look at the physical placement of
|
|||
|
|
the shunts. You will wonder how any magnetic flux at all can get
|
|||
|
|
to the secondary windings. The shunts are positioned so as to
|
|||
|
|
place a direct magnetic bypass that completely surrounds the
|
|||
|
|
primary. It is in effect, a built in magnetic short circuit. The
|
|||
|
|
field flux passed through these shunts is wasted energy, and the
|
|||
|
|
wasted energy heats the iron core. If you have a 360 watt neon
|
|||
|
|
core, no power factor correction, and no core modifications, you
|
|||
|
|
will get about 360 watts of heat if you put a Jacob' Ladder or
|
|||
|
|
Tesla coil on it. 360 watts of heat will bring the core temp up
|
|||
|
|
quickly and it will stay quite warm to the touch. Yet everything
|
|||
|
|
is working fine, except for your efficiencies.
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2792 Date: 11-12-93 14:56
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> SEZ Dave Halliday to Richard Quick <=-
|
|||
|
|
|
|||
|
|
DH> Hi Richard - again, thanks for the fantastic video!
|
|||
|
|
|
|||
|
|
RQ> Larry J. Rebman
|
|||
|
|
> The Transformer Bank, Inc.
|
|||
|
|
> University Technology Center
|
|||
|
|
> 1313 Fifth St. SE
|
|||
|
|
> Minneapolis, MN 55415
|
|||
|
|
|
|||
|
|
RQ> Tel: (612) 379-3958, Fax: (612) 379-5962
|
|||
|
|
|
|||
|
|
DH> GREAT!!!!!
|
|||
|
|
|
|||
|
|
>The retail cost is a little over $1.00 a pound, so figure a 230
|
|||
|
|
>pound, 10 KVA xfrmr, will run about $250.00.
|
|||
|
|
|
|||
|
|
RQ>The Transformer Bank has a shipping contract with
|
|||
|
|
RQ>Consolidated Frieghtways
|
|||
|
|
|
|||
|
|
RQ>My pole pig ran $303.00, including shipping, and was
|
|||
|
|
>delivered to me ten days from the date I dropped the
|
|||
|
|
>certified check in the mail.
|
|||
|
|
|
|||
|
|
Your shipping rate may be higher since you are all the way cross
|
|||
|
|
country, and your delivery time will most likely take longer.
|
|||
|
|
Still, where else are you going to go?
|
|||
|
|
|
|||
|
|
RQ>The unit came with certification papers that match the serial
|
|||
|
|
>number on the plate, showing it to be PCB free.
|
|||
|
|
|
|||
|
|
DH> This is exactly the info I have been looking for!
|
|||
|
|
|
|||
|
|
Having been there I pretty much know the score. I looked for over
|
|||
|
|
a year for a supplier for these units, while the utilities
|
|||
|
|
educated me on the EPA requirements. Do not accept a pig, even a
|
|||
|
|
free one, if it does not have PCB certification papers. Some pigs
|
|||
|
|
I have seen will carry a PCB free cert. number on the plate, and
|
|||
|
|
that too is OK. You can then write the manufacturer and they will
|
|||
|
|
mail the papers if you provide them with the number.
|
|||
|
|
|
|||
|
|
It is not the PCBs that bother me. The problem occurs if you want
|
|||
|
|
to sell or dispose of the unit. With current regulations, and
|
|||
|
|
lack of certification, you have a legal hot potato that can cause
|
|||
|
|
you problems. I have not seen the letter of the law, but the
|
|||
|
|
utilities have informed me the legal implications are rather
|
|||
|
|
severe, and place serious liablities on the owners of pigs
|
|||
|
|
containing PCB.
|
|||
|
|
|
|||
|
|
There are a few transfer yards that have clean room holding
|
|||
|
|
facilities. They are expensive to own, maintain, and operate,
|
|||
|
|
but they are licensed to drain the old oil, rinse the cores, and
|
|||
|
|
scrap them. Cores can be purchased for a few bucks ($5-$20).
|
|||
|
|
The problem is that the cores are old, frequently damaged, or
|
|||
|
|
contaminated with water (from sitting in the rain) and won't hold
|
|||
|
|
up unless they are dried, repaired, and resubmerged in xfrmr oil.
|
|||
|
|
Better off to pay a little more and buy a surplus new unit.
|
|||
|
|
|
|||
|
|
Another type of xfrmr excellent for coil work is the potential
|
|||
|
|
type xfrmr. These are potted in plastic, not tar, and are not
|
|||
|
|
shunted like neons. They carry the HV ratings required, and/or
|
|||
|
|
can be placed in series (two 7500 volt units for a total of
|
|||
|
|
15KV). Since the cores are NOT shell wound, they will saturate,
|
|||
|
|
and so they are safer and require little or no current limiting.
|
|||
|
|
These xfrmrs may be obtained from utilities without the problem
|
|||
|
|
of EPA regs. The normal ratings on potential xfrmrs runs from
|
|||
|
|
about 1-3 KVA, and so are ideal for the middle area between neons
|
|||
|
|
and pole pigs. The surplus cost on these runs from $25.00 -
|
|||
|
|
$50.00 each, but they will be used, not new, surplus.
|
|||
|
|
|
|||
|
|
These xfrmrs are used to step down a kilowatt or two for cooling
|
|||
|
|
fans, and for line voltage sensors in substations; so they are
|
|||
|
|
not manufactured in the quantities that pigs are. They are much
|
|||
|
|
harder to find in the surplus market, but definately worth
|
|||
|
|
grabbing if you come across one. If you developed any contacts at
|
|||
|
|
the local utilities while searching for a pig, you might call
|
|||
|
|
them back and ask them about potential transformers.
|
|||
|
|
|
|||
|
|
DH> I also got your postings on neon sign transformers yesterday
|
|||
|
|
DH> - the idea of getting the reject units from a sign company
|
|||
|
|
DH> is obvious - should have thought of that one... <WHACK!>
|
|||
|
|
DH> ( sound of head hitting desk )
|
|||
|
|
|
|||
|
|
Yeah, neons are not built very solid. The secondaries are
|
|||
|
|
el'cheapo, as the thinnest wire possible is used. The failure
|
|||
|
|
rate is pretty high even in their rated service. Since the copper
|
|||
|
|
content is low, they are not commonly recycled, and the cores
|
|||
|
|
pile up quickly. The higher the output current rating, the better
|
|||
|
|
they are built. Once the tar potting is removed, they last much
|
|||
|
|
longer in Tesla use. Tar is a very poor RF insulator. To a Tesla
|
|||
|
|
discharge, the tar looks more like an impedance! Pick up dead
|
|||
|
|
units for nothing, remove the tar, modify the core slightly, and
|
|||
|
|
use pfc capacitance; then they will serve cheaply and effi-
|
|||
|
|
ciently. You must use heavy RF choking, safety gaps, and bypass
|
|||
|
|
capacitors if you want more than a few hours of heavy duty
|
|||
|
|
service from a bank of neons.
|
|||
|
|
|
|||
|
|
As far as RF choking is concerned, the HV filter board I designed
|
|||
|
|
and built in the video is the best I have ever used. I have not
|
|||
|
|
had a single xfrmr failure since I built it. Bypass capacitors on
|
|||
|
|
neon power supplies must be center tap grounded, so I switch
|
|||
|
|
to using a different capacitor setup. As the secondaries on neons
|
|||
|
|
are center tap ground, so must the bypass capacitors. I use two
|
|||
|
|
stacks of caps; each stack has a connection to a HV bushing, and
|
|||
|
|
to the system ground.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 654 Date: 11-12-93 16:57
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Guy Daugherty
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>a real lab.
|
|||
|
|
|
|||
|
|
RQ>The building so far is looking like this:
|
|||
|
|
|
|||
|
|
RQ>50' x 60' with 8' masonry walls and 8' sheet metal walls on
|
|||
|
|
RQ>top. This gives a total wall height of 16 feet, with a slope
|
|||
|
|
RQ>up to the center of the roof for a 20' peak.
|
|||
|
|
|
|||
|
|
GD> This is geting out of hand, Richard.
|
|||
|
|
|
|||
|
|
Well Guy, I need a place to put all of my stuff where it won't
|
|||
|
|
get rained on. Any other bright ideas?
|
|||
|
|
|
|||
|
|
I have about $5000.00 worth of Tesla equip. ($15,000 replacement
|
|||
|
|
cost), about $5000.00 worth of chemistry equip, not to mention
|
|||
|
|
boxes of homemade pyrotechinics equipment (ball mill, star
|
|||
|
|
presses, rocket ramming table, drying racks, rolls of paper and
|
|||
|
|
tubing, mixing containers, sieves, etc.) I also buy, sell, and
|
|||
|
|
build/rebuild/repair Vespa scooters; own three now, plus parts of
|
|||
|
|
a forth, plus a workbench of special tools for engines, frames,
|
|||
|
|
wheels, etc.
|
|||
|
|
|
|||
|
|
I would like to mess around with some hard vacuum equipment,
|
|||
|
|
and do some bulb blowing/tube bending... and I need a place to
|
|||
|
|
put my shop tools (band saw, drill press, belt sander, table saw,
|
|||
|
|
air compressor, etc.)
|
|||
|
|
|
|||
|
|
Then I need an office (some place other than my bedroom), where I
|
|||
|
|
can put my $5000.00 worth of computer equipt., desk, and library,
|
|||
|
|
and what do I do with my 55 gallon fish tank? The AV equipment?
|
|||
|
|
|
|||
|
|
Where do you suggest I go with all of my toys? I would like to
|
|||
|
|
house everything somewhere where I don't disturb people, I can
|
|||
|
|
work day or night at will; blow things up, burn things out, and
|
|||
|
|
set up and fire some big coils, and all will be safe.
|
|||
|
|
|
|||
|
|
... Do you need a roomate? Is it OK if I experiment nextdoor?
|
|||
|
|
|
|||
|
|
My "eccentricities" core my very being. I have a temporary "block
|
|||
|
|
house" out in the back drive where I mill powders, but I worry
|
|||
|
|
about vandals having their tables turned on them, or some
|
|||
|
|
innocent kids investigating the grinding noise and accidently
|
|||
|
|
blowing themselves off the property. I retained a shipping/
|
|||
|
|
receiving agent some years ago, and he will tell you that I get
|
|||
|
|
the most bizzare packages he has ever seen...
|
|||
|
|
|
|||
|
|
BTW I don't think I require professional advice on how to spend
|
|||
|
|
money, I learned just fine, and I know exactly why I get up and
|
|||
|
|
go to work every day. My priorities are different than most
|
|||
|
|
people, and so are my needs. This building is not an extra-
|
|||
|
|
vagance. It is already filled, and I will probably have to add an
|
|||
|
|
additional storage building within the first couple of years or
|
|||
|
|
so, then I imagine I will have to add another building to move
|
|||
|
|
out my shop equipment to keep the floor space clear in the main
|
|||
|
|
lab area. What would you do?
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 12 Nov 93 22:49:34
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
* Originally By: Richard Quick
|
|||
|
|
* Originally To: Guy Daugherty
|
|||
|
|
* Originally Re: 10KVA Tesla Coil
|
|||
|
|
* Original Area: FIDOElectr
|
|||
|
|
* Forwarded by : Blue Wave v2.12
|
|||
|
|
|
|||
|
|
RQ>a real lab.
|
|||
|
|
|
|||
|
|
RQ>The building so far is looking like this:
|
|||
|
|
|
|||
|
|
RQ>50' x 60' with 8' masonry walls and 8' sheet metal walls on
|
|||
|
|
RQ>top. This gives a total wall height of 16 feet, with a slope
|
|||
|
|
RQ>up to the center of the roof for a 20' peak.
|
|||
|
|
|
|||
|
|
GD> This is geting out of hand, Richard.
|
|||
|
|
|
|||
|
|
Well Guy, I need a place to put all of my stuff where it won't
|
|||
|
|
get rained on. Any other bright ideas?
|
|||
|
|
|
|||
|
|
I have about $5000.00 worth of Tesla equip. ($15,000 replacement
|
|||
|
|
cost), about $5000.00 worth of chemistry equip, not to mention
|
|||
|
|
boxes of homemade pyrotechinics equipment (ball mill, star
|
|||
|
|
presses, rocket ramming table, drying racks, rolls of paper and
|
|||
|
|
tubing, mixing containers, sieves, etc.) I also buy, sell, and
|
|||
|
|
build/rebuild/repair Vespa scooters; own three now, plus parts of
|
|||
|
|
a forth, plus a workbench of special tools for engines, frames,
|
|||
|
|
wheels, etc.
|
|||
|
|
|
|||
|
|
I would like to mess around with some hard vacuum equipment,
|
|||
|
|
and do some bulb blowing/tube bending... and I need a place to
|
|||
|
|
put my shop tools (band saw, drill press, belt sander, table saw,
|
|||
|
|
air compressor, etc.)
|
|||
|
|
|
|||
|
|
Then I need an office (some place other than my bedroom), where I
|
|||
|
|
can put my $5000.00 worth of computer equipt., desk, and library,
|
|||
|
|
and what do I do with my 55 gallon fish tank? The AV equipment?
|
|||
|
|
|
|||
|
|
Where do you suggest I go with all of my toys? I would like to
|
|||
|
|
house everything somewhere where I don't disturb people, I can
|
|||
|
|
work day or night at will; blow things up, burn things out, and
|
|||
|
|
set up and fire some big coils, and all will be safe.
|
|||
|
|
|
|||
|
|
... Do you need a roomate? Is it OK if I experiment nextdoor?
|
|||
|
|
|
|||
|
|
My "eccentricities" core my very being. I have a temporary "block
|
|||
|
|
house" out in the back drive where I mill powders, but I worry
|
|||
|
|
about vandals having their tables turned on them, or some
|
|||
|
|
innocent kids investigating the grinding noise and accidently
|
|||
|
|
blowing themselves off the property. I retained a shipping/
|
|||
|
|
receiving agent some years ago, and he will tell you that I get
|
|||
|
|
the most bizzare packages he has ever seen...
|
|||
|
|
|
|||
|
|
BTW I don't think I require professional advice on how to spend
|
|||
|
|
money, I learned just fine, and I know exactly why I get up and
|
|||
|
|
go to work every day. My priorities are different than most
|
|||
|
|
people, and so are my needs. This building is not an extra-
|
|||
|
|
vagance. It is already filled, and I will probably have to add an
|
|||
|
|
additional storage building within the first couple of years or
|
|||
|
|
so, then I imagine I will have to add another building to move
|
|||
|
|
out my shop equipment to keep the floor space clear in the main
|
|||
|
|
lab area. What would you do?
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 13 Nov 93 00:42:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Looking over my last post, I can anticipate a few questions.
|
|||
|
|
I described a very poor grounding system. What then makes a
|
|||
|
|
good RF ground?
|
|||
|
|
|
|||
|
|
Well a small coil can fire off a radiating counterpoise (insul-
|
|||
|
|
ated metal plate) a few feet square. But when you overload a
|
|||
|
|
counterpoise, you get a really wicked corona display, and the
|
|||
|
|
coil will produce no additional spark. Having set up various
|
|||
|
|
experiments to study this effect, including tracing the ground
|
|||
|
|
current, and using a current transformer to measure the RMS amps
|
|||
|
|
coming from the base of a Tesla secondary, I can tell you this.
|
|||
|
|
|
|||
|
|
There is no such thing as a RF "system" ground that is too heavy.
|
|||
|
|
|
|||
|
|
Not in Tesla coils.
|
|||
|
|
|
|||
|
|
This is another thing that Tesla went on and on about. But my
|
|||
|
|
follow up experiments in this area, which have been quite
|
|||
|
|
extensive, show that he knew what he was talking about.
|
|||
|
|
|
|||
|
|
I got extremely lucky in that we have a hydraulic car lift in our
|
|||
|
|
back driveway. There is a 5' steel cylinder that is 14" in diam..
|
|||
|
|
In addition to the giant piston, there are buried oil and air
|
|||
|
|
tanks with all of the associated plumbing. The lift controls are
|
|||
|
|
sunk right where the house foundation drains, and it is in the
|
|||
|
|
lowest spot in rear of the house. There are no electrical
|
|||
|
|
connections made to this lift, air being supplied when needed by
|
|||
|
|
a hose. This is my Tesla ground.
|
|||
|
|
|
|||
|
|
A good Tesla RF ground is usually developed, not happened upon.
|
|||
|
|
It will require some digging and post driving. It needs to be
|
|||
|
|
kept moist. Drive deep with copper pipe, or copper clad rod, and
|
|||
|
|
keep adding to it. Metal culverts, metal sewer drain pipe should
|
|||
|
|
be connected if available. Spread out! Do not drive rod or pipe
|
|||
|
|
close together. Four or five 8' rods driven in a long row, 8'
|
|||
|
|
apart will work. A ground that you are absolutely sure will
|
|||
|
|
ground a bolt of natural lightning, will be heavy enough to
|
|||
|
|
ground most coils. DON'T CHINCH!
|
|||
|
|
|
|||
|
|
People have asked me if I get complaints about RFI. The answer is
|
|||
|
|
no. The reason is that I isolate my coil (system) ground from the
|
|||
|
|
copper water pipe and from the utility ground (which in my house
|
|||
|
|
are the same). Here is a basic list of things that you DO NOT
|
|||
|
|
CONNECT to the system RF ground: WATER PIPE, GAS PIPE, UTILITY
|
|||
|
|
GROUND, ANYTHING THAT STICKS UP IN THE AIR (fences, gutters,
|
|||
|
|
downspouts) TELEPHONE GROUNDS, & CABLE GROUNDS. Most anything
|
|||
|
|
else is fair game, but use common sense.
|
|||
|
|
|
|||
|
|
You build or find a heavy ground and you ground your coil system
|
|||
|
|
to it. The connections made to this RF ground are as follows:
|
|||
|
|
SECONDARY COIL, SAFETY GAP, STEP UP XFRMR CORE, BYPASS CAPACITORS
|
|||
|
|
(if using a center tap grnd xfrmr), SPARK GAP MOTOR HOUSINGS,
|
|||
|
|
SPARK SHIELDS, AND ANY OBJECT SUBJECT TO BE STRUCK WITH DISCHARGE
|
|||
|
|
|
|||
|
|
I don't usually use my caps lock, but this is important. This
|
|||
|
|
technique prevents RFI complaints, and will save valuable
|
|||
|
|
electronic equipment in your area from destruction. It may save
|
|||
|
|
you from the last shock of your life.
|
|||
|
|
|
|||
|
|
You ground your variac housing to your neutral wire. All other
|
|||
|
|
coil controls, relay housings, control xfrmr cores, line RFI
|
|||
|
|
filters (run backwards) are grounded to the variac housing. Strap
|
|||
|
|
is taken from the variac housing to a well grounded water pipe.
|
|||
|
|
This protects the coil operator and the control circuits from
|
|||
|
|
kickback that may come down the line from the step up xfrmr.
|
|||
|
|
|
|||
|
|
Two 60 cycle cables are run from the variac, through reversed
|
|||
|
|
line filters, out to the step up xfrmr. No ground connection is
|
|||
|
|
made anywhere between the 60 cycle cabinet ground and the RF
|
|||
|
|
system ground. Hot wires only are given to the primary of the
|
|||
|
|
step up xfrmr, as well as any gap motors or other utility for the
|
|||
|
|
coil tank circuit.
|
|||
|
|
|
|||
|
|
This is called the "two ground system" and it is highly recom-
|
|||
|
|
mended. The idea of the two ground system is to send all of the
|
|||
|
|
RF to a dedicated ground, and prevent bleedover into your house
|
|||
|
|
wiring, control cabinet and/or water pipe. It also protects the
|
|||
|
|
operator with two low potential grounds from the lethal possi-
|
|||
|
|
bilities of a coil misfire or similar "incident".
|
|||
|
|
|
|||
|
|
People have told me I am crazy for messing with all of this HV.
|
|||
|
|
I take NO CHANCES with my ground. The ground strap is literally
|
|||
|
|
the "bottom line" in coil safety or any other HV apparatus. If an
|
|||
|
|
accident occurs; a core shorts out, a capacitor blows, or the
|
|||
|
|
secondary decides to dump a 10' spark back to the tank circuit;
|
|||
|
|
I know my safety gap - RF ground will handle the load. My 60
|
|||
|
|
cycle cabinet ground is my backup. With tank circuit energies in
|
|||
|
|
the megawatt range you can't afford to have a weak point.
|
|||
|
|
|
|||
|
|
Keep the physical distance between the base of the secondary coil
|
|||
|
|
and the system RF ground as short as possible. I try never to go
|
|||
|
|
further than 20 feet for low power stuff, and 15' or less for the
|
|||
|
|
high powered work. Use the heaviest strap possible. I run two
|
|||
|
|
heavy straps; one from the base of the secondary directly to
|
|||
|
|
system ground, the second snakes around and grounds everything
|
|||
|
|
else. This is a high Q Tesla grounding system. It gives the best
|
|||
|
|
coil performance, the most safety for the coil operator,
|
|||
|
|
and guess what?
|
|||
|
|
|
|||
|
|
People in my house, and the neighbors next door, can watch TV or
|
|||
|
|
listen to the radio, with no snow or static! Even during high
|
|||
|
|
power operation! I never get spark from my coil controls. All of
|
|||
|
|
the RF currents that are not expended in spark are directly,
|
|||
|
|
positively, grounded through a high Q ground path to a high Q
|
|||
|
|
ground that is electrically isolated from all other equipment.
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2932 Date: 11-13-93 10:43
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> RQ>The building so far is looking like this:
|
|||
|
|
RQ> RQ>50' x 60' with 8' masonry walls and 8' sheet metal wallson
|
|||
|
|
> RQ>top. This gives a total wall height of 16 feet, with a slope
|
|||
|
|
|
|||
|
|
RQ> DH> WOW! Do you plan to do shows? You could charge admission.
|
|||
|
|
RQ> DH> Sounds fantastic!
|
|||
|
|
|
|||
|
|
RQ>The thought has crossed my mind. The primary use of the structure
|
|||
|
|
>would be of course R&D of the Magnifier on a medium scale, but
|
|||
|
|
>rest assured it will see other uses as well. With room for
|
|||
|
|
>storage, permanent set-ups, etc. Shows would be a snap to do.
|
|||
|
|
>Not many people have seen the old Million Volts Through The Body
|
|||
|
|
>trick, and it is a thrill to do, as well as to see.
|
|||
|
|
|
|||
|
|
I grew up in Pittsburgh PA and the local Planetarium there had a coil
|
|||
|
|
that they gave public demos on - I do not know any of the actual data on
|
|||
|
|
it save that it was about 7-10 feet tall, large solenoid primary of
|
|||
|
|
about 10 turns with a tap on it and that it really caught my attention
|
|||
|
|
every time it was set off <grin>
|
|||
|
|
|
|||
|
|
Anyway, I just got a bunch of material from you so I will print it out
|
|||
|
|
and read through it. I did get your post on Neon Sign transformers and
|
|||
|
|
the other people are also interested in starting small but I also got
|
|||
|
|
the info about that place that sells GE surplus pole pigs too so we
|
|||
|
|
should be ready for that too!
|
|||
|
|
|
|||
|
|
Thanks for the clarification re: the Schedule 40 pipe - I had always
|
|||
|
|
looked at it as being heavier so therefore "better" - never thought of
|
|||
|
|
the actual material as being a liability. What about ABS - is there any
|
|||
|
|
difference with that?
|
|||
|
|
|
|||
|
|
Anyway, we will probably do a couple capacitors in the next week or so.
|
|||
|
|
Like I said, I have an OK vacuum pump ( I do graphic arts and printing
|
|||
|
|
)
|
|||
|
|
and can pump it out so that should improve things.
|
|||
|
|
|
|||
|
|
Anyway, many many thanks for your time and help!
|
|||
|
|
|
|||
|
|
TTYL - Dave <20>:-)
|
|||
|
|
b QMPro 1.51 b "Oxymoron": A really, really, dumb baby ox...
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- WM v3.10/92-0434
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 852 Date: 11-13-93 12:34
|
|||
|
|
From: Guy Daugherty
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> RQ>50' x 60' with 8' masonry walls and 8' sheet metal walls on
|
|||
|
|
|
|||
|
|
RQ> GD> This is geting out of hand, Richard.
|
|||
|
|
|
|||
|
|
RQ>Well Guy, I need a place to put all of my stuff where it won't
|
|||
|
|
RQ>get rained on. Any other bright ideas?
|
|||
|
|
|
|||
|
|
Yeah, but the perpetual motion thing with the generator driving
|
|||
|
|
the motor driving the generator isn't working the way I thought it
|
|||
|
|
would.
|
|||
|
|
|
|||
|
|
RQ>I have about $5000.00 worth of Tesla equip. ($15,000 replacement
|
|||
|
|
RQ>cost), about $5000.00 worth of chemistry equip, not to mention
|
|||
|
|
RQ>boxes of homemade pyrotechinics equipment (ball mill, star
|
|||
|
|
RQ>presses, rocket ramming table, drying racks, rolls of paper and
|
|||
|
|
RQ>tubing, mixing containers, sieves, etc.) I also buy, sell, and
|
|||
|
|
|
|||
|
|
No. Richard, you're NOT building fireworks, too? STOP IT!!
|
|||
|
|
|
|||
|
|
RQ>build/rebuild/repair Vespa scooters; own three now, plus parts of
|
|||
|
|
RQ>a forth, plus a workbench of special tools for engines, frames,
|
|||
|
|
RQ>wheels, etc.
|
|||
|
|
|
|||
|
|
Not much surprise there, really.....
|
|||
|
|
|
|||
|
|
RQ>I would like to mess around with some hard vacuum equipment,
|
|||
|
|
RQ>and do some bulb blowing/tube bending... and I need a place to
|
|||
|
|
RQ>put my shop tools (band saw, drill press, belt sander, table saw,
|
|||
|
|
RQ>air compressor, etc.)
|
|||
|
|
|
|||
|
|
RQ>Then I need an office (some place other than my bedroom), where I
|
|||
|
|
RQ>can put my $5000.00 worth of computer equipt., desk, and library,
|
|||
|
|
RQ>and what do I do with my 55 gallon fish tank? The AV equipment?
|
|||
|
|
|
|||
|
|
RQ>Where do you suggest I go with all of my toys? I would like to
|
|||
|
|
|
|||
|
|
Oh, no, Richard. Don't EVER leave the door open like that.
|
|||
|
|
|
|||
|
|
RQ>house everything somewhere where I don't disturb people, I can
|
|||
|
|
|
|||
|
|
I'm kinda worried about how you're disturbing yourself....
|
|||
|
|
|
|||
|
|
RQ>work day or night at will; blow things up, burn things out, and
|
|||
|
|
RQ>set up and fire some big coils, and all will be safe.
|
|||
|
|
|
|||
|
|
You need a concrete-lined pit.
|
|||
|
|
|
|||
|
|
RQ>My "eccentricities" core my very being. I have a temporary "block
|
|||
|
|
|
|||
|
|
Not me. Completely nnnnormal, here. Honest. My neighbor's dog
|
|||
|
|
will attest to this in court.
|
|||
|
|
|
|||
|
|
RQ>house" out in the back drive where I mill powders, but I worry
|
|||
|
|
RQ>about vandals having their tables turned on them, or some
|
|||
|
|
RQ>innocent kids investigating the grinding noise and accidently
|
|||
|
|
RQ>blowing themselves off the property. I retained a shipping/
|
|||
|
|
|
|||
|
|
Just desserts.
|
|||
|
|
|
|||
|
|
RQ>receiving agent some years ago, and he will tell you that I get
|
|||
|
|
RQ>the most bizzare packages he has ever seen...
|
|||
|
|
|
|||
|
|
We take your word for it.....
|
|||
|
|
|
|||
|
|
RQ>BTW I don't think I require professional advice on how to spend
|
|||
|
|
|
|||
|
|
Oh, I'm just amateur. Haven't made a cent at it, yet....
|
|||
|
|
|
|||
|
|
RQ>money, I learned just fine, and I know exactly why I get up and
|
|||
|
|
RQ>go to work every day. My priorities are different than most
|
|||
|
|
RQ>people, and so are my needs. This building is not an extra-
|
|||
|
|
RQ>vagance. It is already filled, and I will probably have to add an
|
|||
|
|
RQ>additional storage building within the first couple of years or
|
|||
|
|
RQ>so, then I imagine I will have to add another building to move
|
|||
|
|
RQ>out my shop equipment to keep the floor space clear in the main
|
|||
|
|
RQ>lab area. What would you do?
|
|||
|
|
|
|||
|
|
Ummm.... place a palm against each temple and repeat "Oh, no!" a
|
|||
|
|
dozen times?
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
SLMR 2.1a But when the first shot hit the dock, I started
|
|||
|
|
runnin'
|
|||
|
|
|
|||
|
|
-!- GEcho 1.00
|
|||
|
|
! Origin: The Silhouetter bbs (209)472-0843 USR DS 16.8K
|
|||
|
|
(1:208/216)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2826 Date: 11-13-93 13:26
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Brian Mcmurry
|
|||
|
|
Subj: Re: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
BM> On Sun 7-Nov-1993 4:14p, Richard Quick wrote:
|
|||
|
|
|
|||
|
|
RQ> These units must be run with a heavy current limiter or they
|
|||
|
|
RQ> will pull the entire neighborhood into your experiment. You
|
|||
|
|
RQ> should be able to energize them without dimming the lights.
|
|||
|
|
|
|||
|
|
BM> I've been following all the Tesla threads and wonder what
|
|||
|
|
BM> your monthly electric bill runs. :)
|
|||
|
|
|
|||
|
|
BM> BTW, keep it coming.
|
|||
|
|
|
|||
|
|
Thanks, another vote of confidence. Much appreciated.
|
|||
|
|
|
|||
|
|
Well it's not as bad as it sounds. Tesla had one god: EFFICIENCY!
|
|||
|
|
|
|||
|
|
If you follow his work, you will find that efficiency is what
|
|||
|
|
makes his systems beautiful, they don't waste much.
|
|||
|
|
|
|||
|
|
At one time I hooked a standard electric company wattmeter up to
|
|||
|
|
the 240 V 100 A single phase supply circuit that I am using at
|
|||
|
|
this time. Over a period of a month or so I used about $20.00
|
|||
|
|
worth of electricity to actually fire coils.
|
|||
|
|
|
|||
|
|
There are other circuits that I tap to provide utilities to the
|
|||
|
|
coils. Some of my spark gaps use compressed air to quench, others
|
|||
|
|
use 240 volt vacuum motors, yet another uses muffin fans, I also
|
|||
|
|
run a rotary gap motor in combination with a static gap on all my
|
|||
|
|
bigger stuff for better efficiency and performance. These
|
|||
|
|
utilities might use 25% of the energy I put into the coil, so add
|
|||
|
|
another $5.00. I would feel comfortable saying $25-$30 a month.
|
|||
|
|
|
|||
|
|
Even when I run a big coil at 8-10 KVA I don't leave it running
|
|||
|
|
all night. Five or six runs of between 3-8 minutes each is enough
|
|||
|
|
to satisfy me, give me the data I need to improve, and get some
|
|||
|
|
good video.
|
|||
|
|
|
|||
|
|
I don't fire every night. It is much more fun to have company
|
|||
|
|
over and have a friend video tape the coils in action. The big
|
|||
|
|
stuff has to be fired outdoors since I don't have the ceiling
|
|||
|
|
height or floor space to fire anything bigger than an 8" coil
|
|||
|
|
indoors. Outdoor firing is weather and neighbor dependant. I have
|
|||
|
|
had some bad luck firing coils in windy conditions, and the
|
|||
|
|
neighbors have threaten to get their torches and burn me out
|
|||
|
|
if I fire too late at night (spark gaps sound like unmuffled
|
|||
|
|
chainsaws at this power level).
|
|||
|
|
|
|||
|
|
The pole pigs used in heavy work are over 95% efficient, but
|
|||
|
|
current limiting, depending on type, can waste 50% of your input
|
|||
|
|
energy in the form of heat. In every area of my work I have
|
|||
|
|
pushed the edges of my efficiencies, just as Tesla would have.
|
|||
|
|
I use efficient step up power supplies to drive the oscillators,
|
|||
|
|
with efficient: current limiters, tank circuits, capacitors,
|
|||
|
|
spark gaps, etc.. With neons power factor correction helps a lot.
|
|||
|
|
|
|||
|
|
The goal in 1/4 wave coils is to turn every watt possible into
|
|||
|
|
discharge, and waste as little as possible between the wall and
|
|||
|
|
the discharge terminal. I am very good at it, and I believe I am
|
|||
|
|
holding record spark lengths for input powers. If I do not hold
|
|||
|
|
records, then I am very very close, but I have not seen any
|
|||
|
|
system outperform mine up to 10KVA. And there is still room to do
|
|||
|
|
better with my 1/4 wave coils.
|
|||
|
|
|
|||
|
|
To give you an idea, my power processing efficiencies range from
|
|||
|
|
460 to 1100 watts (power drawn from the wall), per foot of spark
|
|||
|
|
generated on my large coil. These figures are not linear, as I am
|
|||
|
|
not using a sychronous rotary spark gap. The average strike from
|
|||
|
|
the coil will reach anywhere from nine to eleven feet at 5-8 KVA.
|
|||
|
|
But have seen more than a few 15' strikes at powers under 10 KVA.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2933 Date: 11-13-93 15:17
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: tesla coils
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Hi Richard - I have had time to go through and read the stuff you
|
|||
|
|
posted - thanks again for the time you are spending here - this info
|
|||
|
|
will be not only a great help but also a great motivator.
|
|||
|
|
|
|||
|
|
I had thought about getting back into Tesla coils for some time and
|
|||
|
|
it took seeing what some one else out there was doing it to get me
|
|||
|
|
started <grin>
|
|||
|
|
|
|||
|
|
DH> Very interesting that so much of the energy from it could be
|
|||
|
|
DH> so closely coupled to the second coil... This will be a fun
|
|||
|
|
DH> winter project!!!
|
|||
|
|
|
|||
|
|
The "extra coil" is completely uncoupled from the driver system.
|
|||
|
|
Current from the driver is being fed into the base of the free
|
|||
|
|
standing "extra" coil by transmission line. While you are not
|
|||
|
|
able to see in the video... The transmission line glows with
|
|||
|
|
corona from the heavy current.
|
|||
|
|
|
|||
|
|
I figured that it was not part of the primary / secondary circuit
|
|||
|
|
but got it's power through the wire off of the Tesla secondary.
|
|||
|
|
|
|||
|
|
Amazing stuff and definitely the next thing to try after building the
|
|||
|
|
first coil.
|
|||
|
|
|
|||
|
|
DH> I was talking with one of the people and they agreed to
|
|||
|
|
DH> start on a smaller coil - I was thinking in the order of 4"
|
|||
|
|
DH> diameter and about 3' long.
|
|||
|
|
|
|||
|
|
The aspect ratio (height to width ratio) is important. The
|
|||
|
|
planned coil has an aspect ratio of 9:1 (36" long, 4" diam.)
|
|||
|
|
this should be reduced to no more than 5:1 on a 4" diam. coil.
|
|||
|
|
6" coils work best with 4:1 aspect ratio, anything larger 3:1.
|
|||
|
|
|
|||
|
|
******(cut from another part of a post)*******
|
|||
|
|
The coil should be wound with good quality magnet wire. I use
|
|||
|
|
double Formvar enamel coated magnet wire. Magnet wire gives you
|
|||
|
|
maximum inductance. A coil should have over 900 turns, but not
|
|||
|
|
too much over 1000 turns. There is a little leeway here. Select a
|
|||
|
|
gauge of wire which will allow the aspect ratio and number of
|
|||
|
|
turns to fall within this range.
|
|||
|
|
**********************************************
|
|||
|
|
|
|||
|
|
|
|||
|
|
OK - I made an "editorial decision" today to go for a 6" diameter form
|
|||
|
|
and make it 24" long. I just was out running errands and got 1,500'
|
|||
|
|
of 22 gauge Heavy Formvar insulated magnet wire so with a diameter of
|
|||
|
|
0.0253, this works out to 948 turns - right in the ballpark that you
|
|||
|
|
suggested in another part of this post.
|
|||
|
|
|
|||
|
|
I think the other people were thinking in the realm of the normal
|
|||
|
|
misconception of Tesla coils as being long and skinny but I guess that
|
|||
|
|
would make them longer than 1/4 wave...
|
|||
|
|
|
|||
|
|
We'll see what happens!
|
|||
|
|
|
|||
|
|
|
|||
|
|
Vacuum Spark Gap
|
|||
|
|
the video, but once it was working, it worked great. It has
|
|||
|
|
trouble at power levels over 5 kVA. After an evening on the big
|
|||
|
|
coil at 8 to 10 kVA I had some pitting and melting of the
|
|||
|
|
electrode faces. This was reduced as I cut back on the number of
|
|||
|
|
electrodes, increased the size (both length and diam.) of the
|
|||
|
|
electrodes, and allowed for a larger gap between electrodes.
|
|||
|
|
|
|||
|
|
OK - I wonder if it would be feasible to make it with continuously
|
|||
|
|
variable gap size - something with threaded plastic rods...
|
|||
|
|
|
|||
|
|
I think that since we are starting with neon sign x-formers, we can
|
|||
|
|
just use the standard 6" PVC gap you showed - aren't going to be
|
|||
|
|
running too much power through it <yet>
|
|||
|
|
|
|||
|
|
These homemade capacitors are high Q, reliable, and relatively
|
|||
|
|
easy to build. Pumping them down will really help.
|
|||
|
|
|
|||
|
|
As I said - I do printing as well as the electronics and computers and
|
|||
|
|
every piece of equipment here ( almost ) has some kind of vacuum pump
|
|||
|
|
associated with it. These are all rotary-vane types so not really
|
|||
|
|
high Torr but should be OK for "potting" the caps in oil.
|
|||
|
|
|
|||
|
|
DH> You mention that PVC is better but you also say not to use
|
|||
|
|
DH> Schedule 40 - both kinds of pipe are rated as being Schedule
|
|||
|
|
|
|||
|
|
PVC is the worst plastic for use in secondary coils. It is
|
|||
|
|
"lossy" (high RF dissipation factor) and has a low dielectric
|
|||
|
|
strength. But it is commonly used because, as you mentioned, it
|
|||
|
|
is available. Coil forms, regardless of material, should be as
|
|||
|
|
thin as possible. Schedule 40 is thick, and is rated for pressure
|
|||
|
|
use. Try to locate the thinner "drain" pipe or "flume duct" PVC
|
|||
|
|
or other thin wall plastic. If PVC is used, it MUST be dry (baked
|
|||
|
|
is preferred) and well sealed with a low loss sealant like poly-
|
|||
|
|
urethane or two part epoxy.
|
|||
|
|
|
|||
|
|
OK - there is some pretty thin wall stuff in our local "Home Center"
|
|||
|
|
store - I was worried about mechanical strength though - I can deflect
|
|||
|
|
this pipe with just moderate pressure - I will have to stop into the
|
|||
|
|
Cadillac Plastics store and see what they have in their cut-off's
|
|||
|
|
bin... Also, I have a small South Bend lathe and could probably get
|
|||
|
|
Schedule 40 and then turn off a bunch of it until it got too thin...
|
|||
|
|
|
|||
|
|
Baking it and then sealing it is a good idea - I will probably use the
|
|||
|
|
slow speed on the lathe to wind the coil so I could also turn it
|
|||
|
|
slowly while I was applying the sealer - keep it drip-free...
|
|||
|
|
|
|||
|
|
A combination of dielectric strength, and the RF dissipation
|
|||
|
|
factor. PVC fails this test, and requires drying and sealing to
|
|||
|
|
make it suitable. Teflon is the best; good dielectric strength,
|
|||
|
|
and the lowest RF dissipation factor; then comes polyethylene,
|
|||
|
|
polystyrene, and polypropylene, all of which are good. The same
|
|||
|
|
|
|||
|
|
When I was getting the wire, I made the mistake of pricing teflon
|
|||
|
|
insulated wire. That would be a coil that shocks people twice.
|
|||
|
|
|
|||
|
|
|
|||
|
|
You spent ??HOW?? much... <grin>
|
|||
|
|
|
|||
|
|
You asked about power supplies: The pole pig info is on it's way.
|
|||
|
|
See my two part post on obtaining neons for free, and rebuilding
|
|||
|
|
them for high output, high efficiency, Tesla power supplies.
|
|||
|
|
|
|||
|
|
I got both sets of info - the guy you recommended was out hunting but
|
|||
|
|
will be back on this Monday - they knew about Tesla coils though and
|
|||
|
|
recognized your name...
|
|||
|
|
|
|||
|
|
Remember Tesla power supplies must be protected with extensive
|
|||
|
|
RF choking, and safety gaps. This is especially important with
|
|||
|
|
neons, which are much more delicate than pole pigs or potential
|
|||
|
|
xfrmrs. I also use bypass capacitors. For bypass capacitance
|
|||
|
|
across the power supply HV terminals you WANT a dielectric with a
|
|||
|
|
high RF dissipation factor. Barium titanate capacitors with a DC
|
|||
|
|
rating are ideal for this use. Use a 4x voltage safety factor.
|
|||
|
|
|
|||
|
|
Got it - the insulation of the neon is only meant to handle 15 KV, not
|
|||
|
|
whatever the coil is putting out... I have a bunch of largish ferrite
|
|||
|
|
torrids so I'll use them and a spark gap.
|
|||
|
|
|
|||
|
|
The other construction secret not covered in the video is the
|
|||
|
|
ground connection. Once the coil is wound and sealed I take the
|
|||
|
|
base wire and pull it up out of the sealant until it is free all
|
|||
|
|
the way to the beginning of the first turn. I clip off the excess
|
|||
|
|
wire, leaving about a 2" tail. I lay the tail on a metal block,
|
|||
|
|
|
|||
|
|
Great idea - high current, low impedance and quick connection.
|
|||
|
|
|
|||
|
|
Anyway, this message is kind of chopped up, I saved your posts and
|
|||
|
|
then just went in with Q Edit and edited and added replies but you
|
|||
|
|
should follow who is talking...
|
|||
|
|
|
|||
|
|
Again - thanks for your time and info - I'll have to send you copies
|
|||
|
|
of the pictures once we start building this puppy!
|
|||
|
|
|
|||
|
|
TTYL - Dave <20>:-)
|
|||
|
|
b QMPro 1.51 b True Multitasking - 3 PC's and a chair with
|
|||
|
|
wheels...
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- WM v3.10/92-0434
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 13 Nov 93 19:17:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Tesla "Q" Factors
|
|||
|
|
|
|||
|
|
Since some people are saving these posts to disk, and at least
|
|||
|
|
one other person (Dave Halliday) is going to embark on some coil
|
|||
|
|
building. I thought I would take a moment and discuss some Tesla
|
|||
|
|
theory that directly relates to coil efficiencies. The subject
|
|||
|
|
is the "Q" factor.
|
|||
|
|
|
|||
|
|
Q is literally the "Quality" factor. There is no real way to
|
|||
|
|
calculate Q in a subassembly, assembly, connection, or component
|
|||
|
|
in a Tesla coil. But Q exists. Q in a secondary coil can be calc-
|
|||
|
|
ulated from the physical coil data after it is wound, but with
|
|||
|
|
most coil parts it is more like a "god". Some people dedicate
|
|||
|
|
their lives in search of god, coilers dedicate their lives in
|
|||
|
|
search of higher Qs.
|
|||
|
|
|
|||
|
|
The Q factor of any Tesla component is a combination of material,
|
|||
|
|
design, and construction. A coiler never reaches near theoretical
|
|||
|
|
Q factors. We don't wind our coils out of high temperature super-
|
|||
|
|
conductors and fire them submerged in liquid nitrogen. Indeed
|
|||
|
|
people hardly ever submerge their coils in oil like in good old
|
|||
|
|
days. Oil submersion is probably the single greatest thing you
|
|||
|
|
can do to raise the overall Q factor in any Tesla coil system. In
|
|||
|
|
the old days they almost had to submerge the coils in oil to
|
|||
|
|
regain Q that was lost in the use of "classic" materials such as
|
|||
|
|
wood or cardboard coil forms, rubber or tar insulators, silk or
|
|||
|
|
cotton covered wire. These "classic" construction materials are
|
|||
|
|
inherently low Q and result in designs and construction techni-
|
|||
|
|
ques that are also low Q. Builders tolerated oil leaking wooden
|
|||
|
|
boxes and greasy cabinets in many cases to get a good spark.
|
|||
|
|
|
|||
|
|
We live in an age of high Q materials and construction techni-
|
|||
|
|
ques. I have mentioned some of the most commonly used materials
|
|||
|
|
in several posts, but I will list a few again. Teflon, polyethy-
|
|||
|
|
lene, polystyrene, polypropylene, acrylics, epoxy, hot glue,
|
|||
|
|
enamel and polyurethane sealers. As well as the all time classic
|
|||
|
|
high Q corona suppressant, mineral oil.
|
|||
|
|
|
|||
|
|
Modern coils had to be redesigned in order to take advantage of
|
|||
|
|
these new materials. These modern designs differ in many ways
|
|||
|
|
from a coil using "classic" low Q materials. Secondary coils can
|
|||
|
|
be close wound with magnet wire rather than space wound with
|
|||
|
|
insulated wire. Primary coils can be tighter, placing higher
|
|||
|
|
inductance into a smaller area. Coupling can be increased
|
|||
|
|
dramatically, even in 1/4 wave systems, by using corona sup-
|
|||
|
|
pressing sealers and toroid discharge terminals. The coils get
|
|||
|
|
smaller, more powerful, and more efficient.
|
|||
|
|
|
|||
|
|
Building high Q systems means we can live without things like oil
|
|||
|
|
submersion, and still get better spark. With these higher Q
|
|||
|
|
systems it is more economical to put additional capacitance and
|
|||
|
|
heavier power supplies on line to increase spark than it is to
|
|||
|
|
struggle getting the system Q closer to ultimate theoretical.
|
|||
|
|
Theoretical Q can go to infinity.
|
|||
|
|
|
|||
|
|
So when you are designing, hunting materials, and building;
|
|||
|
|
always keep an eye on the Q factor. Attention paid to many little
|
|||
|
|
areas adds up to substantially higher overall system Q. A solid
|
|||
|
|
ground, tight clean connections, close wound and sealed
|
|||
|
|
secondary, primary coil of high Q material wound on a high Q
|
|||
|
|
plastic form, well aligned gaps that quench, plastic film HV
|
|||
|
|
pulse discharging capacitance, and toroid dischargers are some of
|
|||
|
|
the major factors in the overall system Q.
|
|||
|
|
|
|||
|
|
Experiments in a variety of Tesla systems shows that the overall
|
|||
|
|
Q of the system is limited by the lowest Q component used. The
|
|||
|
|
old expression "The chain is as strong as its' weakest link"
|
|||
|
|
applies.
|
|||
|
|
|
|||
|
|
One area that is frequently neglected by Tesla coilers is the Q
|
|||
|
|
of the system RF ground and the ground path. Since coil systems
|
|||
|
|
are built from the "ground" up, this is the first thing a good
|
|||
|
|
coiler will look at when he goes to set up and fire a coil. I
|
|||
|
|
know a guy in New York who fires at about the same power levels
|
|||
|
|
as I do. My coil systems are much higher Q and I get much better
|
|||
|
|
spark using less energy with a smaller coil. When I took a close
|
|||
|
|
look at his coil setup, I noticed he was grounding his coil
|
|||
|
|
system to the neutral wire in the breaker box. Walking outside, I
|
|||
|
|
traced the ground path to a single 3' copper plated rod driven in
|
|||
|
|
by the utility company to ground the supply xfrmr to the
|
|||
|
|
building. This is completely inadequate for high powered Tesla
|
|||
|
|
work, and is quite unsafe.
|
|||
|
|
|
|||
|
|
I also noticed that this guy had a newly constructed all wood
|
|||
|
|
power control cabinet. Now there is nothing wrong with that as
|
|||
|
|
long as it is well wired with ground strap, which it wasn't. But
|
|||
|
|
out back I could see a nice metal control cabinet that had been
|
|||
|
|
recently gutted. When I inquired, he stated he had to switch to
|
|||
|
|
an ungrounded, wooden, control cabinet because he was drawing
|
|||
|
|
sparks to fingers when he touched the controls...
|
|||
|
|
|
|||
|
|
The paced distance from the base of his secondary to the 3'
|
|||
|
|
copper clad ground rod was slightly over 75'. Most of the
|
|||
|
|
distance was traversed with #10 wire. No wonder when he grounded
|
|||
|
|
the cabinet and touched to controls he drew spark, his ground
|
|||
|
|
path had a high RF impedance, and was backing up like a clogged
|
|||
|
|
toilet. I tactfully offered some advice, which was refused.
|
|||
|
|
Obviously he had spent a lot of effort compounding his mistakes,
|
|||
|
|
and had no desire to let someone else point them out.
|
|||
|
|
|
|||
|
|
Don't make the same mistake. Be efficient and safe. Ground
|
|||
|
|
properly from the very start. Think Q!
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 839 Date: 11-14-93 20:22
|
|||
|
|
From: Joseph Worthington
|
|||
|
|
To: Guy Daugherty
|
|||
|
|
Subj: 10kva Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
The thread on the Tesla project is very interesting!
|
|||
|
|
If you are the moderator, please let it go on for a while.
|
|||
|
|
Joseph
|
|||
|
|
-!-
|
|||
|
|
! Origin: The Bunker---Eugene, OR (503) 345-2429 (1:152/11)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 886 Date: 11-15-93 22:45
|
|||
|
|
From: David Tiefenbrunn
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Hello, Richard.
|
|||
|
|
|
|||
|
|
I have sent you a video tape. I hope the
|
|||
|
|
offer is still good. I included a few
|
|||
|
|
minutes of the first run of the 45KW generator.
|
|||
|
|
|
|||
|
|
The new lab sounds great.
|
|||
|
|
|
|||
|
|
Of course, you will probably get the tape before
|
|||
|
|
this message. :)
|
|||
|
|
|
|||
|
|
Dave
|
|||
|
|
|
|||
|
|
___
|
|||
|
|
* OFFLINE 1.54 * I love the smell of ozone in the morning.
|
|||
|
|
|
|||
|
|
-!- Maximus 2.01wb
|
|||
|
|
! Origin: =Abbey Road BBS= Higganum, Ct. (203)345-7635
|
|||
|
|
(1:320/5967)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 15 Nov 93 22:51:20
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Spark Gap Technology
|
|||
|
|
|
|||
|
|
I recently explained the definition of "Q", and the requirements
|
|||
|
|
and functions of high Q grounding systems in Tesla coils. Another
|
|||
|
|
area that needs attention is spark gap technologies.
|
|||
|
|
|
|||
|
|
Spark gaps are the "brain" of the Tesla Coil. They are high the
|
|||
|
|
voltage switches that allow the tank circuit capacitance to
|
|||
|
|
charge and discharge. As performance of the spark gap switch is
|
|||
|
|
improved, peak powers in the tank circuit grow without requiring
|
|||
|
|
additional input power. When a good coiler sets up and fires a
|
|||
|
|
system, the first thing he looks at is his ground. The second
|
|||
|
|
thing he looks at is his spark gap system.
|
|||
|
|
|
|||
|
|
Before I cover the main points on spark gaps, I want to talk for
|
|||
|
|
a moment about their more modern replacements, the vacuum tube,
|
|||
|
|
and the solid state transistor (FET etc.). Both modern day
|
|||
|
|
replacements can be made to function in Tesla type oscillators
|
|||
|
|
in several modes. A single resonating coil may be base fed RF
|
|||
|
|
current from solid state and tube drivers, or primary coils may
|
|||
|
|
be driven with amplifier circuits. Class C amplifiers are
|
|||
|
|
preferred. Both of these modes work well within the power
|
|||
|
|
handling abilities of the switch (tube or solid state device),
|
|||
|
|
but when it comes to handling raw power, nothing delivers the
|
|||
|
|
megawatts like the old fashion spark gap. The spark gap gives
|
|||
|
|
the biggest bang for the buck.
|
|||
|
|
|
|||
|
|
No discussion of spark gaps is complete without at least a rough
|
|||
|
|
definition of "quenching". This term is commonly thrown around
|
|||
|
|
when talking about spark gaps. When I began coiling, I saw the
|
|||
|
|
term frequently, but never could find a good definition.
|
|||
|
|
|
|||
|
|
Quenching refers, more than anything else, to the art of extin-
|
|||
|
|
guishing an established arc in the gap. The term points to the
|
|||
|
|
fact that it is much easier to start a gap firing than it is to
|
|||
|
|
put one out. In Tesla coils, putting out the arc is imperative to
|
|||
|
|
good tank circuit performance.
|
|||
|
|
|
|||
|
|
A cold, non-firing, spark gap is "clean". It contains no plasma,
|
|||
|
|
or hot ions. On applying voltage to the gap, a tension is esta-
|
|||
|
|
blished, and electromagnetic lines of force form. The physical
|
|||
|
|
shape of the electrodes determines to a large degree the shape of
|
|||
|
|
the field, or lines of force, and the resultant breakdown voltage
|
|||
|
|
of the gap at any given distance. In other words, electrodes of
|
|||
|
|
different shapes will break down at different voltages, even with
|
|||
|
|
identical distances between them.
|
|||
|
|
|
|||
|
|
Once the voltage punctures the air (or other dielectric gas)
|
|||
|
|
the gap resistance drops. The breakdown ionizes the gas between
|
|||
|
|
electrodes, and the arc begins to ablate and ionize the metal
|
|||
|
|
electrodes themselves. This mixture of ions forms a highly cond-
|
|||
|
|
uctive plasma between the gap electrodes. Without this highly
|
|||
|
|
conductive channel through the gap, efficient tank circuit
|
|||
|
|
oscillation would be impossible. But the plasma also shorts the
|
|||
|
|
gap out. A gap choked with hot ions does not want to open and
|
|||
|
|
allow the capacitors to recharge for the next pulse. The gap is
|
|||
|
|
gets "dirty" with hot ionized gases, and must be quenched.
|
|||
|
|
|
|||
|
|
Quenching typically relies on one or more techniques. The most
|
|||
|
|
common method used is expending the arc out over a series of
|
|||
|
|
gaps. Gaps of this type are know as "series static gaps".
|
|||
|
|
"Static" in this use refers to the fact that the gap is not
|
|||
|
|
actively quenched. The plasma is formed in several locations,
|
|||
|
|
and the voltage at each gap is lowered as more electrodes are
|
|||
|
|
placed in series. Heat, hot ions, and voltage are distributed. As
|
|||
|
|
the tank circuit loses energy to the secondary coil, the voltage
|
|||
|
|
and current in the tank circuit, and likewise across the series
|
|||
|
|
of gaps, drops to the point where the arc is no longer self
|
|||
|
|
sustaining. The arc breaks, and the capacitors are allowed to
|
|||
|
|
recharge for the next pulse.
|
|||
|
|
|
|||
|
|
The second type of quenching technique involves using an air
|
|||
|
|
blast. A high speed air stream is introduced into one or more
|
|||
|
|
gaps. The air stream does not alter the magnetic lines of force
|
|||
|
|
that cause a dielectric breakdown in the gap, so gap distance
|
|||
|
|
remains unchanged. But once an arc is established, the air stream
|
|||
|
|
removes hot ions from between electrodes and physically disrupts
|
|||
|
|
the established arc. The gap is swept clean of hot ions, the arc
|
|||
|
|
breaks, and the capacitors are allowed to recharge.
|
|||
|
|
|
|||
|
|
A third type of quenching used is the magnetically quenched gap.
|
|||
|
|
A strong magnetic field is placed between the electrodes. Since
|
|||
|
|
this field alters the field formed by the high voltage prior to
|
|||
|
|
breakdown of the dielectric in the gap, it may affect the break-
|
|||
|
|
down voltage of a given set of electrodes. Once the gap breaks
|
|||
|
|
down however, the field shape changes. The high current flowing
|
|||
|
|
through the gap generates a field shape associated with the
|
|||
|
|
current. By placing a strong magnetic field in right angles to
|
|||
|
|
the current flow, the arc is disrupted. This disruption tears at
|
|||
|
|
the magnetic lines of force formed by the high current channel
|
|||
|
|
flowing through the gap. The arc is twisted, and broken, without
|
|||
|
|
having to remove ions.
|
|||
|
|
|
|||
|
|
Another type of spark gap called the "quench gap" is used on
|
|||
|
|
coils designed for CW output. This gap was discussed in a
|
|||
|
|
previous post and will not be covered here.
|
|||
|
|
|
|||
|
|
The next stage employed in spark gap technologies is placing a
|
|||
|
|
rotary gap in the circuit. The rotary gap is a mechanical spark
|
|||
|
|
gap usually consisting of revolving disk with electrodes mounted
|
|||
|
|
on the rim. The rotor is spun and the electrodes move in relation
|
|||
|
|
to a set of stationary electrodes nearby. As a moving electrode
|
|||
|
|
comes near a stationary electrode, the gap fires. As is moves
|
|||
|
|
away the arc is stretched and broken. The rotary gap offers the
|
|||
|
|
sophisticated coiler the opportunity to control the pulse in the
|
|||
|
|
tank circuit. A properly designed rotary gap can control the
|
|||
|
|
break rate (bps) and the dwell time.
|
|||
|
|
|
|||
|
|
Rotary gaps are run in two modes, synchronous and asynchronous.
|
|||
|
|
A synchronous gap runs at a fixed speed and is constructed so
|
|||
|
|
that the gap fires in direct relation to the 60 cycle waveform of
|
|||
|
|
the line feed to the capacitors. The point in the waveform where
|
|||
|
|
the gaps are closest can be changed by rotating the synchronous
|
|||
|
|
motor housing or by altering the disk position on the motor
|
|||
|
|
shaft. By carefully matching the output of the supply transformer
|
|||
|
|
to the value of capacitance in the tank circuit, then running
|
|||
|
|
a properly set up synchronous gap, it is possible to have the gap
|
|||
|
|
fire only at the voltage peaks of the 60 cycle input current.
|
|||
|
|
|
|||
|
|
This technique allows the tank circuit to fire only on the
|
|||
|
|
maximum voltage peaks and delivers the pulse from a fully charged
|
|||
|
|
capacitor each time the gap fires. If properly engineered,
|
|||
|
|
synchronous spark gap systems will deliver the largest EMFs to
|
|||
|
|
the secondary coil. They are however, the most finicky, and
|
|||
|
|
difficult to engineer of any spark gap, and require sophisticated
|
|||
|
|
test equipment to set up.
|
|||
|
|
|
|||
|
|
Asynchronous gaps are more common. They work quite well and are
|
|||
|
|
much easier to run. Fixed or variable speed motors may be used,
|
|||
|
|
though variable speed gaps give the builder the most experimental
|
|||
|
|
leeway. Break rates need to be in excess of 400 bps, and I have
|
|||
|
|
found that breaks rates around 450-480 bps give the best
|
|||
|
|
discharge. Since the gap is firing more often than the 60 cycle
|
|||
|
|
waveform switches polarity, more power can be fed into the tank
|
|||
|
|
circuit, as the capacitors can be charged and discharged more
|
|||
|
|
rapidly. Though this system will increase the amount of spark
|
|||
|
|
from the secondary, sparks are generally not as long as with
|
|||
|
|
synchronous gaps.
|
|||
|
|
|
|||
|
|
At higher powers (over 5 kVA) even a rotary gap will not deliver
|
|||
|
|
the quench times required for excellent performance unless it is
|
|||
|
|
very large. If the arc in the spark gap hangs too long (NOT
|
|||
|
|
quenched), it leaves the tank circuit electrically closed. With
|
|||
|
|
the gap still firing energy will backflow from the secondary into
|
|||
|
|
the primary and create continued oscillation in the tank circuit.
|
|||
|
|
The secondary is then suppling energy to maintain the arc in the
|
|||
|
|
spark gap. As power levels build, so does the pressure on the
|
|||
|
|
spark gap. Engineering more sophisticated gap systems is the only
|
|||
|
|
solution in large 1/4 wave coils and Magnifiers.
|
|||
|
|
|
|||
|
|
The easiest solution at 5 kVA is to add a static gap in series
|
|||
|
|
with the rotary. By messing with the gap settings it is not
|
|||
|
|
difficult to develop a gap system that fires smoothly and
|
|||
|
|
quenches well. As power levels increase though static gaps will
|
|||
|
|
be overwhelmed. More sophisticated gaps are required to replace
|
|||
|
|
the static series gaps. Magnetic or airblast gaps must be used in
|
|||
|
|
conjunction with the rotary gap to remove the strain on the
|
|||
|
|
rotary and get the quench times back down.
|
|||
|
|
|
|||
|
|
Somewhere in here I need to cover the Q of spark gaps. Not all
|
|||
|
|
spark gaps have the same Q. I have found that using large series
|
|||
|
|
static gaps with lots of electrodes; the Q of the gap system
|
|||
|
|
decreases as the quench time decreases! Try to avoid static gap
|
|||
|
|
designs with more than 6 - 8 electrodes in series.
|
|||
|
|
|
|||
|
|
As my power levels went up, and my spark gap Qs went down, I
|
|||
|
|
experimented with options to regain performance. I found that by
|
|||
|
|
running static gaps in a combination of series/parallel gave me
|
|||
|
|
good quench times and I regained some lost Q from the arc having
|
|||
|
|
to make so many series jumps. The idea was to split the arc down
|
|||
|
|
into two or three equal paths, reducing the current traveling
|
|||
|
|
each set of series gaps. In this fashion I was able to achieve
|
|||
|
|
excellent quench times with a small rotary running around 5 kVA.
|
|||
|
|
|
|||
|
|
The lesson learned was too many gaps in series kills the Q of a
|
|||
|
|
spark gap. By adding gaps in parallel, and reducing the number of
|
|||
|
|
gaps in series, some Q was regained while power levels increased.
|
|||
|
|
This is a valuable hint in spark gap designs.
|
|||
|
|
|
|||
|
|
Another factor that should be brought into this discussion is the
|
|||
|
|
effects of cooling the electrodes. To start with, I have never
|
|||
|
|
run even a simple static gap without some airflow. My first few
|
|||
|
|
really good static gaps were constructed inside of PVC pipe
|
|||
|
|
sections with a 5" muffin fan on top. The fan did not supply
|
|||
|
|
sufficient air to disrupt the arc, but did assist in removing hot
|
|||
|
|
ions, and cooling the electrodes down. This allows for longer run
|
|||
|
|
times. As my work progressed I realized that reducing the
|
|||
|
|
electrode temperature, while not actually quenching the gap,
|
|||
|
|
reduces the amount of metal ions introduced into the arc, and
|
|||
|
|
makes the gap easier to quench with an airblast or magnets.
|
|||
|
|
|
|||
|
|
I am going to cut this off here. I feel I have covered most of
|
|||
|
|
the basics, and thrown a few ideas out into the cyberspace. I
|
|||
|
|
would be more than happy to expand on spark gap technologies at
|
|||
|
|
any time should somebody have any specific questions, comments,
|
|||
|
|
problems, or corrections. Remember, armchair debate is no
|
|||
|
|
substitute for actually going out an experimenting with a few
|
|||
|
|
live systems, and I am always hoping someone will tell me a
|
|||
|
|
better way to do it!
|
|||
|
|
|
|||
|
|
One final safety note. Spark gaps are loud, and emit a lot
|
|||
|
|
of hard UV radiation. Wear hearing protection as required, and
|
|||
|
|
never stare at an operating spark gap without welding goggles.
|
|||
|
|
To examine the arc on large coils, a sun observation filter
|
|||
|
|
on a small telescope will tell you if your gaps are quenching.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 773 Date: 11-15-93 22:57
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
Rotary gaps are run in two modes, synchronous and asynchronous.
|
|||
|
|
A synchronous gap runs at a fixed speed and is constructed so
|
|||
|
|
that the gap fires in direct relation to the 60 cycle waveform of
|
|||
|
|
the line feed to the capacitors. The point in the waveform where
|
|||
|
|
the gaps are closest can be changed by rotating the synchronous
|
|||
|
|
motor housing or by altering the disk position on the motor
|
|||
|
|
shaft. By carefully matching the output of the supply transformer
|
|||
|
|
to the value of capacitance in the tank circuit, then running
|
|||
|
|
a properly set up synchronous gap, it is possible to have the gap
|
|||
|
|
fire only at the voltage peaks of the 60 cycle input current.
|
|||
|
|
|
|||
|
|
This technique allows the tank circuit to fire only on the
|
|||
|
|
maximum voltage peaks and delivers the pulse from a fully charged
|
|||
|
|
capacitor each time the gap fires. If properly engineered,
|
|||
|
|
synchronous spark gap systems will deliver the largest EMFs to
|
|||
|
|
the secondary coil. They are however, the most finicky, and
|
|||
|
|
difficult to engineer of any spark gap, and require sophisticated
|
|||
|
|
test equipment to set up.
|
|||
|
|
|
|||
|
|
Asynchronous gaps are more common. They work quite well and are
|
|||
|
|
much easier to run. Fixed or variable speed motors may be used,
|
|||
|
|
though variable speed gaps give the builder the most experimental
|
|||
|
|
leeway. Break rates need to be in excess of 400 bps, and I have
|
|||
|
|
found that breaks rates around 450-480 bps give the best
|
|||
|
|
discharge. Since the gap is firing more often than the 60 cycle
|
|||
|
|
waveform switches polarity, more power can be fed into the tank
|
|||
|
|
circuit, as the capacitors can be charged and discharged more
|
|||
|
|
rapidly. Though this system will increase the amount of spark
|
|||
|
|
from the secondary, sparks are generally not as long as with
|
|||
|
|
synchronous gaps.
|
|||
|
|
|
|||
|
|
At higher powers (over 5 kVA) even a rotary gap will not deliver
|
|||
|
|
the quench times required for excellent performance unless it is
|
|||
|
|
very large. If the arc in the spark gap hangs too long (NOT
|
|||
|
|
quenched), it leaves the tank circuit electrically closed. With
|
|||
|
|
the gap still firing energy will backflow from the secondary into
|
|||
|
|
the primary and create continued oscillation in the tank circuit.
|
|||
|
|
The secondary is then suppling energy to maintain the arc in the
|
|||
|
|
spark gap. As power levels build, so does the pressure on the
|
|||
|
|
spark gap. Engineering more sophisticated gap systems is the only
|
|||
|
|
solution in large 1/4 wave coils and Magnifiers.
|
|||
|
|
|
|||
|
|
The easiest solution at 5 kVA is to add a static gap in series
|
|||
|
|
with the rotary. By messing with the gap settings it is not
|
|||
|
|
difficult to develop a gap system that fires smoothly and
|
|||
|
|
quenches well. As power levels increase though static gaps will
|
|||
|
|
be overwhelmed. More sophisticated gaps are required to replace
|
|||
|
|
the static series gaps. Magnetic or airblast gaps must be used in
|
|||
|
|
conjunction with the rotary gap to remove the strain on the
|
|||
|
|
rotary and get the quench times back down.
|
|||
|
|
|
|||
|
|
Somewhere in here I need to cover the Q of spark gaps. Not all
|
|||
|
|
spark gaps have the same Q. I have found that using large series
|
|||
|
|
static gaps with lots of electrodes; the Q of the gap system
|
|||
|
|
decreases as the quench time decreases! Try to avoid static gap
|
|||
|
|
designs with more than 6 - 8 electrodes in series.
|
|||
|
|
|
|||
|
|
As my power levels went up, and my spark gap Qs went down, I
|
|||
|
|
experimented with options to regain performance. I found that by
|
|||
|
|
running static gaps in a combination of series/parallel gave me
|
|||
|
|
good quench times and I regained some lost Q from the arc having
|
|||
|
|
to make so many series jumps. The idea was to split the arc down
|
|||
|
|
into two or three equal paths, reducing the current traveling
|
|||
|
|
each set of series gaps. In this fashion I was able to achieve
|
|||
|
|
excellent quench times with a small rotary running around 5 kVA.
|
|||
|
|
|
|||
|
|
The lesson learned was too many gaps in series kills the Q of a
|
|||
|
|
spark gap. By adding gaps in parallel, and reducing the number of
|
|||
|
|
gaps in series, some Q was regained while power levels increased.
|
|||
|
|
This is a valuable hint in spark gap designs.
|
|||
|
|
|
|||
|
|
Another factor that should be brought into this discussion is the
|
|||
|
|
effects of cooling the electrodes. To start with, I have never
|
|||
|
|
run even a simple static gap without some airflow. My first few
|
|||
|
|
really good static gaps were constructed inside of PVC pipe
|
|||
|
|
sections with a 5" muffin fan on top. The fan did not supply
|
|||
|
|
sufficient air to disrupt the arc, but did assist in removing hot
|
|||
|
|
ions, and cooling the electrodes down. This allows for longer run
|
|||
|
|
times. As my work progressed I realized that reducing the
|
|||
|
|
electrode temperature, while not actually quenching the gap,
|
|||
|
|
reduces the amount of metal ions introduced into the arc, and
|
|||
|
|
makes the gap easier to quench with an airblast or magnets.
|
|||
|
|
|
|||
|
|
I am going to cut this off here. I feel I have covered most of
|
|||
|
|
the basics, and thrown a few ideas out into the cyberspace. I
|
|||
|
|
would be more than happy to expand on spark gap technologies at
|
|||
|
|
any time should somebody have any specific questions, comments,
|
|||
|
|
problems, or corrections. Remember, armchair debate is no
|
|||
|
|
substitute for actually going out an experimenting with a few
|
|||
|
|
live systems, and I am always hoping someone will tell me a
|
|||
|
|
better way to do it!
|
|||
|
|
|
|||
|
|
One final safety note. Spark gaps are loud, and emit a lot
|
|||
|
|
of hard UV radiation. Wear hearing protection as required, and
|
|||
|
|
never stare at an operating spark gap without welding goggles.
|
|||
|
|
To examine the arc on large coils, a sun observation filter
|
|||
|
|
on a small telescope will tell you if your gaps are quenching.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 774 Date: 11-16-93 02:40
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
I hope you find some of the information that I posted on spark
|
|||
|
|
gaps useful. In the TESLA.ZIP file that I included with the copy
|
|||
|
|
of the video tape there are GIF files that I made up showing
|
|||
|
|
two of the spark gaps designs that I use, with related text files
|
|||
|
|
on each. My airblast gap design on that disk is down and dirty
|
|||
|
|
simple, ultra high Q, and gives incredible quench times. If you
|
|||
|
|
are running neons up to 4 kVA and want to squeeze every inch of
|
|||
|
|
spark out of the coil, this is a gap you might want to look at.
|
|||
|
|
|
|||
|
|
The air can be supplied cheaply with an old diaphragm type com-
|
|||
|
|
pressor. I have seen reconditioned compressors of this type for
|
|||
|
|
around $40-$50 in the surplus catalogs (Surplus Center 1-800-488-
|
|||
|
|
3407). What I did to obtain a long blast to quench the gap was
|
|||
|
|
get an old propane tank and install a ball valve in the line to
|
|||
|
|
the gap. It takes about 5 min to charge the tank with the
|
|||
|
|
diaphragm type compressor, and you get about 90 seconds of
|
|||
|
|
quenching. I used a RV trailer type tank, but you can gang them
|
|||
|
|
up, or use a larger stationary type tank for longer run times.
|
|||
|
|
|
|||
|
|
You will see the same basic gap shown in the video (stripped of
|
|||
|
|
the air injection nozzle) as the safety gap for the pole pig.
|
|||
|
|
I have two extra electrodes that I machined that are identical
|
|||
|
|
to the two shown in the video. If you are interested I will let
|
|||
|
|
you have them for $10.00. The material is machine grade brass,
|
|||
|
|
and the electrodes weigh 1/4 lb. each, so they sink a lot of
|
|||
|
|
heat. Run with the air blast they don't even warm up.
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2937 Date: 11-16-93 10:49
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
DH> Thanks for the clarification re: the Schedule 40 pipe - I
|
|||
|
|
DH> had always looked at it as being heavier so therefore
|
|||
|
|
DH> "better" - never thought of the actual material as being a
|
|||
|
|
DH> liability. What about ABS - is there any difference with
|
|||
|
|
DH> that?
|
|||
|
|
|
|||
|
|
I don't have any experience with ABS plastic secondaries. I have
|
|||
|
|
seen some, but had nothing that I could compare to. Look up the
|
|||
|
|
RF dissipation factor and that should give you some idea. Off the
|
|||
|
|
top of my head, I would GUESS that ABS would work better than
|
|||
|
|
PVC; not because I think ABS is any better, but because I know
|
|||
|
|
PVC just couldn't be much worse. If I were using ABS I would dry
|
|||
|
|
and seal the plastic like PVC.
|
|||
|
|
|
|||
|
|
DH> Anyway, we will probably do a couple capacitors in the next
|
|||
|
|
DH> week or so. Like I said, I have an OK vacuum pump ( I do
|
|||
|
|
DH> graphic arts and printing ) and can pump it out so that
|
|||
|
|
DH> should improve things.
|
|||
|
|
|
|||
|
|
Good luck on the rolled caps, and look for some different
|
|||
|
|
capacitor designs in the next few days.
|
|||
|
|
|
|||
|
|
DH> Anyway, many many thanks for your time and help!
|
|||
|
|
|
|||
|
|
No problem, glad to be of assistance.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 799 Date: 11-16-93 14:05
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
DH> I was talking with one of the people and they agreed to
|
|||
|
|
DH> start on a smaller coil - I was thinking in the order of 4"
|
|||
|
|
DH> diameter and about 3' long.
|
|||
|
|
|
|||
|
|
The aspect ratio (height to width ratio) is important. The
|
|||
|
|
planned coil has an aspect ratio of 9:1 (36" long, 4" diam.)
|
|||
|
|
this should be reduced to no more than 5:1 on a 4" diam. coil.
|
|||
|
|
6" coils work best with 4:1 aspect ratio, anything larger 3:1.
|
|||
|
|
|
|||
|
|
******(cut from another part of a post)*******
|
|||
|
|
The coil should be wound with good quality magnet wire. I use
|
|||
|
|
double Formvar enamel coated magnet wire. Magnet wire gives you
|
|||
|
|
maximum inductance. A coil should have over 900 turns, but not
|
|||
|
|
too much over 1000 turns. There is a little leeway here. Select a
|
|||
|
|
gauge of wire which will allow the aspect ratio and number of
|
|||
|
|
turns to fall within this range.
|
|||
|
|
**********************************************
|
|||
|
|
|
|||
|
|
DH> OK - I made an "editorial decision" today to go for a 6"
|
|||
|
|
DH> diameter form and make it 24" long. I just was out running
|
|||
|
|
DH> errands and got 1,500' of 22 gauge Heavy Formvar insulated
|
|||
|
|
DH> magnet wire so with a diameter of 0.0253, this works out to
|
|||
|
|
DH> 948 turns - right in the ballpark that you suggested in
|
|||
|
|
DH> another part of this post.
|
|||
|
|
|
|||
|
|
Perfect!
|
|||
|
|
|
|||
|
|
DH> I think the other people were thinking in the realm of the
|
|||
|
|
DH> normal misconception of Tesla coils as being long and skinny
|
|||
|
|
DH> but I guess that would make them longer than 1/4 wave...
|
|||
|
|
|
|||
|
|
Long skinny coils do not couple well with the primary. What ends
|
|||
|
|
up happening is that the primary excites only the bottom half of
|
|||
|
|
the secondary, and the top half of the windings are just pushed
|
|||
|
|
along by the bottom turns. Long skinny coils get hot at the base,
|
|||
|
|
a sign of poor Q. Also they are more subject to splitting and
|
|||
|
|
breakdown. By keeping the secondary coil within the given specs,
|
|||
|
|
you get a nice low frequency coil, and the field flux from the
|
|||
|
|
primary will sweep the entire secondary coil from the bottom turn
|
|||
|
|
to the top turn. This way the energy exchange to the secondary is
|
|||
|
|
distributed through the entire length of the wire, not just
|
|||
|
|
forced into the bottom 300 or so turns. Your decision to go to a
|
|||
|
|
slightly larger diam. coil form, and keep the aspect ratio within
|
|||
|
|
the specs I recommend, is a good one. Use a large primary coil.
|
|||
|
|
|
|||
|
|
BTW 1/4 wave resonate frequency is much more dependant on the
|
|||
|
|
length of wire than the dimensions of the coil form. A form that
|
|||
|
|
is long & skinny, or short and fat, makes no difference to the
|
|||
|
|
1/4 wavelength of wire. But it makes all of the difference in the
|
|||
|
|
world when that wire is intended to be a high Q Tesla coil. Long
|
|||
|
|
skinny coils have lower Q, higher corona loss, lower breakdown
|
|||
|
|
voltage, and poor coupling coefficients; but will have about the
|
|||
|
|
same 1/4 wave frequency as the same length of wire wound on a
|
|||
|
|
shorter, fatter coil form. The coil form with aspect ratios and
|
|||
|
|
number of turns that fall into the design specs I gave are
|
|||
|
|
reliably better performers.
|
|||
|
|
|
|||
|
|
DH> OK - I wonder if it would be feasible to make it with
|
|||
|
|
DK> continuously variable gap size - something with threaded
|
|||
|
|
DK> plastic rods...
|
|||
|
|
|
|||
|
|
Experiment away, and get some photos or video if you can. I would
|
|||
|
|
be happy to trade tapes or photos even (one for one), and see
|
|||
|
|
something new. As much as I do, I never tire of seeing more.
|
|||
|
|
|
|||
|
|
DH> I think that since we are starting with neon sign x-formers,
|
|||
|
|
DH> we can just use the standard 6" PVC gap you showed - aren't
|
|||
|
|
DH> going to be running too much power through it <yet>
|
|||
|
|
|
|||
|
|
All of the gaps that I showed, and use, are good ones. The
|
|||
|
|
cylinder static gap is a solid performer. I sent along a GIF
|
|||
|
|
diagram of this gap showing the internal construction, and a
|
|||
|
|
related text file. This project can be built in a few hours with
|
|||
|
|
a minimum of shop equipment for around $30.00 if you buy all the
|
|||
|
|
parts new. Set the gaps between electrodes at about .035 of an
|
|||
|
|
inch, or a little more, for 12 kv neons power supplies. The one
|
|||
|
|
disadvantage of this gap is that the electrodes are fixed and
|
|||
|
|
cannot be adjusted once bedded in epoxy, but you can jump to any
|
|||
|
|
terminal on the gap with ease, changing the number of gaps used
|
|||
|
|
in the circuit. Properly constructed, I have gotten 5' discharges
|
|||
|
|
from a coil powered with neons using just a single cylinder
|
|||
|
|
static gap unit, and the gap electrodes did not melt or pit.
|
|||
|
|
|
|||
|
|
Coil forms, regardless of material, should be as thin as
|
|||
|
|
possible. Schedule 40 is thick, and is rated for pressure
|
|||
|
|
use. Try to locate the thinner "drain" pipe or "flume duct" PVC
|
|||
|
|
or other thin wall plastic. If PVC is used, it MUST be dry (baked
|
|||
|
|
is preferred) and well sealed with a low loss sealant like poly-
|
|||
|
|
urethane or two part epoxy. (RQ previous post)
|
|||
|
|
|
|||
|
|
DH> OK - there is some pretty thin wall stuff in our local "Home
|
|||
|
|
DH> Center" store - I was worried about mechanical strength
|
|||
|
|
DH> though - I can deflect it with little pressure.
|
|||
|
|
|
|||
|
|
You'll have to trust me on this one. Handle the secondary with
|
|||
|
|
some care, just don't drop or sit on it. <Grin>. If it is built
|
|||
|
|
properly with stiff plastic end caps, tightly wound, and well
|
|||
|
|
sealed, it will be plenty strong enough to handle casually.
|
|||
|
|
|
|||
|
|
Couple of other notes. I have a lathe too. After spending hours
|
|||
|
|
setting up wire guides and tensioners, I decided it is much
|
|||
|
|
easier and faster to wind coils by hand. The coils turn out
|
|||
|
|
better too. It may take a little practice, but it is well worth
|
|||
|
|
the time sitting in front of the coil form and laying down the
|
|||
|
|
turns by hand, even with thin wire. I can wind a 6" coil in about
|
|||
|
|
45 minutes or less. A first time winder should figure no more
|
|||
|
|
than a couple hours. You will spend about the same amount of time
|
|||
|
|
figuring out wire guides and tensioners for the lathe set up, and
|
|||
|
|
the coil won't be any better quality.
|
|||
|
|
|
|||
|
|
DO use the lathe to apply sealer. I set up a couple of heat lamps
|
|||
|
|
and a small fan to speed up the dry time, and can get 8 coats
|
|||
|
|
down in four hours. By constantly rotating the coil form you get
|
|||
|
|
a nice smooth finish that looks and works great!
|
|||
|
|
|
|||
|
|
My first "performing" coil was built to nearly the exact specs
|
|||
|
|
for the 6" coil you described as being on the drawing board. The
|
|||
|
|
coil has held up and still holds a key place in my arsenal. It
|
|||
|
|
has survived massive overloads, been used in transmission
|
|||
|
|
experiments, as an end resonator on the magnifier, and as a pick
|
|||
|
|
up coil to detect RF currents in my house wiring while
|
|||
|
|
experimenting with Tesla grounds. You can't hardly go wrong with
|
|||
|
|
one, or even two, coils like this.
|
|||
|
|
|
|||
|
|
You also mentioned you priced teflon covered wire. This stuff
|
|||
|
|
makes killer secondaries, but like you said, "You paid HOW
|
|||
|
|
MUCH???". Shop local HAMfests, this wire shows up by the spool at
|
|||
|
|
greatly reduced prices in these flea markets.
|
|||
|
|
|
|||
|
|
And again, if you have any problems, questions, or need
|
|||
|
|
additional advice, feel free to ask. I look forward to hearing
|
|||
|
|
about your progress and results.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 800 Date: 11-16-93 14:56
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Last week I posted on recovering and unpotting "dead" neon
|
|||
|
|
transformer cores for use in high voltage power supplies.
|
|||
|
|
|
|||
|
|
It ocurred to me that those people in warmer parts of the country
|
|||
|
|
will not have days cold enough to freeze the tar potting solid
|
|||
|
|
enough to chip away cleanly. The tar has to be at least 20
|
|||
|
|
degrees F or colder to chip cleanly and separate away from the
|
|||
|
|
warmed core.
|
|||
|
|
|
|||
|
|
I hope you thought of the obvious solution if the weather does
|
|||
|
|
not cooperate in your area. Put the tar block in the freezer
|
|||
|
|
overnight, then proceed with unpotting.
|
|||
|
|
|
|||
|
|
Also I tracked down the problem with my system as far as the
|
|||
|
|
ASCII characters in the pfc capacitance formula is concerned.
|
|||
|
|
My PKZIP is repeatedly stripping out selective ASCII characters
|
|||
|
|
when I test it. The divisor of that particular formula is
|
|||
|
|
supposed to contain the greek letter pi in it. If you have saved
|
|||
|
|
the post, and the formula has the letter pi stripped from the
|
|||
|
|
divisor (which I believe is the case) please make a note of it.
|
|||
|
|
Without pi in this formula the capacitance given by the equation
|
|||
|
|
gets rather large... I sent up a correction, and the problem was
|
|||
|
|
repeated.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 912 Date: 11-16-93 15:54
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> Tesla "Q" Factors
|
|||
|
|
|
|||
|
|
RQ>Since some people are saving these posts to disk, and at least
|
|||
|
|
>one other person (Dave Halliday) is going to embark on some coil
|
|||
|
|
>building. I thought I would take a moment and discuss some Tesla
|
|||
|
|
>theory that directly relates to coil efficiencies. The subject
|
|||
|
|
>is the "Q" factor.
|
|||
|
|
|
|||
|
|
Thanks again for the info!
|
|||
|
|
|
|||
|
|
>recently gutted. When I inquired, he stated he had to switch to
|
|||
|
|
>an ungrounded, wooden, control cabinet because he was drawing
|
|||
|
|
>sparks to fingers when he touched the controls...
|
|||
|
|
|
|||
|
|
I also recall stories about ham radio shacks having this problem.
|
|||
|
|
|
|||
|
|
Used to work for the public aquarium in Boston and we had grounding
|
|||
|
|
problems like you wouldn't believe - I was responsible for all of the
|
|||
|
|
non-living exhibits ( PA and AV stuff ) and the ground at every single
|
|||
|
|
outlet was at a different potential than any other outlet. I once found
|
|||
|
|
50 volts difference between two located 20' apart... A guide was
|
|||
|
|
setting up a temporary exhibit and used both outlets for their
|
|||
|
|
equipment. They got a bit of a rude awakening that day <grin>
|
|||
|
|
|
|||
|
|
TTYL - Dave <20>:-)
|
|||
|
|
b QMPro 1.51 b Every time I ATDT her, she ATH0's on me...
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- WM v3.10/92-0434
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 913 Date: 11-16-93 17:08
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> GD> This is geting out of hand, Richard.
|
|||
|
|
|
|||
|
|
RQ>Well Guy, I need a place to put all of my stuff where it won't
|
|||
|
|
>get rained on. Any other bright ideas?
|
|||
|
|
|
|||
|
|
RQ>I have about $5000.00 worth of Tesla equip. ($15,000
|
|||
|
|
replacement
|
|||
|
|
>cost), about $5000.00 worth of chemistry equip, not to mention
|
|||
|
|
>boxes of homemade pyrotechinics equipment (ball mill, star
|
|||
|
|
>presses, rocket ramming table, drying racks, rolls of paper and
|
|||
|
|
>tubing, mixing containers, sieves, etc.) I also buy, sell, and
|
|||
|
|
>build/rebuild/repair Vespa scooters; own three now, plus parts of
|
|||
|
|
>a forth, plus a workbench of special tools for engines, frames,
|
|||
|
|
>wheels, etc.
|
|||
|
|
|
|||
|
|
RQ>I would like to mess around with some hard vacuum equipment,
|
|||
|
|
>and do some bulb blowing/tube bending... and I need a place to
|
|||
|
|
>put my shop tools (band saw, drill press, belt sander, table saw,
|
|||
|
|
>air compressor, etc.)
|
|||
|
|
|
|||
|
|
Geeez Richard - and I thought *I* had too much going on at once what
|
|||
|
|
with my boat, woodworking shop, metal shop ( lathe, wirewelder and
|
|||
|
|
torches ), music studio, homebrewing, BBS, computers and printing...
|
|||
|
|
|
|||
|
|
This takes the cake <grin>
|
|||
|
|
|
|||
|
|
b QMPro 1.51 b Tagline Lite: Not funny, but better for you...
|
|||
|
|
|
|||
|
|
-!- WM v3.10/92-0434
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
< CONTINUE HERE - KU >
|
|||
|
|
|
|||
|
|
|
|||
|
|
111983 1438
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 927 Date: 11-19-93 14:38
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Toroid Discharge Terminals
|
|||
|
|
|
|||
|
|
Another feature of the "classic" Tesla coil design is the sphere
|
|||
|
|
or ball discharge terminal. Tesla clearly was using spheres while
|
|||
|
|
he was developing the Colorado Springs oscillator, but during his
|
|||
|
|
work there he made the discovery of toroids. Photographs of the
|
|||
|
|
Colorado Springs machine clearly shows a brass toroid as part of
|
|||
|
|
the antenna mast to prevent corona leakage and premature breakout
|
|||
|
|
from the top of the extra coil.
|
|||
|
|
|
|||
|
|
As we examine photos of the Wardenclyff machine he built on Long
|
|||
|
|
Island, it is clear that the entire tower was constructed to
|
|||
|
|
carry the giant toroid terminal. I do not have verifiable infor-
|
|||
|
|
mation as to the exact size of this terminal, but it is easily
|
|||
|
|
over 50' in diameter. Probably closer to 75-100'. Toroids perform
|
|||
|
|
several functions as discharge terminals on Tesla coils.
|
|||
|
|
|
|||
|
|
They provide a large top capacitance. This top capacitance helps
|
|||
|
|
"cancel" the high inductance in the secondary coil, and increase
|
|||
|
|
throughput in the system.
|
|||
|
|
|
|||
|
|
They break down at much higher voltages than other shapes. The
|
|||
|
|
donut shaped field distributes the charge density. Higher
|
|||
|
|
voltages must reached before electrical breakdown occurs. To the
|
|||
|
|
coiler this means longer, higher voltage spark. For those of you
|
|||
|
|
that have my video, you can see a 30% increase in spark lenghts
|
|||
|
|
with no change to input power, the only thing I did was add a
|
|||
|
|
larger toroid and retune the system.
|
|||
|
|
|
|||
|
|
Toroids sever the coupling. This may be a controversial statement
|
|||
|
|
on my part. But from what I have seen, appears to be true. A
|
|||
|
|
sphere discharge terminal does not want to separate from the
|
|||
|
|
field flux interactions between the primary and secondary. The
|
|||
|
|
primary field flux wants to couple the sphere discharger into the
|
|||
|
|
system as if it were another turn of the secondary. The spark
|
|||
|
|
from the discharger will frequently follow these lines of force,
|
|||
|
|
and seek to strike back to the primary. The spark discharge bends
|
|||
|
|
back down, and aligns itself with the magnetic lines of force.
|
|||
|
|
|
|||
|
|
While this may be useful if you wish to visualize the size and
|
|||
|
|
shape of the field, it does nothing to increase your spark
|
|||
|
|
lengths. A large toroid on the other hand will establish a field
|
|||
|
|
identity that interacts destructively with the primary/secondary
|
|||
|
|
field interaction. Since this destructive interaction occurs
|
|||
|
|
above the top turns of the secondary is does not affect the coil
|
|||
|
|
performance or ability to process energy. It does however allow
|
|||
|
|
the spark to leave the system unaffected by the primary/secondary
|
|||
|
|
lines of force. This has the effect of allowing a clean getaway
|
|||
|
|
for the discharge and promotes those long strikes to the ground
|
|||
|
|
or other more distant objects.
|
|||
|
|
|
|||
|
|
Toriods also have the beneficial effect of lowering the frequency
|
|||
|
|
of the secondary coil dramatically. By loading a large toriod on
|
|||
|
|
a relatively small coil, a very low secondary frequency is
|
|||
|
|
reached. Low frequency in Tesla systems means long spark. This
|
|||
|
|
way a small coil can give big coil performance. Because of this
|
|||
|
|
ability of the toriod to drop the frequency of the secondary to
|
|||
|
|
such low frequencies, it is important to have a very large
|
|||
|
|
primary available that can be tapped out to over 10-12 turns in
|
|||
|
|
order to regain the system tune. Larger capacitors may be added,
|
|||
|
|
but my experience shows that no additional power or capacitance
|
|||
|
|
is required to get big increases in spark production.
|
|||
|
|
|
|||
|
|
Clearly the toriod is the ultimate in high Q dischargers and
|
|||
|
|
radiators in Tesla systems. Now go out and buy one. I can hear
|
|||
|
|
Dave Halliday now..... "You Paid _HOW MUCH?_"!!!
|
|||
|
|
Yup, spun aluminum toroids are available commercially, and they
|
|||
|
|
run hundreds, even thousands of dollars each. My 20" wide by 5"
|
|||
|
|
high commercial toriod ran me over 350 clams. My ten inch
|
|||
|
|
secondary needs a toroid at least twice as big to achieve optimum
|
|||
|
|
performance, and as commercial toroids get larger, the price
|
|||
|
|
increases exponentially. I priced a 40" toroid for my coil at
|
|||
|
|
$2000.00 not including shipping, and they gave me a six month
|
|||
|
|
deliverly time...
|
|||
|
|
|
|||
|
|
So I built one for $35.00, and it works GREAT! I will never spend
|
|||
|
|
another penny on commercial spun aluminum toroids. Here are the
|
|||
|
|
brief instructions:
|
|||
|
|
|
|||
|
|
I buy the 4" or 6" diam. polyproplyene flexible black plastic
|
|||
|
|
drain piping. This is made out of ridged plastic, so it does not
|
|||
|
|
have a smooth surface, but it easy to bend to form circles of
|
|||
|
|
varying diameters.
|
|||
|
|
|
|||
|
|
I cut the flange off with a sharp knife, match the ends, and tape
|
|||
|
|
them together with wide plastic tape. Once a large ring is
|
|||
|
|
formed, I cover the entire surface with wide plastic tape to
|
|||
|
|
smooth out the ridges in the material. The goal is to have an
|
|||
|
|
even, smooth, surface. The tape choice helps with this con-
|
|||
|
|
struction, Mylar and other tapes have no stretch, and are
|
|||
|
|
difficult to work with as they wrinkle. I shopped several stores
|
|||
|
|
before I found a stretchy material similar to electrical tape.
|
|||
|
|
Tape is applied in overlapping strips, or bands, around the drain
|
|||
|
|
pipe 4" or 6" cross section. Some surface irregularities are OK.
|
|||
|
|
|
|||
|
|
Once the ring is smoothed with a layer of plastic tape, I retape
|
|||
|
|
the entire ring with aluminum plumbers tape. This tape comes in
|
|||
|
|
two standard widths, I bought a large roll of each. Apply strips
|
|||
|
|
of plumbers tape over the prepared surface, make sure the entire
|
|||
|
|
surface is covered, and press out any wrinkles with a fingernail
|
|||
|
|
or tool. You should now have an aluminized ring. Cut out a circle
|
|||
|
|
of thin masonite, wood paneling, or thin plastic so that it will
|
|||
|
|
friction fit in the center of the alumunized ring. Place some
|
|||
|
|
blocks up under this panel, set the ring in place, and tape the
|
|||
|
|
edges all around on both sides with aluminum tape to hold it in
|
|||
|
|
place. Spray adhesive and heavy duty foil are used to cover both
|
|||
|
|
sides if the center plate. Roll out all wrinkles with a socket or
|
|||
|
|
a wood dowel. Works great, about 1/100th the cost.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2 Date: 16 Nov 93 20:33:44
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Well, lets see; I covered basic spark gaps yesterday, next on
|
|||
|
|
the list would have to be pulse capacitance. I posted a two part
|
|||
|
|
message last month sometime detailing construction of a rolled
|
|||
|
|
type pulse discharge capacitor. Since the detail of this partic-
|
|||
|
|
ular unit was pretty well covered, I will focus on other homemade
|
|||
|
|
types; the flat stacked plate type capacitor, a little on the
|
|||
|
|
salt water cap, and a little on capacitor theory as it applies to
|
|||
|
|
Tesla coils.
|
|||
|
|
|
|||
|
|
I have seen several types of homemade stacked plate capacitors.
|
|||
|
|
The two types differ as to the orientation of the plate stacks.
|
|||
|
|
Some are stacked vertically, others are stacked horizontally.
|
|||
|
|
Before I go into construction details I should cover some of the
|
|||
|
|
advantages of flat stacked plate caps for use in Tesla coils and
|
|||
|
|
other high voltage applications.
|
|||
|
|
|
|||
|
|
Flat plate caps have no inductance. Rolled caps contain two or
|
|||
|
|
more plates which are tightly rolled up. Rolled plates exhibit
|
|||
|
|
some properties of coils, they contain a certain degree of self
|
|||
|
|
inductance. This limits the size of the rolled cap in Tesla
|
|||
|
|
applications. As plates grow in size, the self inductance grows,
|
|||
|
|
and the caps exhibit self-resonance that will interfere destruct-
|
|||
|
|
ively with the oscillation of the Tesla tank circuit. The rolled
|
|||
|
|
cap that I posted about previously, is about as large as you can
|
|||
|
|
get in a single unit without having self-resonance drop below 1
|
|||
|
|
megahertz.
|
|||
|
|
|
|||
|
|
Flat plate caps are better adapted for pulse applications. Rolled
|
|||
|
|
caps have to discharge a long plate. The further away the free
|
|||
|
|
end of the plate is from the high current terminal, the longer it
|
|||
|
|
takes for the cap to discharge. In essence this distance is also
|
|||
|
|
an extension of the tank circuit wiring, as the plate gets longer
|
|||
|
|
losses increase. Again the rolled capacitor I posted previously
|
|||
|
|
is pushing the design limits of efficiency in this area. As the
|
|||
|
|
rolled cap gets larger, efficiency of pulsing drops off.
|
|||
|
|
|
|||
|
|
Flat plate caps can be constructed to handle higher voltages.
|
|||
|
|
Rolled caps have efficiency limits in individual units as to the
|
|||
|
|
breakdown voltage. A single dielectric is used per plate. If
|
|||
|
|
dielectrics are made thicker, efficiency drops off, if made
|
|||
|
|
thinner efficiency increases, but they break down. Using standard
|
|||
|
|
materials, the rolled cap I posted about is at the edge of this
|
|||
|
|
design limit as well.
|
|||
|
|
|
|||
|
|
Flat plate caps can be built for larger capacitance. The rolled
|
|||
|
|
cap, because of the design constraints listed above, won't give
|
|||
|
|
you much additional capacitance without increases in losses,
|
|||
|
|
problems with self-resonance, and lowering of the capacitor Q.
|
|||
|
|
|
|||
|
|
The rolled cap that I posted is a good unit. I have built nearly
|
|||
|
|
20 of these caps, and I use them a lot. But do not look to expand
|
|||
|
|
much on this design. It has passed through several improvements
|
|||
|
|
and I really think it is pushing the design limits in all of the
|
|||
|
|
important areas. Next we need to look at the flat plate cap, as
|
|||
|
|
there is much to be done yet, but first look at the dielectric.
|
|||
|
|
|
|||
|
|
The best Tesla capacitor dielectric is low density polyethylene
|
|||
|
|
plastic. Whether you build rolled, stacked plate, or salt water
|
|||
|
|
caps you should look hard at this plastic before settling on
|
|||
|
|
anything else. It has an extraordinarily low RF dissipation
|
|||
|
|
factor for the cost. The actual "in use" dielectric constant on
|
|||
|
|
homemade caps using this plastic is right around 2. This is a
|
|||
|
|
little lower than the book value, but homemade applications of
|
|||
|
|
this dielectric rarely have the close plate bonding that are
|
|||
|
|
achieved commercially with clean room vacuum presses.
|
|||
|
|
|
|||
|
|
This dielectric melts at 100 deg. C. But because of the very low
|
|||
|
|
dissipation factor the plastic is subject to very little in-
|
|||
|
|
ductive heating. There is little loss, therefore little heating.
|
|||
|
|
When using this plastic however, it is imperative to cover in
|
|||
|
|
mineral oil to distribute any heat that is formed, suppress
|
|||
|
|
corona and displace air. Plastic caps not covered in oil are
|
|||
|
|
guaranteed to fail in seconds. Plates, dielectric, and oil MUST
|
|||
|
|
BE CLEAN!... BTW The cheapest and most common plate material is
|
|||
|
|
aluminum. In the rolled cap, aluminum flashing is available
|
|||
|
|
precut in a perfect plate width, and there are other widths
|
|||
|
|
available. Flat plate caps can use flashing, but it is frequently
|
|||
|
|
more cost effective to use foil.
|
|||
|
|
|
|||
|
|
Now that we have established a few basics, lets talk plate cap
|
|||
|
|
design. The first type of flat stacked plate requires the cap be
|
|||
|
|
pumped down to a pretty hard vacuum to remove air. This is the
|
|||
|
|
horizontal stacked plate capacitor. Typically these are built in
|
|||
|
|
a Tupperware type storage box. Plastic, plate, plastic, plate
|
|||
|
|
etc. are stacked one atop the other to build up the value. The
|
|||
|
|
breakdown voltage is directly related to the dielectric thick-
|
|||
|
|
ness used. 60 mil poly sheet is recommended and will have a
|
|||
|
|
breakdown voltage in the Tesla tank circuit between 11-17 kv
|
|||
|
|
rms input voltage depending on the quality of material, and the
|
|||
|
|
cleanliness of the construction.
|
|||
|
|
|
|||
|
|
Once the box is filled, and all parallel plate connections are
|
|||
|
|
made, high current busses are brought through the lid of the
|
|||
|
|
container and sealed airtight with hot glue. Then the lid is
|
|||
|
|
snapped on, and it too is sealed with a bead of hot glue around
|
|||
|
|
the edges. The next part is important: A single hole is made in
|
|||
|
|
the lid for the vacuum connection. A fitting is hot glued into
|
|||
|
|
the hole and a hose is attached to the vacuum pump. The cap is
|
|||
|
|
pumped down, then the hose is clamped off and disconnected with-
|
|||
|
|
out allowing air back into the cap. Submerge the hose in a bucket
|
|||
|
|
of clean mineral oil and release the clamp. This allows the oil
|
|||
|
|
to backfill the capacitor, and displaces the air that was
|
|||
|
|
removed. Once backfilled to normal pressure, I pump them down a
|
|||
|
|
second time, and repeat the procedure to make sure that all
|
|||
|
|
trapped air between the plates is removed. Air bubbles will form
|
|||
|
|
corona hot spots that will cause dielectric failure.
|
|||
|
|
|
|||
|
|
The vertical stacked plate capacitor is much like the cap I just
|
|||
|
|
covered. But the vertical cap does not require pumpdown. A tank
|
|||
|
|
is used to hold the veritcally stacked plates and dielectrics.
|
|||
|
|
The unit I examined was built in a glass fishtank that employed
|
|||
|
|
no metal in construction. Foam padding was layed in the bottom of
|
|||
|
|
the tank, and wedged in around the sides of the vertical
|
|||
|
|
capacitor stack to cushion it and wedge it in place. The foam
|
|||
|
|
padding also reduced the mineral oil required to cover the stack.
|
|||
|
|
The reason these caps do not require pumpdown is that eventually
|
|||
|
|
the oil will displace the air trapped in the unit. A break in
|
|||
|
|
period of low voltage operation assists the removal of trapped
|
|||
|
|
air, as the pulsing of the cap vibrates the plates and agitates
|
|||
|
|
the air bubbles. The disadvantage of the unit I examined was the
|
|||
|
|
glass fishtank. I have seen plastic waste cans that could be cut
|
|||
|
|
down for use as a tank in this construction.
|
|||
|
|
|
|||
|
|
Higher Qs, higher voltage, and additional capacitance in stacked
|
|||
|
|
plate capacitors can be easily obtained. The trick is to use
|
|||
|
|
thinner dielectric.
|
|||
|
|
|
|||
|
|
Now the dielectric strength of polyethylene is given as
|
|||
|
|
1000 volts per mil, but this is not the case in Tesla coils.
|
|||
|
|
The standard breakdown voltages of a dielectric are calculated
|
|||
|
|
using DC voltage. When you run AC across the dielectric, the
|
|||
|
|
breakdown voltage must be divided by two. Then you must figure
|
|||
|
|
that the peak voltage from a AC sine wave is higher than the
|
|||
|
|
rms voltage most people go by. You meter won't see it, but your
|
|||
|
|
dielectric will. Then you have resonate rise in the Tesla tank
|
|||
|
|
circuit. To give you an idea of resonate rise in a tank, think
|
|||
|
|
about the tidal forces that can be created with timed pushes in a
|
|||
|
|
bathtub. It don't take much energy to push water over the side.
|
|||
|
|
The same principal operates in the tank circuit in a coil,
|
|||
|
|
especially with a synchronous gap system. The current pulsing
|
|||
|
|
back and forth from capacitor plate to capacitor plate causes a
|
|||
|
|
voltage rise that appears on the dielectric in the capacitors.
|
|||
|
|
The standard 60 mil poly is supposed to hold up to 60,000 volts
|
|||
|
|
per the book. I have blown holes through 60 mil poly with a 12 kv
|
|||
|
|
neon sign xfrmr in a Tesla tank circuit and my gap wide open. My
|
|||
|
|
pinky finger fit inside the hole.
|
|||
|
|
|
|||
|
|
One of the neatest homemade stack plate caps I have seen was
|
|||
|
|
built by Bill Richards of T.C.B.O.R., the cost was pretty low,
|
|||
|
|
the materials came from his laundry room, the grocery store, and
|
|||
|
|
the drugstore. The only thing required was 56 hours of time in
|
|||
|
|
arranging the plates according to Bill. But he did end up with
|
|||
|
|
.03 uf 15 kv pulse capacitor in a five gallon bucket. It was
|
|||
|
|
quite a performer on his coil at 3600 watts!
|
|||
|
|
|
|||
|
|
He shopped around for one gallon ziplock freezer bags with a 3
|
|||
|
|
mil thickness. With a sharp scissors he cut the ziplocks off of
|
|||
|
|
the tops of the bags. Then he cut aluminum foil squares that fit
|
|||
|
|
inside the bag leaving a 1/2" of space around all four sides of
|
|||
|
|
the plate. So the plate had dielectric borders 1/2" on all sides.
|
|||
|
|
|
|||
|
|
When two bags were stacked on top of one another, there were two
|
|||
|
|
layers of dielectric, for a total of 6 mils. Being practical,
|
|||
|
|
Bill figured correctly that the stacked bags would hold up to at
|
|||
|
|
least 1000 volts rms input in the Tesla tank. He built up stacks
|
|||
|
|
that had a value of about .45 uf each, with each stack rated at
|
|||
|
|
1000 volts. Then he wired stacks in series.
|
|||
|
|
|
|||
|
|
By squeezing fifteen stacks vertically into a bucket, and
|
|||
|
|
covering the whole thing in about three gallons of mineral oil,
|
|||
|
|
he got the required capacitance at the required voltage. Since
|
|||
|
|
the electrical forces are so well distributed among hundreds of
|
|||
|
|
dielectrics, he had plenty of breakdown safety margin. He gave
|
|||
|
|
the unit a couple of days to rest after construction, topping it
|
|||
|
|
up with oil as required, and gave her the works at 15 kv on a big
|
|||
|
|
coil. The heavy buss wiring never even got warm, and even though
|
|||
|
|
it bubbled out enough air to displace a few more pints of oil, it
|
|||
|
|
did not break down.
|
|||
|
|
|
|||
|
|
It turns out that this is a homemade version of commercial pulse
|
|||
|
|
discharging capacitors. Stacked capacitor sections of very high
|
|||
|
|
value are placed in series until the proper voltage requirement
|
|||
|
|
is met. The cap has a very high Q because all of the plates are
|
|||
|
|
very close together, with a minimum of connections and bussing
|
|||
|
|
required. They deliver a very sharp pulse discharge.
|
|||
|
|
|
|||
|
|
Bill's cap was pretty cramped in the bucket. Because of the
|
|||
|
|
square shape of the bags, a rectangular tank would have made
|
|||
|
|
things easier to fit and wire. But he ran his buss bars through
|
|||
|
|
the side of the bucket (sealed with hot glue) and by snapping on
|
|||
|
|
the lid, he could pick it up by the handle and move it around
|
|||
|
|
with ease.
|
|||
|
|
|
|||
|
|
The novice coiler should think about the capacitor requirements
|
|||
|
|
and experiment some before beginning large scale homemade caps.
|
|||
|
|
Shop for materials; frequently a wholesaler can be found where
|
|||
|
|
bulk products (like mineral oil in 5 gallon pails) can be
|
|||
|
|
purchased for a fraction of the retail cost. But just because
|
|||
|
|
you don't have some big bang pulse caps on line does not mean
|
|||
|
|
that you should wait to begin firing a small coil. Nearly every
|
|||
|
|
beginner gets hir feet wet in salt water capacitors.
|
|||
|
|
|
|||
|
|
Tesla used salt water tanks in Colorado Springs. A tribute to the
|
|||
|
|
genius of the man was his ability to develop his huge peak
|
|||
|
|
powers using low Q saltwater/glass caps. I do not recommend glass
|
|||
|
|
as a dielectric for coiling work. The dielectric constant is much
|
|||
|
|
better than plastic, but the RF dissipation factor is so great
|
|||
|
|
that they can rupture from dielectric heating (even in salt water
|
|||
|
|
the trapped water under the bottles does not circulate) and they
|
|||
|
|
always give a spindly, violet colored spark. Polyethylene again
|
|||
|
|
is the material of choice, and bottles and buckets can be
|
|||
|
|
assembled in a couple of hours that will fire small stuff. I
|
|||
|
|
mentioned he before that I have a friend who is firing 5 kVA
|
|||
|
|
coils, and still using banks of salt water caps to keep his
|
|||
|
|
investment down. As with any homemade capacitor, the salt water
|
|||
|
|
must be covered in oil to suppress surface corona. But the
|
|||
|
|
quality of oil need not be high, and the capacitors need not be
|
|||
|
|
exceptionally clean. A saturated solution of rock salt is all
|
|||
|
|
that is needed for the plates.
|
|||
|
|
|
|||
|
|
I think I have accomplished what I intended to say on this
|
|||
|
|
subject. As always, I am happy to respond on any unclear areas,
|
|||
|
|
the need for additional information, or to note corrections.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 864 Date: 11-16-93 20:41
|
|||
|
|
From: Mark Lawton
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>I have about $5000.00 worth of Tesla equip. ($15,000 replacement
|
|||
|
|
RQ>cost), about $5000.00 worth of chemistry equip, not to mention
|
|||
|
|
RQ>boxes of homemade pyrotechinics equipment (ball mill, star
|
|||
|
|
RQ>presses, rocket ramming table, drying racks, rolls of paper and
|
|||
|
|
RQ>tubing, mixing containers, sieves, etc.) I also buy, sell, and
|
|||
|
|
RQ>build/rebuild/repair Vespa scooters; own three now, plus parts of
|
|||
|
|
RQ>a forth, plus a workbench of special tools for engines, frames,
|
|||
|
|
RQ>wheels, etc.
|
|||
|
|
|
|||
|
|
Sounds just like my stuff! Change the Vespas to dirt bikes and
|
|||
|
|
you've got it. I haven't built a coil in a few years, but I'd
|
|||
|
|
like to send you a blank VHS to get a copy of your work. Write
|
|||
|
|
me back with detailson where to send the tape and the dough.
|
|||
|
|
|
|||
|
|
ML, San Diego Fireworks Pyro
|
|||
|
|
|
|||
|
|
WinQwk 1.30 #279
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- WM v3.10/92-0250
|
|||
|
|
! Origin: Dragnet BBS Oceanside,CA. 619-940-1985 (1:202/401)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 973 Date: 11-17-93 23:52
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>never stare at an operating spark gap without welding goggles.
|
|||
|
|
>To examine the arc on large coils, a sun observation filter
|
|||
|
|
>on a small telescope will tell you if your gaps are quenching.
|
|||
|
|
|
|||
|
|
|
|||
|
|
RQ>... And if all else fails... Put another megavolt through it
|
|||
|
|
>___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
I got your whole post on Spark Gaps - Once again - Thanks!
|
|||
|
|
|
|||
|
|
I had an experience with hard UV light - purchased a small Lincoln Wire
|
|||
|
|
Welder and proceeded to ignore the instructions about covering all parts
|
|||
|
|
of the body - I was thinking about metal splatters but I never thought
|
|||
|
|
about the UV light - wearing sandals at the time and got a bad sunburn
|
|||
|
|
on my feet...
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
Status report:
|
|||
|
|
|
|||
|
|
Got the wire for the secondary as well as the basic design.
|
|||
|
|
|
|||
|
|
I got the 50' of AL flashing for the capacitor as well as all of the PVC
|
|||
|
|
pipe and already had the nuts and bolts...
|
|||
|
|
|
|||
|
|
Also, found a *wonderful* three terminal plus ground RF filter for
|
|||
|
|
240 volt @ 60 Hz rated at 60 amps! $20 - couldn't resist! I will be
|
|||
|
|
able to keep the rest of the electronics in my house ( as well as the
|
|||
|
|
neighbors houses ) somewhat happy :)
|
|||
|
|
|
|||
|
|
Still looking for a source of the form for the secondary - will be
|
|||
|
|
checking prices at local plastics stores when I go to get the
|
|||
|
|
60 mil. Polyethylene sheet - if not, I will use thin-wall PVC but the
|
|||
|
|
stuff I saw at a local Home Depot was poorly out of round...
|
|||
|
|
Maybe some plexiglass disks glued inside to maintain shape.
|
|||
|
|
|
|||
|
|
The local Boeing Aircraft Co. has an interesting "surplus" store
|
|||
|
|
that is a little toooo well known but might have something there.
|
|||
|
|
|
|||
|
|
Have a bunch of 3/8" refrigeration tubing that I can use for the
|
|||
|
|
primary - also into home brewing and this stuff comes in handy...
|
|||
|
|
|
|||
|
|
Still need to get the step-up transformer - already have a 12kV 30mA
|
|||
|
|
neon but the "potential" transformers you mentioned that were used in
|
|||
|
|
power substations sound very good too - will check locally.
|
|||
|
|
|
|||
|
|
Pole pig will probably be somewhat later although the demonstration you
|
|||
|
|
did on your video - using it - were pretty impressive - the simple
|
|||
|
|
Jacobs Ladder was way beyond what a 15kV neon can do - had a really nice
|
|||
|
|
sound to it!
|
|||
|
|
|
|||
|
|
|
|||
|
|
Anyway - work progresses - I will be busy during this "holiday" season,
|
|||
|
|
also the people that were interested in working with me are still very
|
|||
|
|
very much interested - showed the primary person your video and their
|
|||
|
|
jaw dropped <grin>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
p.s. - an idea for the gap - you could have a rotary system that also
|
|||
|
|
had a valving plate ( circular plate with holes drilled into it ) where
|
|||
|
|
the output of the valves could be forced over the spark gaps - pulsed
|
|||
|
|
air quenching of a rotary gap - I have a small metal lathe and
|
|||
|
|
this might be something to do...
|
|||
|
|
|
|||
|
|
|
|||
|
|
As always - Dave
|
|||
|
|
b QMPro 1.51 b Klein Bottle for sale - enquire within...
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- WM v3.10/92-0434
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 3090 Date: 11-18-93 00:19
|
|||
|
|
From: Brian Carling
|
|||
|
|
To: All
|
|||
|
|
Subj: Mega-list parts & kit 1/
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Names and addresses of companies that supply parts and kits for
|
|||
|
|
amateur radio construction: (Updated 17 November, 1993)
|
|||
|
|
|
|||
|
|
Here it is folks, the incredible new MEGA-LIST!
|
|||
|
|
|
|||
|
|
"624 Kits" No phone listed
|
|||
|
|
171 Springlake Drive
|
|||
|
|
Spartanburg, SC 29302 (QRP kits & accessories)
|
|||
|
|
|
|||
|
|
|
|||
|
|
A & A Engineering (714) 952-2114
|
|||
|
|
2521 W. La Palma #K
|
|||
|
|
Anaheim, CA 92801 Battery charger kits etc.
|
|||
|
|
|
|||
|
|
|
|||
|
|
Active Electronics (800) 677-8899 FAX: (514) 697-8112
|
|||
|
|
11 Cummings Park (INT.) (514) 630-7410
|
|||
|
|
Woburn, MA 01801 New electronic parts
|
|||
|
|
|
|||
|
|
ADI Co. (800) 233-6261
|
|||
|
|
180 Michael Drive
|
|||
|
|
Syosset, NY 11791 Power supplies, batteries etc.
|
|||
|
|
|
|||
|
|
|
|||
|
|
Advanced Computer Products Inc. (800) FONE-ACP FAX: (714)
|
|||
|
|
558-8849
|
|||
|
|
1310 E. Edinger (714) 558-8813 Voice Sales
|
|||
|
|
Santa Ana, CA 92705 Chips, semiconductors
|
|||
|
|
|
|||
|
|
|
|||
|
|
All Electronics (800) 826-5432 (orders) FAX: (818)
|
|||
|
|
781-2653
|
|||
|
|
P.O. Box 567 Voice: (818) 904-0524 INFO
|
|||
|
|
Van Nuys, CA 91408 Misc. surplus parts etc. catalog
|
|||
|
|
|
|||
|
|
|
|||
|
|
Alltronics (408) 943-9773
|
|||
|
|
2300 Zanker Road
|
|||
|
|
San Jose, CA 95131 Components, grab bags etc. Min $15
|
|||
|
|
|
|||
|
|
|
|||
|
|
American Science and Surplus (formerly JerryCo)
|
|||
|
|
P.O. Box 48838
|
|||
|
|
Niles IL 60714-0838 ### New address.
|
|||
|
|
+1-708-475-8440
|
|||
|
|
+1-708-864-1589 FAX
|
|||
|
|
Surplus. *The* surplus place. Lots and lots of surplus. WWII
|
|||
|
|
gun cameras, velcro, laser disk chassis, 6 volt VW wipers motors,
|
|||
|
|
LEDs, rubber brains, you name it, they've had it. Catalogs are a
|
|||
|
|
really good time. $12.50 minimum order (which includes the $4 shipping
|
|||
|
|
charge).
|
|||
|
|
|
|||
|
|
Amidon Associates (213) 763-5770
|
|||
|
|
12033 Otsego Street
|
|||
|
|
North Hollywood, CA 91607 (toroid cores, ferrite beads etc.)
|
|||
|
|
|
|||
|
|
|
|||
|
|
Antennas West (800) 926-7373
|
|||
|
|
Box 50062S
|
|||
|
|
Provo, UT 84605 Wide variety of antenna kits, loops etc.
|
|||
|
|
|
|||
|
|
|
|||
|
|
Antique Audio (512) 467-0304
|
|||
|
|
5555 N. Lamar, Bldg. H-105
|
|||
|
|
Austin, TX 78751 Tubes, parts, books, kits
|
|||
|
|
|
|||
|
|
|
|||
|
|
Antique Electronic Supply Co. (602) 820-5411
|
|||
|
|
6221 S. Maple Avenue
|
|||
|
|
Tempe, AZ 85283 (Tubes & other components)
|
|||
|
|
|
|||
|
|
|
|||
|
|
Antique Radio Classified (508) 371-0512 Write for free
|
|||
|
|
sample.
|
|||
|
|
P.O. Box 802 Magazine. You'll find almost ANYTHING here
|
|||
|
|
Carlisle, MA 01741 for older radios, obscure parts,
|
|||
|
|
tubes etc.
|
|||
|
|
|
|||
|
|
|
|||
|
|
Appleseed Electronics Inc. (219) 489-9802
|
|||
|
|
P.O. Box 8228
|
|||
|
|
Fort Wayne, IN 46898 Parts
|
|||
|
|
|
|||
|
|
|
|||
|
|
ARE Communications Ltd. 44-081-997-4476
|
|||
|
|
6 Royal Parade
|
|||
|
|
Hanger Lane, Ealing HF kit for ICOM R-7100 to 200 kHz !
|
|||
|
|
London W5A 1ET & SSB kits for Icom R-100 and R1.
|
|||
|
|
|
|||
|
|
|
|||
|
|
Arrow Electronics Inc. (800) 93-ARROW
|
|||
|
|
1860 Smithtown Avenue Catalogs C/O 25 Hub Drive
|
|||
|
|
Ronkonkoma, NY 11779 Melville, NY 11747
|
|||
|
|
Minimum $25.00 Components distributor.
|
|||
|
|
|
|||
|
|
|
|||
|
|
ARRL
|
|||
|
|
225 Main Stret
|
|||
|
|
Newington, CT 06111 (QRP Books, QST Magazine etc.)
|
|||
|
|
|
|||
|
|
|
|||
|
|
BCD Electro (214) 343-1770
|
|||
|
|
P.O. Box 830119
|
|||
|
|
Richardson, TX 75083 Catalog, parts, etc.
|
|||
|
|
|
|||
|
|
|
|||
|
|
Bigelow Electronics No number listed
|
|||
|
|
P.O. Box 125
|
|||
|
|
Bluffton, OH 45817 Parts, Catalog $2. Flyer 1 stamp
|
|||
|
|
|
|||
|
|
|
|||
|
|
Brigar Electronics (607) 723-3111 FAX: (607) 723-5202
|
|||
|
|
7-9 Alice Street
|
|||
|
|
Binghampton, NY 13904 Parts, gadgets $30 min.
|
|||
|
|
|
|||
|
|
|
|||
|
|
C & N Electronics (800) 421-9397 / (612) 429-9397
|
|||
|
|
6104 Egg Lake Road FAX # (612) 429-0292
|
|||
|
|
Hugo, MN 55038 Buy & sell tubes
|
|||
|
|
|
|||
|
|
|
|||
|
|
C & S Electronics (203) 866-3208
|
|||
|
|
P.O. Box 2142
|
|||
|
|
Norwalk, CT 06852-2142 Specialty RF chips etc.
|
|||
|
|
|
|||
|
|
|
|||
|
|
CeCo Communications (212) 646-6300
|
|||
|
|
2115 Avenue X
|
|||
|
|
Brooklyn, NY 11235 (Vacuum tubes)
|
|||
|
|
|
|||
|
|
|
|||
|
|
Circuit Board Specialists June 1993 Mailed returned, no forwarding
|
|||
|
|
address
|
|||
|
|
P.O. Box 969
|
|||
|
|
Pueblo, CO 81002 (Various kits & projects, P.C. boards)
|
|||
|
|
|
|||
|
|
|
|||
|
|
Circuit Specialists Inc. (800) 528-1417
|
|||
|
|
Box 3047
|
|||
|
|
Scottsdale, AZ 85271 Electronic components incl. RF
|
|||
|
|
parts
|
|||
|
|
|
|||
|
|
|
|||
|
|
Circuitwerkes Co. (904) 331-5999
|
|||
|
|
No address FAX: (904) 331-6999
|
|||
|
|
DTMF decoders etc.
|
|||
|
|
|
|||
|
|
|
|||
|
|
>>> Continued to next message
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
>> Message length exceeded, split by WILDMAIL! v3.01
|
|||
|
|
<<
|
|||
|
|
>> Continued in next message <<
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 3005 Date: 11-18-93 11:45
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Mark Lawton
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
ML> Sounds just like my stuff! Change the Vespas to dirt bikes
|
|||
|
|
ML> and you've got it. I haven't built a coil in a few years,
|
|||
|
|
ML> but I'd like to send you a blank VHS to get a copy of your
|
|||
|
|
ML> work. Write me back with details on where to send the tape
|
|||
|
|
ML> and the dough.
|
|||
|
|
|
|||
|
|
Richard T. Quick II
|
|||
|
|
10028 Manchester Rd.
|
|||
|
|
Suite 253
|
|||
|
|
Glendale, MO 63122
|
|||
|
|
|
|||
|
|
Send a two hour blank VHS high quality tape. $10.00 and a self
|
|||
|
|
addressed postage pre-paid mailer. The tape will be return mailed
|
|||
|
|
the morning after I get your package. I have sent out three in
|
|||
|
|
the last three weeks, so don't worry about me getting rich off
|
|||
|
|
this.
|
|||
|
|
|
|||
|
|
BTW I will trade video even, tape for tape, for coil, rail gun,
|
|||
|
|
high powered laser, and other high voltage stuff. My tapes are
|
|||
|
|
one off masters, recorded on SP for highest quality, and a full
|
|||
|
|
two hours long.
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 867 Date: 11-18-93 15:06
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Joseph Worthington
|
|||
|
|
Subj: 10kva Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
JW> The thread on the Tesla project is very interesting!
|
|||
|
|
JW> If you are the moderator, please let it go on for a while.
|
|||
|
|
JW> Joseph
|
|||
|
|
|
|||
|
|
Now don't you worry about my friend Guy attempting to snuff my
|
|||
|
|
feed. The votes are 100% in my favor, request for the video keep
|
|||
|
|
comming in, and even Guy enjoys reading about and thinking up
|
|||
|
|
sarcasitc comments (probably jealous with too much time on his
|
|||
|
|
hands). Guy gets a little upitty by nature, but he doesn't mean
|
|||
|
|
any harm, and if you don't let him get under your skin he can be
|
|||
|
|
quite funny at times.
|
|||
|
|
|
|||
|
|
And if he does get under your skin, he can take it as well as
|
|||
|
|
dish it out. I kind of (almost) look forward to his replies.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 3004 Date: 11-18-93 15:22
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Primary coils
|
|||
|
|
|
|||
|
|
In order to move towards a complete presentation we need to talk
|
|||
|
|
primary coils. This will take me one step closer to coverage of
|
|||
|
|
of the major componets in the basic 1/4 wave oscillator.
|
|||
|
|
|
|||
|
|
The primary coil is a low resistance, heavy coil, through which
|
|||
|
|
the currents produced by the pulse capacitance travel. In
|
|||
|
|
discussing primaries we need to cover the "skin effect". Both
|
|||
|
|
high voltage and high frequency currents exhibit a property
|
|||
|
|
called skin effect. Skin effect describes a situation where the
|
|||
|
|
current does not penetrate the conductor, but instead flows on
|
|||
|
|
the surface of the conductor. This effect is very pronounced in
|
|||
|
|
Tesla tank circuits where both high voltage and high frequency
|
|||
|
|
are componets of the capacitor pulse.
|
|||
|
|
|
|||
|
|
Studies of the Tesla tank circuit current show that the RF
|
|||
|
|
current ringing through the tank has very little penetration of
|
|||
|
|
the tank circuit conductors. This should be reflected in the
|
|||
|
|
choice of the conductors used to wire the tank circuit, and to
|
|||
|
|
wind the primary coil.
|
|||
|
|
|
|||
|
|
I have had very good luck with conductors that offer a lot of
|
|||
|
|
surface area, as opposed to a large solid cross section. The
|
|||
|
|
preferred material for winding primary coils is thin wall soft
|
|||
|
|
copper water pipe or refrigerator tubing, wide sheet copper
|
|||
|
|
strap, or heavy braided copper ground strap. These matrials offer
|
|||
|
|
a low RF impedance, high Q, and large radiating surface areas.
|
|||
|
|
|
|||
|
|
For wiring the Tesla tank circuit, such areas as buss connectors
|
|||
|
|
to capacitors, tap leads, and spak gap connectors, any of the
|
|||
|
|
materials above may be used, but I prefer heavy DC transmission
|
|||
|
|
wire. The DC transmission wire (like battery cable or welding
|
|||
|
|
cable) offers flexibility and a high grade insulation which helps
|
|||
|
|
prevent breakdown. The cables and connections should be carefully
|
|||
|
|
examined for areas where Q can be gained. Sharp edges or points
|
|||
|
|
should be removed to prevent corona losses, connections should be
|
|||
|
|
tight to reduce impedance, and sharp turns should be eliminated
|
|||
|
|
to reduce "off axis" inductance. The tank circuit wiring should
|
|||
|
|
be as short and straight as possible.
|
|||
|
|
|
|||
|
|
The primary coil itself should be wound on a high Q insulator.
|
|||
|
|
For a coil form or coil supports, high density poly, plexiglas,
|
|||
|
|
lexan, acrylic, or other high Q hard plastic is ideal. The
|
|||
|
|
primary coil should be large. I have seen lots of holdovers from
|
|||
|
|
the classic age of coil building who insist on 2-3 turn primaries
|
|||
|
|
and HUGE capacitors to achieve the proper frequency of operation
|
|||
|
|
in the tank circuit.
|
|||
|
|
|
|||
|
|
This is wrong.
|
|||
|
|
|
|||
|
|
A tank circuit with a small capacitor, and a large primary
|
|||
|
|
inductance, will reach down to the same frequencies of operation.
|
|||
|
|
A tank circuit of this design will use less power, and therefore
|
|||
|
|
require a smaller step up xfrmr. The capacitor will be smaller,
|
|||
|
|
which further reduces the cost of the system.
|
|||
|
|
|
|||
|
|
A large primary coil offers a much greater surface area for
|
|||
|
|
radiation and distributed energy transfer to the secondary. It
|
|||
|
|
couples better with a properly designed secondary. Due to these
|
|||
|
|
design advantages, an equal or greater amount of power is
|
|||
|
|
actually delivered to the secondary, despite the much smaller
|
|||
|
|
capacitance and input power. Using a large primary will allow you
|
|||
|
|
to reduce the value of your capacitor and your input power by 50%
|
|||
|
|
or more (frequently much more) without a reduction in output.
|
|||
|
|
|
|||
|
|
Primaries designed to be operated with 9-15 turns will obtain
|
|||
|
|
power processing energies that are at least 50% greater than 2-3
|
|||
|
|
turn primaries, provided that the secondaries are constructed to
|
|||
|
|
take advantage of the design. Secondary coils with the aspect
|
|||
|
|
ratios and numbers of turns that I have recommended here before,
|
|||
|
|
work best with large primaries tapped at 9-15 turns.
|
|||
|
|
|
|||
|
|
So to give some advice to my friend Dave Halliday, who is
|
|||
|
|
building a 6" secondary coil sometime in the near future,
|
|||
|
|
plan on winding a primary coil from a conductor material that I
|
|||
|
|
have listed above, and use a conductor length of around 75 feet.
|
|||
|
|
Your primary should end up about as wide as, or wider, than your
|
|||
|
|
secondary is tall.
|
|||
|
|
|
|||
|
|
This way the secondary will nest in the large primary. The field
|
|||
|
|
flux from the primary will couple the entire length of the
|
|||
|
|
secondary winding for a distributed, high efficiency, energy
|
|||
|
|
transfer. More energy can be forced into the secondary, with
|
|||
|
|
lower input power, and reduced chance of breakdown and loss.
|
|||
|
|
|
|||
|
|
Primary coils take several forms depending on the type secondary
|
|||
|
|
used with them. Modern secondaries, with high inductance and low
|
|||
|
|
aspect ratios, need primaries that are flat pancakes, or "saucer"
|
|||
|
|
(rising upwards as the turns move out) shaped spirals. Because
|
|||
|
|
this design is so efficient in energy transfers, critical
|
|||
|
|
coupling coefficients are achieved without using the old fashion
|
|||
|
|
vertical helix type primary coil.
|
|||
|
|
|
|||
|
|
When designing primary coils, it is generally a good idea to test
|
|||
|
|
a particular coil shape before committing to a time consuming and
|
|||
|
|
expensive permanent coil. This is especially true for those who
|
|||
|
|
have not had much experience with primary coils of different
|
|||
|
|
shapes and sizes. Some cheap low Q wire can be picked up and used
|
|||
|
|
to make a temporary primary coil for testing. I set the secondary
|
|||
|
|
up on an insulated platform equipped with a good ground, then
|
|||
|
|
wind the test primary. To achieve the desired shape I use tire
|
|||
|
|
tubes (to build up "saucers") plastic wedges, tape, etc.
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 869 Date: 11-18-93 21:18
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Tiefenbrunn
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
Dave!
|
|||
|
|
|
|||
|
|
Got your tape out this morning. Let me know that you got it and
|
|||
|
|
what you think of the spark. I was checking the tape for a minute
|
|||
|
|
as it was recording... Even I forget sometimes how awesome a 10"
|
|||
|
|
secondary looks with a proper discharger and 10 KVA pumped
|
|||
|
|
cleanly through it. I think you will agree, get back with me.
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 19 Nov 93 14:38:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Toroid Discharge Terminals
|
|||
|
|
|
|||
|
|
Another feature of the "classic" Tesla coil design is the sphere
|
|||
|
|
or ball discharge terminal. Tesla clearly was using spheres while
|
|||
|
|
he was developing the Colorado Springs oscillator, but during his
|
|||
|
|
work there he made the discovery of toroids. Photographs of the
|
|||
|
|
Colorado Springs machine clearly shows a brass toroid as part of
|
|||
|
|
the antenna mast to prevent corona leakage and premature breakout
|
|||
|
|
from the top of the extra coil.
|
|||
|
|
|
|||
|
|
As we examine photos of the Wardenclyff machine he built on Long
|
|||
|
|
Island, it is clear that the entire tower was constructed to
|
|||
|
|
carry the giant toroid terminal. I do not have verifiable infor-
|
|||
|
|
mation as to the exact size of this terminal, but it is easily
|
|||
|
|
over 50' in diameter. Probably closer to 75-100'. Toroids perform
|
|||
|
|
several functions as discharge terminals on Tesla coils.
|
|||
|
|
|
|||
|
|
They provide a large top capacitance. This top capacitance helps
|
|||
|
|
"cancel" the high inductance in the secondary coil, and increase
|
|||
|
|
throughput in the system.
|
|||
|
|
|
|||
|
|
They break down at much higher voltages than other shapes. The
|
|||
|
|
donut shaped field distributes the charge density. Higher
|
|||
|
|
voltages must reached before electrical breakdown occurs. To the
|
|||
|
|
coiler this means longer, higher voltage spark. For those of you
|
|||
|
|
that have my video, you can see a 30% increase in spark lenghts
|
|||
|
|
with no change to input power, the only thing I did was add a
|
|||
|
|
larger toroid and retune the system.
|
|||
|
|
|
|||
|
|
Toroids sever the coupling. This may be a controversial statement
|
|||
|
|
on my part. But from what I have seen, appears to be true. A
|
|||
|
|
sphere discharge terminal does not want to separate from the
|
|||
|
|
field flux interactions between the primary and secondary. The
|
|||
|
|
primary field flux wants to couple the sphere discharger into the
|
|||
|
|
system as if it were another turn of the secondary. The spark
|
|||
|
|
from the discharger will frequently follow these lines of force,
|
|||
|
|
and seek to strike back to the primary. The spark discharge bends
|
|||
|
|
back down, and aligns itself with the magnetic lines of force.
|
|||
|
|
|
|||
|
|
While this may be useful if you wish to visualize the size and
|
|||
|
|
shape of the field, it does nothing to increase your spark
|
|||
|
|
lengths. A large toroid on the other hand will establish a field
|
|||
|
|
identity that interacts destructively with the primary/secondary
|
|||
|
|
field interaction. Since this destructive interaction occurs
|
|||
|
|
above the top turns of the secondary is does not affect the coil
|
|||
|
|
performance or ability to process energy. It does however allow
|
|||
|
|
the spark to leave the system unaffected by the primary/secondary
|
|||
|
|
lines of force. This has the effect of allowing a clean getaway
|
|||
|
|
for the discharge and promotes those long strikes to the ground
|
|||
|
|
or other more distant objects.
|
|||
|
|
|
|||
|
|
Toriods also have the beneficial effect of lowering the frequency
|
|||
|
|
of the secondary coil dramatically. By loading a large toriod on
|
|||
|
|
a relatively small coil, a very low secondary frequency is
|
|||
|
|
reached. Low frequency in Tesla systems means long spark. This
|
|||
|
|
way a small coil can give big coil performance. Because of this
|
|||
|
|
ability of the toriod to drop the frequency of the secondary to
|
|||
|
|
such low frequencies, it is important to have a very large
|
|||
|
|
primary available that can be tapped out to over 10-12 turns in
|
|||
|
|
order to regain the system tune. Larger capacitors may be added,
|
|||
|
|
but my experience shows that no additional power or capacitance
|
|||
|
|
is required to get big increases in spark production.
|
|||
|
|
|
|||
|
|
Clearly the toriod is the ultimate in high Q dischargers and
|
|||
|
|
radiators in Tesla systems. Now go out and buy one. I can hear
|
|||
|
|
Dave Halliday now..... "You Paid _HOW MUCH?_"!!!
|
|||
|
|
Yup, spun aluminum toroids are available commercially, and they
|
|||
|
|
run hundreds, even thousands of dollars each. My 20" wide by 5"
|
|||
|
|
high commercial toriod ran me over 350 clams. My ten inch
|
|||
|
|
secondary needs a toroid at least twice as big to achieve optimum
|
|||
|
|
performance, and as commercial toroids get larger, the price
|
|||
|
|
increases exponentially. I priced a 40" toroid for my coil at
|
|||
|
|
$2000.00 not including shipping, and they gave me a six month
|
|||
|
|
deliverly time...
|
|||
|
|
|
|||
|
|
So I built one for $35.00, and it works GREAT! I will never spend
|
|||
|
|
another penny on commercial spun aluminum toroids. Here are the
|
|||
|
|
brief instructions:
|
|||
|
|
|
|||
|
|
I buy the 4" or 6" diam. polyproplyene flexible black plastic
|
|||
|
|
drain piping. This is made out of ridged plastic, so it does not
|
|||
|
|
have a smooth surface, but it easy to bend to form circles of
|
|||
|
|
varying diameters.
|
|||
|
|
|
|||
|
|
I cut the flange off with a sharp knife, match the ends, and tape
|
|||
|
|
them together with wide plastic tape. Once a large ring is
|
|||
|
|
formed, I cover the entire surface with wide plastic tape to
|
|||
|
|
smooth out the ridges in the material. The goal is to have an
|
|||
|
|
even, smooth, surface. The tape choice helps with this con-
|
|||
|
|
struction, Mylar and other tapes have no stretch, and are
|
|||
|
|
difficult to work with as they wrinkle. I shopped several stores
|
|||
|
|
before I found a stretchy material similar to electrical tape.
|
|||
|
|
Tape is applied in overlapping strips, or bands, around the drain
|
|||
|
|
pipe 4" or 6" cross section. Some surface irregularities are OK.
|
|||
|
|
|
|||
|
|
Once the ring is smoothed with a layer of plastic tape, I retape
|
|||
|
|
the entire ring with aluminum plumbers tape. This tape comes in
|
|||
|
|
two standard widths, I bought a large roll of each. Apply strips
|
|||
|
|
of plumbers tape over the prepared surface, make sure the entire
|
|||
|
|
surface is covered, and press out any wrinkles with a fingernail
|
|||
|
|
or tool. You should now have an aluminized ring. Cut out a circle
|
|||
|
|
of thin masonite, wood paneling, or thin plastic so that it will
|
|||
|
|
friction fit in the center of the alumunized ring. Place some
|
|||
|
|
blocks up under this panel, set the ring in place, and tape the
|
|||
|
|
edges all around on both sides with aluminum tape to hold it in
|
|||
|
|
place. Spray adhesive and heavy duty foil are used to cover both
|
|||
|
|
sides if the center plate. Roll out all wrinkles with a socket or
|
|||
|
|
a wood dowel. Works great, about 1/100th the cost.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 3066 Date: 11-19-93 14:38
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Toroid Discharge Terminals
|
|||
|
|
|
|||
|
|
Another feature of the "classic" Tesla coil design is the sphere
|
|||
|
|
or ball discharge terminal. Tesla clearly was using spheres while
|
|||
|
|
he was developing the Colorado Springs oscillator, but during his
|
|||
|
|
work there he made the discovery of toroids. Photographs of the
|
|||
|
|
Colorado Springs machine clearly shows a brass toroid as part of
|
|||
|
|
the antenna mast to prevent corona leakage and premature breakout
|
|||
|
|
from the top of the extra coil.
|
|||
|
|
|
|||
|
|
As we examine photos of the Wardenclyff machine he built on Long
|
|||
|
|
Island, it is clear that the entire tower was constructed to
|
|||
|
|
carry the giant toroid terminal. I do not have verifiable infor-
|
|||
|
|
mation as to the exact size of this terminal, but it is easily
|
|||
|
|
over 50' in diameter. Probably closer to 75-100'. Toroids perform
|
|||
|
|
several functions as discharge terminals on Tesla coils.
|
|||
|
|
|
|||
|
|
They provide a large top capacitance. This top capacitance helps
|
|||
|
|
"cancel" the high inductance in the secondary coil, and increase
|
|||
|
|
throughput in the system.
|
|||
|
|
|
|||
|
|
They break down at much higher voltages than other shapes. The
|
|||
|
|
donut shaped field distributes the charge density. Higher
|
|||
|
|
voltages must reached before electrical breakdown occurs. To the
|
|||
|
|
coiler this means longer, higher voltage spark. For those of you
|
|||
|
|
that have my video, you can see a 30% increase in spark lenghts
|
|||
|
|
with no change to input power, the only thing I did was add a
|
|||
|
|
larger toroid and retune the system.
|
|||
|
|
|
|||
|
|
Toroids sever the coupling. This may be a controversial statement
|
|||
|
|
on my part. But from what I have seen, appears to be true. A
|
|||
|
|
sphere discharge terminal does not want to separate from the
|
|||
|
|
field flux interactions between the primary and secondary. The
|
|||
|
|
primary field flux wants to couple the sphere discharger into the
|
|||
|
|
system as if it were another turn of the secondary. The spark
|
|||
|
|
from the discharger will frequently follow these lines of force,
|
|||
|
|
and seek to strike back to the primary. The spark discharge bends
|
|||
|
|
back down, and aligns itself with the magnetic lines of force.
|
|||
|
|
|
|||
|
|
While this may be useful if you wish to visualize the size and
|
|||
|
|
shape of the field, it does nothing to increase your spark
|
|||
|
|
lengths. A large toroid on the other hand will establish a field
|
|||
|
|
identity that interacts destructively with the primary/secondary
|
|||
|
|
field interaction. Since this destructive interaction occurs
|
|||
|
|
above the top turns of the secondary is does not affect the coil
|
|||
|
|
performance or ability to process energy. It does however allow
|
|||
|
|
the spark to leave the system unaffected by the primary/secondary
|
|||
|
|
lines of force. This has the effect of allowing a clean getaway
|
|||
|
|
for the discharge and promotes those long strikes to the ground
|
|||
|
|
or other more distant objects.
|
|||
|
|
|
|||
|
|
Toriods also have the beneficial effect of lowering the frequency
|
|||
|
|
of the secondary coil dramatically. By loading a large toriod on
|
|||
|
|
a relatively small coil, a very low secondary frequency is
|
|||
|
|
reached. Low frequency in Tesla systems means long spark. This
|
|||
|
|
way a small coil can give big coil performance. Because of this
|
|||
|
|
ability of the toriod to drop the frequency of the secondary to
|
|||
|
|
such low frequencies, it is important to have a very large
|
|||
|
|
primary available that can be tapped out to over 10-12 turns in
|
|||
|
|
order to regain the system tune. Larger capacitors may be added,
|
|||
|
|
but my experience shows that no additional power or capacitance
|
|||
|
|
is required to get big increases in spark production.
|
|||
|
|
|
|||
|
|
Clearly the toriod is the ultimate in high Q dischargers and
|
|||
|
|
radiators in Tesla systems. Now go out and buy one. I can hear
|
|||
|
|
Dave Halliday now..... "You Paid _HOW MUCH?_"!!!
|
|||
|
|
Yup, spun aluminum toroids are available commercially, and they
|
|||
|
|
run hundreds, even thousands of dollars each. My 20" wide by 5"
|
|||
|
|
high commercial toriod ran me over 350 clams. My ten inch
|
|||
|
|
secondary needs a toroid at least twice as big to achieve optimum
|
|||
|
|
performance, and as commercial toroids get larger, the price
|
|||
|
|
increases exponentially. I priced a 40" toroid for my coil at
|
|||
|
|
$2000.00 not including shipping, and they gave me a six month
|
|||
|
|
deliverly time...
|
|||
|
|
|
|||
|
|
So I built one for $35.00, and it works GREAT! I will never spend
|
|||
|
|
another penny on commercial spun aluminum toroids. Here are the
|
|||
|
|
brief instructions:
|
|||
|
|
|
|||
|
|
I buy the 4" or 6" diam. polyproplyene flexible black plastic
|
|||
|
|
drain piping. This is made out of ridged plastic, so it does not
|
|||
|
|
have a smooth surface, but it easy to bend to form circles of
|
|||
|
|
varying diameters.
|
|||
|
|
|
|||
|
|
I cut the flange off with a sharp knife, match the ends, and tape
|
|||
|
|
them together with wide plastic tape. Once a large ring is
|
|||
|
|
formed, I cover the entire surface with wide plastic tape to
|
|||
|
|
smooth out the ridges in the material. The goal is to have an
|
|||
|
|
even, smooth, surface. The tape choice helps with this con-
|
|||
|
|
struction, Mylar and other tapes have no stretch, and are
|
|||
|
|
difficult to work with as they wrinkle. I shopped several stores
|
|||
|
|
before I found a stretchy material similar to electrical tape.
|
|||
|
|
Tape is applied in overlapping strips, or bands, around the drain
|
|||
|
|
pipe 4" or 6" cross section. Some surface irregularities are OK.
|
|||
|
|
|
|||
|
|
Once the ring is smoothed with a layer of plastic tape, I retape
|
|||
|
|
the entire ring with aluminum plumbers tape. This tape comes in
|
|||
|
|
two standard widths, I bought a large roll of each. Apply strips
|
|||
|
|
of plumbers tape over the prepared surface, make sure the entire
|
|||
|
|
surface is covered, and press out any wrinkles with a fingernail
|
|||
|
|
or tool. You should now have an aluminized ring. Cut out a circle
|
|||
|
|
of thin masonite, wood paneling, or thin plastic so that it will
|
|||
|
|
friction fit in the center of the alumunized ring. Place some
|
|||
|
|
blocks up under this panel, set the ring in place, and tape the
|
|||
|
|
edges all around on both sides with aluminum tape to hold it in
|
|||
|
|
place. Spray adhesive and heavy duty foil are used to cover both
|
|||
|
|
sides if the center plate. Roll out all wrinkles with a socket or
|
|||
|
|
a wood dowel. Works great, about 1/100th the cost.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 928 Date: 11-19-93 16:31
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
DH> Geeez Richard - and I thought *I* had too much going on at
|
|||
|
|
DH> once what with my boat, woodworking shop, metal shop (
|
|||
|
|
DH> lathe, wirewelder and torches ), music studio, homebrewing,
|
|||
|
|
DH> BBS, computers and printing...
|
|||
|
|
|
|||
|
|
DH> This takes the cake <grin>
|
|||
|
|
|
|||
|
|
Isn't it funny how intelligence and imagination breeds havoc?
|
|||
|
|
|
|||
|
|
Mark Lawton (spel) sent me a post about all of his concurrent
|
|||
|
|
projects too. It seems we landed in a nice spot to exchange a few
|
|||
|
|
ideas and interests. This conference is not too crowded, yet
|
|||
|
|
several people end up with similar sets of hobbies and interests.
|
|||
|
|
|
|||
|
|
BTW to keep somewhat on topic, I really hope your coiling efforts
|
|||
|
|
are moving along. I have tried to dump as much as possible in the
|
|||
|
|
last few days, and have spent several hours per day in organizing
|
|||
|
|
my thoughts and getting them out.
|
|||
|
|
|
|||
|
|
Between the video tape and the posts you should have sufficient
|
|||
|
|
information to be able to build a really hot coil system or two.
|
|||
|
|
I wish you the best of luck, and if you need any clarification,
|
|||
|
|
further explaination, or any such, drop me a post.
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 929 Date: 11-19-93 16:49
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
>recently gutted. When I inquired, he stated he had to switch to
|
|||
|
|
>an ungrounded, wooden, control cabinet because he was drawing
|
|||
|
|
>sparks to fingers when he touched the controls...
|
|||
|
|
|
|||
|
|
DH> I also recall stories about ham radio shacks having this
|
|||
|
|
DH> problem.
|
|||
|
|
|
|||
|
|
DH> Used to work for the public aquarium in Boston and we had
|
|||
|
|
DH> grounding problems like you wouldn't believe - I was
|
|||
|
|
DH> responsible for all of the non-living exhibits ( PA and AV
|
|||
|
|
DH> stuff ) and the ground at every single outlet was at a
|
|||
|
|
DH> different potential than any other outlet. I once found 50
|
|||
|
|
DH> volts difference between two located 20' apart... A guide
|
|||
|
|
DH> was setting up a temporary exhibit and used both outlets for
|
|||
|
|
DH> their equipment. They got a bit of a rude awakening that
|
|||
|
|
DH> day <grin>
|
|||
|
|
|
|||
|
|
A few months back when our local sysop first added this
|
|||
|
|
conference, there was an thread on grounds and grounding that you
|
|||
|
|
just would not believe (well maybe you would), anyway, the
|
|||
|
|
misunderstandings and misconceptions about grounds and grounding,
|
|||
|
|
and the bizzare things that happen when equipment and systems are
|
|||
|
|
not properly grounded...
|
|||
|
|
|
|||
|
|
I have threatened to write a book on the subject and post it
|
|||
|
|
chapter by chapter!
|
|||
|
|
|
|||
|
|
Tesla was the first person to apply ground to a tuned circuit.
|
|||
|
|
His studies of grounds, and grounding practices was extremely
|
|||
|
|
extensive, but unfortunately little was documented or survived.
|
|||
|
|
|
|||
|
|
By reading the Colorado Springs Notes it is quite clear that
|
|||
|
|
Tesla struggled to get a good ground on site for his system and
|
|||
|
|
cited the local geology (sand & rock) as the source of his
|
|||
|
|
problem. He eventually had to run water 24 hours a day over his
|
|||
|
|
ground.
|
|||
|
|
|
|||
|
|
He used a two ground system in his CS lab, and documents the
|
|||
|
|
resistance, and electrical distance between the two. The system
|
|||
|
|
ground was a 3' square copper plate dropped in the bottom of a
|
|||
|
|
12' hole with a couple of wheelbarrows of coke dumped on top.
|
|||
|
|
The hole was backfilled and watered as I mentioned.
|
|||
|
|
|
|||
|
|
His control, or line frequency, ground was the water pipe. Tesla
|
|||
|
|
was capable of producing serious ground currents from the
|
|||
|
|
machine. Some of the effects were reported many miles away;
|
|||
|
|
sparks comming off the the shoes of horses which caused the
|
|||
|
|
animals to spook, clouds of insects covered in St.Elmos fire,
|
|||
|
|
in addition to the locals getting sparks from their water taps.
|
|||
|
|
|
|||
|
|
When he went on to Wardenclyff, he spent half of the tower
|
|||
|
|
construction cost on the well with 18" copper plated steel pipe
|
|||
|
|
driven into bedrock 50' below the water table. He did not intend
|
|||
|
|
to mess around.
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
111993 1704
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 930 Date: 11-19-93 17:04
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: David Tiefenbrunn
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
DT> I have sent you a video tape. I hope the
|
|||
|
|
DT> offer is still good. I included a few
|
|||
|
|
DT> minutes of the first run of the 45KW generator.
|
|||
|
|
|
|||
|
|
DT> The new lab sounds great.
|
|||
|
|
|
|||
|
|
DT> Of course, you will probably get the tape before
|
|||
|
|
DT> this message. :)
|
|||
|
|
|
|||
|
|
Yeah I did! And you will probably get the tape back before you
|
|||
|
|
get this message. It went out yesterday. Yes the offer is still
|
|||
|
|
good, and so is the tape. You will really enjoy watching it.
|
|||
|
|
|
|||
|
|
New lab so far is looking good. Expensive, contractor wants
|
|||
|
|
$32.50 per square foot.
|
|||
|
|
|
|||
|
|
Read my letter in with the tape about the generator video. I am
|
|||
|
|
still kicking myself (I recorded over it before I read your
|
|||
|
|
letter)
|
|||
|
|
|
|||
|
|
BTW I will trade tapes happily if anyone has goodies I would be
|
|||
|
|
interested in. Video tape is an excellent way to archive our
|
|||
|
|
little projects; not only are they useful as a personal
|
|||
|
|
reference, but they are amazingly effective teaching tools.
|
|||
|
|
Nothing explains something like a coil project as well as the
|
|||
|
|
designer/operator pointing to, and talking about, the operational
|
|||
|
|
working equipment.
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 930 Date: 11-19-93 17:04
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: David Tiefenbrunn
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
DT> I have sent you a video tape. I hope the
|
|||
|
|
DT> offer is still good. I included a few
|
|||
|
|
DT> minutes of the first run of the 45KW generator.
|
|||
|
|
|
|||
|
|
DT> The new lab sounds great.
|
|||
|
|
|
|||
|
|
DT> Of course, you will probably get the tape before
|
|||
|
|
DT> this message. :)
|
|||
|
|
|
|||
|
|
Yeah I did! And you will probably get the tape back before you
|
|||
|
|
get this message. It went out yesterday. Yes the offer is still
|
|||
|
|
good, and so is the tape. You will really enjoy watching it.
|
|||
|
|
|
|||
|
|
New lab so far is looking good. Expensive, contractor wants
|
|||
|
|
$32.50 per square foot.
|
|||
|
|
|
|||
|
|
Read my letter in with the tape about the generator video. I am
|
|||
|
|
still kicking myself (I recorded over it before I read your
|
|||
|
|
letter)
|
|||
|
|
|
|||
|
|
BTW I will trade tapes happily if anyone has goodies I would be
|
|||
|
|
interested in. Video tape is an excellent way to archive our
|
|||
|
|
little projects; not only are they useful as a personal
|
|||
|
|
reference, but they are amazingly effective teaching tools.
|
|||
|
|
Nothing explains something like a coil project as well as the
|
|||
|
|
designer/operator pointing to, and talking about, the operational
|
|||
|
|
working equipment.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 931 Date: 11-20-93 00:42
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
Tesla Coil Builders Association
|
|||
|
|
|
|||
|
|
I posted this address a few months back, but many people dropped
|
|||
|
|
in recently so I will post it back up again. The organization is
|
|||
|
|
called TCBA for short and is run by one, Harry Goldman, retired
|
|||
|
|
high school science teacher. He publishes a quarterly news letter
|
|||
|
|
called _NEWS_
|
|||
|
|
|
|||
|
|
The news letter has articles submitted by members on a regular
|
|||
|
|
basis, new coil designs, sparks gaps (my first submission was
|
|||
|
|
published here), spark photos, articles on "classic" coils
|
|||
|
|
gleened from age old science magazines, questions and answers
|
|||
|
|
sections, as well as a "trading post" buy and sell section for
|
|||
|
|
new and used HV caps, xfrmrs, coils, coil forms, etc., and a list
|
|||
|
|
of the best commercial parts suppliers.
|
|||
|
|
|
|||
|
|
Subscriptions and membership is $24.00 U.S., $30 CAN., and
|
|||
|
|
includes a framable certificate.
|
|||
|
|
|
|||
|
|
Harry has been publishing the NEWS since 1982 and all back issues
|
|||
|
|
are available as well a a comprehensive index of all articles in
|
|||
|
|
those back issues. If you are interested write to:
|
|||
|
|
|
|||
|
|
Harry Goldman
|
|||
|
|
TCBA
|
|||
|
|
3 Amy Lane
|
|||
|
|
Queensbury, NY 12804
|
|||
|
|
Tel: (518) 792-1003
|
|||
|
|
|
|||
|
|
Tell him I sent you!!!
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1339 Date: 11-20-93 18:24
|
|||
|
|
From: Joseph Freivald
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
For those of us who are wanna bees, What's a tesla coil, and why
|
|||
|
|
does it get at least 10 posts per day?
|
|||
|
|
|
|||
|
|
Just trying to catch up,
|
|||
|
|
Joe
|
|||
|
|
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1040 Date: 11-21-93 22:40
|
|||
|
|
From: David Tiefenbrunn
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
On 11-18-93 Richard Quick wrote to Dave Tiefenbrunn...
|
|||
|
|
|
|||
|
|
RQ> Got your tape out this morning. Let me know that you got it and
|
|||
|
|
|
|||
|
|
Tape recieved 11-20-93. As was the post quoted herein.
|
|||
|
|
|
|||
|
|
RQ> what you think of the spark. I was checking the tape for a minute
|
|||
|
|
RQ> as it was recording... Even I forget sometimes how awesome a 10"
|
|||
|
|
RQ> secondary looks with a proper discharger and 10 KVA pumped
|
|||
|
|
RQ> cleanly through it. I think you will agree, get back with me.
|
|||
|
|
|
|||
|
|
*Quite* awsome... Previously the largest Tesla coil
|
|||
|
|
I had seen was in a science museum in Boston, MA.
|
|||
|
|
It's spark was maybe 1/2 of the >small< coil in your
|
|||
|
|
video. I *used* to think it was a big one.
|
|||
|
|
|
|||
|
|
At what power level does it become dangerous to
|
|||
|
|
draw spark with the pole?
|
|||
|
|
|
|||
|
|
The one I built when I was in college (over 10 years
|
|||
|
|
ago) had 230W input, but I didn't have all the details
|
|||
|
|
of how to optimize / tune it. It still threw sparks
|
|||
|
|
a few inches long. It also had a nasty static charge
|
|||
|
|
that would build up while it was running, and while
|
|||
|
|
I drew sparks (with a rod) the static charge would
|
|||
|
|
pop and I'd get a jolt. Your coils never displayed
|
|||
|
|
that particular problem in the video, just nice
|
|||
|
|
clean HV RF. I'm going to show a few friends
|
|||
|
|
your tape. One of them has a small (by your standards)
|
|||
|
|
coil. His coil's primary is wound like a regular coil,
|
|||
|
|
not flat like yours (or for that matter, the others
|
|||
|
|
I've seen. I will have to check with him to find out
|
|||
|
|
why. I think he is useing flat glass / foil caps.
|
|||
|
|
With a little luck & timing maybe I can get video
|
|||
|
|
of it when we do the generator tape deal. (see other
|
|||
|
|
post) I have been saving all of the "how to" stuff for
|
|||
|
|
future reference.
|
|||
|
|
|
|||
|
|
TTYL,
|
|||
|
|
Dave
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
___
|
|||
|
|
* OFFLINE 1.54 * I love the smell of ozone in the morning.
|
|||
|
|
|
|||
|
|
-!- Maximus 2.01wb
|
|||
|
|
! Origin: =Abbey Road BBS= Higganum, Ct. (203)345-7635
|
|||
|
|
(1:320/5967)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1102 Date: 11-21-93 23:01
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> Primary coils
|
|||
|
|
|
|||
|
|
RQ>In order to move towards a complete presentation we need to
|
|||
|
|
>talk primary coils. This will take me one step closer to
|
|||
|
|
>coverage of of the major componets in the basic 1/4 wave
|
|||
|
|
>oscillator.
|
|||
|
|
|
|||
|
|
|
|||
|
|
Once again - THANKS!
|
|||
|
|
|
|||
|
|
Also, just had a bit of a "conceptual" breakthrough - was trying
|
|||
|
|
to see why 1/4 wave was best and then saw that this is 1/4 wave
|
|||
|
|
reflected over a ground plane...
|
|||
|
|
|
|||
|
|
Makes a lot of sense ( arcs too )
|
|||
|
|
|
|||
|
|
Again, this has been saved, will be printed tomorrow.
|
|||
|
|
|
|||
|
|
::Status report::
|
|||
|
|
|
|||
|
|
Got some PVC pipe - flimsy stuff but I will use wooden braces to
|
|||
|
|
hold it circular while I wind it. Actually, will probably cut
|
|||
|
|
out some plexi circles and glue them in... Got a bunch from some
|
|||
|
|
old signs
|
|||
|
|
|
|||
|
|
Still have yet to get to the plastics store to get the material
|
|||
|
|
for the capacitors but looking at this week - also probably
|
|||
|
|
"have" to make a run to one of our distributors located near the
|
|||
|
|
Boeing surplus store - check for teflon wire as well as "exotic"
|
|||
|
|
6" tubes...
|
|||
|
|
|
|||
|
|
Question - there are some very cheap cutting boards available
|
|||
|
|
made out of a high-density polyethylene plastic - was thinking of
|
|||
|
|
using them for the "breadboard" for the transformer protection
|
|||
|
|
stuff as well as the base of the coil - do you have any feedback
|
|||
|
|
on the Q of this material
|
|||
|
|
|
|||
|
|
Thank you for your post on Primary coils - haven't read it
|
|||
|
|
completely but I got the idea that the diameter was critical -
|
|||
|
|
will check and get large tubing if that is true...
|
|||
|
|
|
|||
|
|
Again - TTYL - Dave
|
|||
|
|
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 3181 Date: 11-21-93 23:11
|
|||
|
|
From: David Tiefenbrunn
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 45KVA generator
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Hello, Richard.
|
|||
|
|
|
|||
|
|
I know what you mean about the "wonderful" day. Send me a tape.
|
|||
|
|
I have approximatly 30 minutes of cranking the generator for the
|
|||
|
|
first run. Obviously, being the first attempt, I had no idea
|
|||
|
|
how long or what it would take to get it running. After working
|
|||
|
|
the crankshaft back & forth by "hand", and getting the starters
|
|||
|
|
to turn the thing over, I found it had no compresion. So I took
|
|||
|
|
the head off, and did a valve job. 2 new valves, and 5 springs.
|
|||
|
|
Almost needed seats but there was enough left of them. I will
|
|||
|
|
edit that down to a reasonable length, depending on the length of
|
|||
|
|
the tape you send. I can also do a "tour" of the unit, if you
|
|||
|
|
like.
|
|||
|
|
|
|||
|
|
|
|||
|
|
And, for that matter, some of the other somewhat less than common
|
|||
|
|
stuff / equiptment I have collected or constructed. I have some
|
|||
|
|
shots of the internal parts of the engine, as after getting it
|
|||
|
|
started, I discovered it needed an oil ring on cylinder #1.
|
|||
|
|
I use an S-VHS camcorder, and make dubs to VHS HI-FI. The
|
|||
|
|
sharpness of the picture w/S-VHS is a huge improvement over VHS.
|
|||
|
|
It is very close to laser disc quality, so the dubs come out as
|
|||
|
|
good as an original (not a copy) VHS tape would be.
|
|||
|
|
|
|||
|
|
I will let my sysop know about the double echos, and that I
|
|||
|
|
apparently have been loosing replys. I am beginning to think
|
|||
|
|
about setting up my own BBS, also.
|
|||
|
|
|
|||
|
|
Post a message about what to tape, and or send your blank, and I
|
|||
|
|
will get it back ASAP.
|
|||
|
|
|
|||
|
|
TTYL,
|
|||
|
|
Dave
|
|||
|
|
|
|||
|
|
* OFFLINE 1.54 * I love the smell of ozone in the morning.
|
|||
|
|
|
|||
|
|
Origin: =Abbey Road BBS= Higganum, Ct. (203)345-7635
|
|||
|
|
(1:320/5967)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1008 Date: 11-22-93 03:18
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
DH> Status report:
|
|||
|
|
|
|||
|
|
DH> Got the wire for the secondary as well as the basic design.
|
|||
|
|
|
|||
|
|
OK, I got some soft figures for you. Given the specs of the
|
|||
|
|
planned coil you gave me here's what your looking at:
|
|||
|
|
|
|||
|
|
Bare secondary frequency around ~260 kHz
|
|||
|
|
Secondary top loaded with 18" diam, 4" cross section toriod will
|
|||
|
|
resonate around ~180 kHz
|
|||
|
|
|
|||
|
|
Using the rolled capacitor as per my specs you should get .02 uf
|
|||
|
|
capacitance, so to tune this secondary in on the tank circuit,
|
|||
|
|
your tank will have to be: Saucer shaped sprial wound primary.
|
|||
|
|
Angle of inclination from first turn to last turn will be right
|
|||
|
|
around 30 degrees slope; this should give pretty close to critcal
|
|||
|
|
coupling with this secondary. Diameter of the first turn (inside
|
|||
|
|
diameter) will need to be ~9" giving you 1-1/2" space between the
|
|||
|
|
coils. With the toroid discharge terminal on the secondary coil,
|
|||
|
|
the tank should tune in when the primary is tapped right around 9
|
|||
|
|
turns.
|
|||
|
|
|
|||
|
|
These numbers are going to off a little, but I tuned a guys coil
|
|||
|
|
once over the telephone when he was six states away. I was
|
|||
|
|
throwing stuff off the top of my head and set the coil up in my
|
|||
|
|
mind from his verbal description. He claimed I had the coil in
|
|||
|
|
it's best tune the first time he turned it on, said every time he
|
|||
|
|
altered anything the spark decreased. It COULD have been dumb
|
|||
|
|
luck... But I checked the numbers you gave me against my programs
|
|||
|
|
and my documented systems in this size. You'll need at least 9
|
|||
|
|
turns on a saucer primary to get that coil to fire with that cap.
|
|||
|
|
|
|||
|
|
DH> I got the 50' of AL flashing for the capacitor as well as
|
|||
|
|
DH> all of the PVC pipe and already had the nuts and bolts...
|
|||
|
|
|
|||
|
|
Your looking good here.
|
|||
|
|
|
|||
|
|
DH> Also, found a *wonderful* three terminal plus ground RF
|
|||
|
|
DH> filter for 240 volt @ 60 Hz rated at 60 amps! $20 -
|
|||
|
|
DH> couldn't resist!
|
|||
|
|
|
|||
|
|
I would have picked it up too. This is looking good, be sure to
|
|||
|
|
run the filter backwards. If your using only one filter, place it
|
|||
|
|
between in the supply line before the variac. Ground the case to
|
|||
|
|
your 60 cycle neutral.
|
|||
|
|
|
|||
|
|
DH> Still looking for a source of the form for the secondary -
|
|||
|
|
DH> the stuff I saw at a local Home Depot was poorly out of
|
|||
|
|
DH> round...
|
|||
|
|
DH> Maybe some plexiglass disks glued inside to maintain shape.
|
|||
|
|
|
|||
|
|
I would avoid using baffels inside the coil form, they tend to
|
|||
|
|
reduce the Q of the coil. Find a different supplier for some
|
|||
|
|
rounder pipe before you go this route.
|
|||
|
|
|
|||
|
|
DH> Have a bunch of 3/8" refrigeration tubing that I can use for
|
|||
|
|
DH> the primary -
|
|||
|
|
|
|||
|
|
Just fine for this sized primary coil, make sure it is long
|
|||
|
|
enough, though you can braze in a splice for added length.
|
|||
|
|
|
|||
|
|
DH> Still need to get the step-up transformer - already have a
|
|||
|
|
DH> 12kV 30mA neon but the "potential" transformers you
|
|||
|
|
DH> mentioned that were used in power substations sound very
|
|||
|
|
DH> good too - will check locally.
|
|||
|
|
|
|||
|
|
If you use 12 kv neons you will need about 120 ma total to drive
|
|||
|
|
this coil to good spark. That's four 12,30s.
|
|||
|
|
|
|||
|
|
DH> Pole pig will probably be somewhat later although the
|
|||
|
|
DH> demonstration you did on your video - using it - were
|
|||
|
|
DH> pretty impressive - the simple Jacobs Ladder was way beyond
|
|||
|
|
DH> what a 15kV neon can do - had a really nice sound to it!
|
|||
|
|
|
|||
|
|
I should hope so!!! I run the Jacobs Ladder between 5-7 kVA with
|
|||
|
|
a rail voltage of 20,000 volts.
|
|||
|
|
|
|||
|
|
DH> Anyway - work progresses - I will be busy during this
|
|||
|
|
DH> "holiday" season, also the people that were interested in
|
|||
|
|
DH> working with me are still very very much interested - showed
|
|||
|
|
DH> the primary person your video and their jaw dropped <grin>
|
|||
|
|
|
|||
|
|
His was not the first, and won't be the last!!! You should have
|
|||
|
|
seen the look on MY face while I was running it! I was 20' away
|
|||
|
|
and under cover and the sparks looked like they were going to
|
|||
|
|
wipe my nose for me.
|
|||
|
|
|
|||
|
|
DH> p.s. - an idea for the gap - you could have a rotary system
|
|||
|
|
DH> that also had a valving plate ( circular plate with holes
|
|||
|
|
DH> drilled into it ) where the output of the valves could be
|
|||
|
|
DH> forced over the spark gaps - pulsed air quenching of a
|
|||
|
|
DH> rotary gap - I have a small metal lathe and this might be
|
|||
|
|
DH> something to do...
|
|||
|
|
|
|||
|
|
I think I understand the idea, may be a good one. I can give you
|
|||
|
|
specs for basic systems that will give excellent performance. But
|
|||
|
|
for ideas like this, I encourage people to develop as far as
|
|||
|
|
profitable.
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1034 Date: 11-22-93 18:53
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Tuning The Tesla Tank Circuit
|
|||
|
|
|
|||
|
|
Once a Tesla coil is set up and ready to fire, certain steps
|
|||
|
|
should be taken before power is applied. Don't expect to throw
|
|||
|
|
the works on a newly built or newly re-arranged system. If you do
|
|||
|
|
you may have to go back to the drawing board. The coil must be
|
|||
|
|
brought into tune, and up to power gradually.
|
|||
|
|
|
|||
|
|
The use of a variac autotransformer is highly recommended for
|
|||
|
|
controlling power on a system, even if the coil is eventually to
|
|||
|
|
be used in on/off applications. Never throw full power to a coil
|
|||
|
|
until you are sure the system is in proper tune.
|
|||
|
|
|
|||
|
|
Set the tank circuit up first. Double check all of your
|
|||
|
|
connections. Run your grounds and double check those, never take
|
|||
|
|
a solid connection for granted. Set the secondary into the
|
|||
|
|
primary and ground it. Use a small discharge terminal at first if
|
|||
|
|
available. The smaller terminal will break down and produce spark
|
|||
|
|
at a lower voltage than a larger terminal, and new setups are not
|
|||
|
|
the place to stress the secondary.
|
|||
|
|
|
|||
|
|
CLOSE YOUR SPARK GAPS DOWN! This is the numero uno step in
|
|||
|
|
bringing a coil into tune, don't run a lot of gap. I set up a
|
|||
|
|
static test with the power supply and no capacitors. Close down
|
|||
|
|
the safety gap until it has reached the point where the
|
|||
|
|
transformer will jump the gap 50% of the time when full voltage
|
|||
|
|
is applied in the test. Measure this gap distance and record it.
|
|||
|
|
When tuning a coil you will reduce this safety gap distance by
|
|||
|
|
50% to provide kickback protection. It is a good idea to run a
|
|||
|
|
static test on the main system spark gap and close it down by 75%
|
|||
|
|
But on some gap systems this may not be practical, as series gaps
|
|||
|
|
behave much differently that a single gap. These differences are
|
|||
|
|
caused by the opposing lines of force in the single gap used for
|
|||
|
|
the safety.
|
|||
|
|
|
|||
|
|
Apply a bit of power until the tank circuit fires. If no spark
|
|||
|
|
breakout is seen from the discharge terminal don't worry. Use a
|
|||
|
|
florescent bulb as an indicator. As the coil is closer to tune,
|
|||
|
|
the farther and brighter the bulb will glow. Turn off the coil
|
|||
|
|
and move the tap connection on the primary coil a half turn and
|
|||
|
|
check the bulb brightness, then move it a full turn in the
|
|||
|
|
opposite direction and note the brightness of the bulb again.
|
|||
|
|
This way you can determine the direction the tap needs to be
|
|||
|
|
moved to locate the tune spot.
|
|||
|
|
|
|||
|
|
Open the main and safety gaps up in steps. Apply the same voltage
|
|||
|
|
input (low power) and check for discharge. Once spark has begun
|
|||
|
|
to break out of the discharge terminal use it as a visual
|
|||
|
|
indicator of tune as long as full power is not applied. With full
|
|||
|
|
power into a system the spark frequently gets so wild and
|
|||
|
|
distracting you cannot judge accurately. I have found that
|
|||
|
|
recording the tuning on video, and watching the tape provides a
|
|||
|
|
way to look at the system objectively.
|
|||
|
|
|
|||
|
|
A system in proper tune should not break down the safety gap. The
|
|||
|
|
safety gap set at the full static test setting should not be too
|
|||
|
|
acitive. Once the coil is in good tune the safety gap electrodes
|
|||
|
|
may be opened to the point where the gap only fires perhaps once
|
|||
|
|
every three or four seconds weakly.
|
|||
|
|
|
|||
|
|
Tuning is an art, and it takes a little practice. I recently came
|
|||
|
|
across some information that will be quite helpful for the novice
|
|||
|
|
(and even an expert on high powered systems) obtain better
|
|||
|
|
tuning. Use an arc meter.
|
|||
|
|
|
|||
|
|
The arc meter is made by suspending a series of gaps on
|
|||
|
|
monofiliment fishing line. One end of the arc meter is connected
|
|||
|
|
to the toroid, the other end of the meter is strung across the
|
|||
|
|
room and grounded.
|
|||
|
|
|
|||
|
|
By placing a series of air gaps on an insulated line, the arc
|
|||
|
|
strength and voltage may be accurately gaged with the eye.
|
|||
|
|
Discharge will follow the gap path (it looks like a ray gun
|
|||
|
|
firing) and gaps may be counted as a reference.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1333 Date: 11-23-93 10:28
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> DH> Geeez Richard - and I thought *I* had too much going on
|
|||
|
|
> DH> at once what with my boat, woodworking shop, metal shop (
|
|||
|
|
> DH> lathe, wirewelder and torches ), music studio,
|
|||
|
|
> DH> homebrewing, BBS, computers and printing...
|
|||
|
|
|
|||
|
|
RQ> DH> This takes the cake <grin>
|
|||
|
|
|
|||
|
|
RQ>Isn't it funny how intelligence and imagination breeds havoc?
|
|||
|
|
|
|||
|
|
Havoc... Now *that's* a polite term for it <grin>
|
|||
|
|
|
|||
|
|
|
|||
|
|
RQ>Mark Lawton (spel) sent me a post about all of his concurrent
|
|||
|
|
>projects too. It seems we landed in a nice spot to exchange a
|
|||
|
|
>few ideas and interests. This conference is not too crowded,
|
|||
|
|
>yet several people end up with similar sets of hobbies and
|
|||
|
|
>interests.
|
|||
|
|
|
|||
|
|
Great! I am looking to connect to a local source for FIDO just
|
|||
|
|
for this conference...
|
|||
|
|
|
|||
|
|
RQ>BTW to keep somewhat on topic, I really hope your coiling
|
|||
|
|
>efforts are moving along. I have tried to dump as much as
|
|||
|
|
>possible in the last few days, and have spent several hours
|
|||
|
|
>per day in organizing my thoughts and getting them out.
|
|||
|
|
|
|||
|
|
I sent you a status report a couple days ago - just getting stuff
|
|||
|
|
together right now. I will be going to the Boeing surplus place
|
|||
|
|
today and will see if they have anything of interest - they are
|
|||
|
|
closed on Monday - they put all the new stuff out then so Tuesday
|
|||
|
|
is the primo day to go there...
|
|||
|
|
|
|||
|
|
TTYL - Dave <20>:-)
|
|||
|
|
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1334 Date: 11-23-93 10:36
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> DH> Used to work for the public aquarium in Boston and we had
|
|||
|
|
> DH> grounding problems like you wouldn't believe - I was
|
|||
|
|
|
|||
|
|
RQ>A few months back when our local sysop first added this
|
|||
|
|
>conference, there was an thread on grounds and grounding that
|
|||
|
|
>you just would not believe (well maybe you would), anyway, the
|
|||
|
|
>misunderstandings and misconceptions about grounds and
|
|||
|
|
>grounding, and the bizzare things that happen when equipment
|
|||
|
|
>and systems are not properly grounded...
|
|||
|
|
|
|||
|
|
I can well imagine - I also did PA systems for bands for a while
|
|||
|
|
and some of the perceptions about power and signal grounds were
|
|||
|
|
amazing.
|
|||
|
|
|
|||
|
|
Not so much for their blind ignorance and lack of common sense
|
|||
|
|
but for the fact that some of them were still alive <grin>
|
|||
|
|
|
|||
|
|
RQ>By reading the Colorado Springs Notes it is quite clear that
|
|||
|
|
>Tesla struggled to get a good ground on site for his system
|
|||
|
|
>and cited the local geology (sand & rock) as the source of his
|
|||
|
|
>problem. He eventually had to run water 24 hours a day over
|
|||
|
|
>his ground.
|
|||
|
|
|
|||
|
|
Interesting - the water table there is probably pretty low so
|
|||
|
|
that would be a problem. In Seattle, the reverse is true - where
|
|||
|
|
I live is fairly close to Lake Washington and the ground is
|
|||
|
|
pretty wet all year round.
|
|||
|
|
|
|||
|
|
I will probably drive a couple lengths of coper pipe into the
|
|||
|
|
earth for the coil ground - the ground for the house is a 6'
|
|||
|
|
copper rod but from what you say, the more the merrier!
|
|||
|
|
|
|||
|
|
|
|||
|
|
RQ>His control, or line frequency, ground was the water pipe.
|
|||
|
|
>Teslawas capable of producing serious ground currents from the
|
|||
|
|
>machine. Some of the effects were reported many miles away;
|
|||
|
|
>sparks comming off the the shoes of horses which caused the
|
|||
|
|
>animals to spook, clouds of insects covered in St.Elmos fire,
|
|||
|
|
>in addition to the locals getting sparks from their water
|
|||
|
|
>taps.
|
|||
|
|
|
|||
|
|
Must have been fun to live near there <grin>
|
|||
|
|
|
|||
|
|
RQ>When he went on to Wardenclyff, he spent half of the tower
|
|||
|
|
>construction cost on the well with 18" copper plated steel
|
|||
|
|
>pipe driven into bedrock 50' below the water table. He did not
|
|||
|
|
>intend to mess around.
|
|||
|
|
|
|||
|
|
Jeeezzz! I guess not!!! That is getting a bit serious!
|
|||
|
|
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1335 Date: 11-23-93 10:38
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> Harry Goldman
|
|||
|
|
> TCBA
|
|||
|
|
> 3 Amy Lane
|
|||
|
|
> Queensbury, NY 12804
|
|||
|
|
> Tel: (518) 792-1003
|
|||
|
|
|
|||
|
|
RQ>Tell him I sent you!!!
|
|||
|
|
|
|||
|
|
Thanks! Will do
|
|||
|
|
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1337 Date: 11-23-93 11:16
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> Primary coils
|
|||
|
|
|
|||
|
|
Me again... This is exactly the info I need! I was wondering
|
|||
|
|
what would work best.
|
|||
|
|
|
|||
|
|
>primary coil should be large. I have seen lots of holdovers
|
|||
|
|
>from the classic age of coil building who insist on 2-3 turn
|
|||
|
|
>primaries and HUGE capacitors to achieve the proper frequency
|
|||
|
|
>of operation in the tank circuit.
|
|||
|
|
|
|||
|
|
RQ>This is wrong.
|
|||
|
|
|
|||
|
|
RQ>A tank circuit with a small capacitor, and a large primary
|
|||
|
|
>inductance, will reach down to the same frequencies of
|
|||
|
|
>operation. A tank circuit of this design will use less power,
|
|||
|
|
>and therefore require a smaller step up xfrmr. The capacitor
|
|||
|
|
>will be smaller, which further reduces the cost of the system.
|
|||
|
|
|
|||
|
|
Makes a lot of sense! Also, because of the losses in the
|
|||
|
|
capacitor, using a lower value will result in less loss...
|
|||
|
|
|
|||
|
|
RQ>So to give some advice to my friend Dave Halliday, who is
|
|||
|
|
>building a 6" secondary coil sometime in the near future,
|
|||
|
|
>plan on winding a primary coil from a conductor material that
|
|||
|
|
>I have listed above, and use a conductor length of around 75
|
|||
|
|
>feet. Your primary should end up about as wide as, or wider,
|
|||
|
|
>than your secondary is tall.
|
|||
|
|
|
|||
|
|
Got it! I was thinking of using some 3/8ths refrigeration tubing
|
|||
|
|
but since the surface area is important, I'll probably get a reel
|
|||
|
|
of 3/4ths or 1/2" tubing ( gotta check on pricing first )
|
|||
|
|
|
|||
|
|
Also, I wasn't thinking about the length of the primary and I
|
|||
|
|
only have about 20' of the small tubing.
|
|||
|
|
|
|||
|
|
I'll be going to Boeing today so they might have something there
|
|||
|
|
too.
|
|||
|
|
|
|||
|
|
Again - many thanks for the info - I have a pretty good handle on
|
|||
|
|
what is needed - like I said, probably building the capacitor
|
|||
|
|
over the Thanksgiving weekend - I'll be closing the store then...
|
|||
|
|
|
|||
|
|
Trade some videos / photos once I get something to show.
|
|||
|
|
|
|||
|
|
b QMPro 1.51 b Neurotoxin Lite! Tastes great... Less drooling...
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 3185 Date: 11-23-93 15:21
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: David Tiefenbrunn
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
DT> Tape recieved 11-20-93. As was the post quoted herein.
|
|||
|
|
|
|||
|
|
RQ> what you think of the spark. I was checking the tape for a
|
|||
|
|
RQ> minute as it was recording... Even I forget sometimes how
|
|||
|
|
RQ> awesome a 10" secondary looks with a proper discharger and
|
|||
|
|
RQ> 10 KVA pumped cleanly through it. I think you will agree,
|
|||
|
|
|
|||
|
|
DT> *Quite* awesome... Previously the largest Tesla coil
|
|||
|
|
DT> I had seen was in a science museum in Boston, MA.
|
|||
|
|
DT> It's spark was maybe 1/2 of the >small< coil in your
|
|||
|
|
DT> video. I *used* to think it was a big one.
|
|||
|
|
|
|||
|
|
Yup, we have one in our science muesum too. Small system putting
|
|||
|
|
out about 2' of spark. I decided I could do a little better if I
|
|||
|
|
put my mind to it.
|
|||
|
|
|
|||
|
|
DT> At what power level does it become dangerous to
|
|||
|
|
DT> draw spark with the pole?
|
|||
|
|
|
|||
|
|
This is a very good question. Very good. I routinely pull spark
|
|||
|
|
off of my coils with a key, pipe, or other conductor. It is not
|
|||
|
|
the power level of the spark that makes a difference, it is the
|
|||
|
|
quality of insulation you are standing on and the distance you
|
|||
|
|
place yourself from ground. I have had sparks coming off of my
|
|||
|
|
shoes over a foot long while in direct contact with voltages of
|
|||
|
|
at least a million volts. I can light 40 watt bulbs from the
|
|||
|
|
CURRENT heating the filament, and my body in series with the
|
|||
|
|
circuit.
|
|||
|
|
|
|||
|
|
Power arcs leaving the body and hitting the ground are very
|
|||
|
|
dangerious, especially for those who are more shock sensitive
|
|||
|
|
than myself. I do not experience "shocks" in these instances, but
|
|||
|
|
do feel the RF burns. I have also had a few RF burns from change,
|
|||
|
|
keys, etc. on my person, as well as having lost all the magnetic
|
|||
|
|
strips on my bank and credit cards. My brother lost a nice
|
|||
|
|
digital watch once.
|
|||
|
|
|
|||
|
|
But, if you know what you are doing, and the system is well set
|
|||
|
|
up in proper tune, it is OK to take up to 5 kVA output through a
|
|||
|
|
conductor to your person. But this is not recommended for
|
|||
|
|
amateurs.
|
|||
|
|
|
|||
|
|
There IS a danger with certain tank circuits. I never ground the
|
|||
|
|
tank circuit or the primary coil, nor do I connect the secondary
|
|||
|
|
anywhere to the tank circuit or the primary. Coils with the
|
|||
|
|
primary and secondary connected, or both grounded to system
|
|||
|
|
ground can be LETHAL!!!! This allows an open pathway for deadly
|
|||
|
|
60 cycle from the step up xformer to appear in the spark
|
|||
|
|
discharge. I avoid this problem by never using these circuits. My
|
|||
|
|
tank circuits and primary coils float ungrounded. Remember tank
|
|||
|
|
circuits are always deadly. A person with a conductor in hir hand
|
|||
|
|
and approaching a Tesla coil had better know the circuit, and
|
|||
|
|
have a cool head. Accidental contact with a primary coil or tank
|
|||
|
|
circuit has thought provoking possibilities.
|
|||
|
|
|
|||
|
|
Like I stated in my original post when offering video: I cannot
|
|||
|
|
be responsible for people attempting to reproduce any of the
|
|||
|
|
experiments that I perform on the tape. I know what I am doing.
|
|||
|
|
|
|||
|
|
DT> The one I built when I was in college (over 10 years
|
|||
|
|
DT> ago) had 230W input, but I didn't have all the details
|
|||
|
|
DT> of how to optimize / tune it.
|
|||
|
|
|
|||
|
|
You do now!
|
|||
|
|
|
|||
|
|
DT> It still threw sparks a few inches long. It also had a
|
|||
|
|
DT> nasty static charge that would build up while it was
|
|||
|
|
DT> running, and while I drew sparks (with a rod) the static
|
|||
|
|
DT> charge would pop and I'd get a jolt. Your coils never
|
|||
|
|
DT> displayed that particular problem in the video, just nice
|
|||
|
|
DT> clean HV RF.
|
|||
|
|
|
|||
|
|
Yup, they do run clean. Very little RFI, high output, and
|
|||
|
|
efficient. Even my little temporary test setups perform better
|
|||
|
|
than most peoples end product. Having seen a lot of coils, and
|
|||
|
|
talking with people that build them, I feel qualified to post
|
|||
|
|
to "ALL". Nobody here has said any different. I know the circuits
|
|||
|
|
and systems to the point where I literally dream about them
|
|||
|
|
sometimes. I have set up and fired systems in my dreams several
|
|||
|
|
times, and I find the data I get from there is as valid as
|
|||
|
|
anything I do while awake.
|
|||
|
|
|
|||
|
|
DT> I'm going to show a few friends your tape.
|
|||
|
|
|
|||
|
|
Please do. All I ask is that you do not make copies without my
|
|||
|
|
permission.
|
|||
|
|
|
|||
|
|
DT> One of them has a small (by your standards) coil. His
|
|||
|
|
DT> coil's primary is wound like a regular coil, not flat like
|
|||
|
|
DT> yours (or for that matter, the others I've seen. I will have
|
|||
|
|
DT> to check with him to find out why.
|
|||
|
|
|
|||
|
|
Most likely his plan or design hails back to the "classic" era of
|
|||
|
|
coil building where a vertical helix primnary (all primary turns
|
|||
|
|
equally spaced from the secondary) was common. This type primary
|
|||
|
|
is used to couple energy into systems using the "classic" style,
|
|||
|
|
space wound or low inductance secondary coil. The design I
|
|||
|
|
promote has been completely modernized and takes full advantage
|
|||
|
|
of modern high Q construction materials. The very high inductance
|
|||
|
|
secondary is so much more efficient that you have to reduce the
|
|||
|
|
aspect ratio of the primary coil or it will force a breakdown of
|
|||
|
|
the secondary from overloading. Then I use toroids to balance the
|
|||
|
|
secondary right to the load limit. The result of this work on my
|
|||
|
|
10" coil has yielded sparks to the strike rail protecting the
|
|||
|
|
primary that are as fat as my leg, and up to 15' full current
|
|||
|
|
strikes. The spark is fully five times the length of the
|
|||
|
|
secondary winding which is only 32" high.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1340 Date: 11-23-93 17:49
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Joseph Freivald
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
JF>For those of us who are wanna bees, What's a tesla coil, and
|
|||
|
|
>why does it get at least 10 posts per day?
|
|||
|
|
|
|||
|
|
JF> Just trying to catch up,
|
|||
|
|
> Joe
|
|||
|
|
|
|||
|
|
|
|||
|
|
Hi Joe - the Tesla coil is basically a high-frequency resonant
|
|||
|
|
air transformer - oscillator system. It was developed by a
|
|||
|
|
wonderful genius / wildman Nikola Tesla ( 1856-1943 ) as a means
|
|||
|
|
of generating very high voltage as well as power transmission.
|
|||
|
|
|
|||
|
|
Richard has a great two hour video tape of his work which he will
|
|||
|
|
send to you for the following: ten bucks, a blank good quality
|
|||
|
|
tape, and a postage paid mailer.
|
|||
|
|
|
|||
|
|
It is well worth it! His "big" coil is about 4' tall and fires
|
|||
|
|
continuous bolts of lightning from nine to fifteen feet! This is
|
|||
|
|
a point-to-point measure too so add in about 30% for the twists
|
|||
|
|
of the arc!
|
|||
|
|
|
|||
|
|
I used to be into them when I was a teenager and had always
|
|||
|
|
thought about getting back into it but the stuff he is working on
|
|||
|
|
has convinced me! I will be working with a couple friends (
|
|||
|
|
sharing work 'n money ) and we are starting work on parts of it
|
|||
|
|
this thanksgiving holiday.
|
|||
|
|
|
|||
|
|
It is interesting too because the "classical" design for a tesla
|
|||
|
|
coil is quite different from the actual best design. The
|
|||
|
|
classical design goes for long thin coils ( maybe 30" by 3" dia )
|
|||
|
|
and just two or three turns of wire for the primary whereas the
|
|||
|
|
actual best design calls for much shorter / fatter coils and lots
|
|||
|
|
of primary turns ( 10 - 15 )
|
|||
|
|
|
|||
|
|
My friends and I have arrived on a basic design - 6" diameter and
|
|||
|
|
30" long, fixed spark gap, 12kV neon sign transformer and
|
|||
|
|
homemade capacitor. Richard mentioned that he once built one
|
|||
|
|
just like this and he was able to get 5' bolts!
|
|||
|
|
|
|||
|
|
Anyway, the posts are well worth saving, send away for the video
|
|||
|
|
tape too - it makes for fantastic viewing!
|
|||
|
|
|
|||
|
|
b WOW!! *Nice* spark, Nick! Nick? NIKOLAI, WAKE UP!!
|
|||
|
|
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1126 Date: 11-23-93 23:43
|
|||
|
|
From: David Tiefenbrunn
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
On 11-19-93 Richard Quick wrote to David Tiefenbrunn...
|
|||
|
|
|
|||
|
|
RQ> New lab so far is looking good. Expensive, contractor wants
|
|||
|
|
RQ> $32.50 per square foot.
|
|||
|
|
|
|||
|
|
Have you "shopped" the local contractors much?
|
|||
|
|
I would thing you could get a pretty good deal
|
|||
|
|
with the terrible resession were in.:) In CT
|
|||
|
|
things are still slow, anyway.
|
|||
|
|
|
|||
|
|
RQ> BTW I will trade tapes happily if anyone has goodies I would
|
|||
|
|
RQ>be interested in. Video tape is an excellent way to archive
|
|||
|
|
RQ>our little projects;
|
|||
|
|
|
|||
|
|
I agree. I still sometimes forget to get the dang thing before
|
|||
|
|
"throwing the switch" though.
|
|||
|
|
|
|||
|
|
RQ> not only are they useful as a personal reference, but they
|
|||
|
|
RQ> are amazingly effective teaching tools. Nothing explains
|
|||
|
|
RQ> something like a coil project as well as the designer/
|
|||
|
|
RQ> operator pointing to, and talking about, the operational
|
|||
|
|
RQ> working equipment.
|
|||
|
|
|
|||
|
|
Of course, most of my projects haven't been as striking as the
|
|||
|
|
10KVA Tesla coil, but it is nice to have them on record.
|
|||
|
|
|
|||
|
|
BTW, is that Tesla Coil Builders Association sticker on the big
|
|||
|
|
control panel for real? I never in 1K years would have thought
|
|||
|
|
there was such a thing.
|
|||
|
|
|
|||
|
|
Dave
|
|||
|
|
|
|||
|
|
! Origin: =Abbey Road BBS= Higganum, Ct. (203)345-7635
|
|||
|
|
(1:320/5967)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1143 Date: 11-24-93 01:29
|
|||
|
|
From: George Powell
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: Re: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
I bet tesla was a fun person to live by..made the locals life
|
|||
|
|
real interesting..
|
|||
|
|
|
|||
|
|
;)
|
|||
|
|
|
|||
|
|
! Origin: Fruity Dog Support (1:2460/21)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1125 Date: 11-25-93 11:59
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 1,000,000KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
DH> Once again - THANKS!
|
|||
|
|
|
|||
|
|
No problem
|
|||
|
|
|
|||
|
|
DH> Also, just had a bit of a "conceptual" breakthrough - was
|
|||
|
|
DH> trying to see why 1/4 wave was best and then saw that this
|
|||
|
|
DH> is 1/4 wave reflected over a ground plane...
|
|||
|
|
|
|||
|
|
DH> Makes a lot of sense ( arcs too )
|
|||
|
|
|
|||
|
|
Yeah, It took me a few minutes of looking at sine, then a 1/4
|
|||
|
|
wave antenna before I realized what was going on and was able to
|
|||
|
|
conceptualize in my mind. Only then did Tesla's repeated use of
|
|||
|
|
the terms "fundamental note" and "harmonic" make sense.
|
|||
|
|
|
|||
|
|
The length of wire vibrates electrically and is more or less the
|
|||
|
|
perfect analogy of a musical string. When the length of wire is
|
|||
|
|
wound to form a coil, it is simply compressed into a smaller
|
|||
|
|
volume where it can be efficiently excited.
|
|||
|
|
|
|||
|
|
Now you can force that length of wire to accept SOME energy at
|
|||
|
|
any frequency, but the wire has a natural "hot spot" of
|
|||
|
|
resonance, just like a musical string has it's natural note.
|
|||
|
|
|
|||
|
|
A function of the coil, and it's natural resonance, is such that
|
|||
|
|
it offers low impedance at the base for currents that match it's
|
|||
|
|
natural resonate frequency. So if the coil has a natural
|
|||
|
|
resonance of say 250 kHz, and current at 250 kHz is fed into the
|
|||
|
|
base, the coil will take it up. Current will flow. Current of any
|
|||
|
|
other frequency sees a very high impedance.
|
|||
|
|
|
|||
|
|
But at the top of the resonating coil you do not see current. The
|
|||
|
|
coil "converts" the base current into a voltage at the other end.
|
|||
|
|
Since this voltage rises as you go higher and higher up the coil,
|
|||
|
|
and reaches it's peak at the top; Tesla was able to determine the
|
|||
|
|
voltage at the top of the coil is the first 1/4 wave voltage peak
|
|||
|
|
of the RF current fed into the bottom.
|
|||
|
|
|
|||
|
|
A good term to introduce here is VSWR, for Voltage Standing Wave
|
|||
|
|
Ratio. The coil at resonance establishes a standing wave of the
|
|||
|
|
resonate frequency. The bottom of the wave is a low potential,
|
|||
|
|
such as your RF ground. From this low potential base, the
|
|||
|
|
standing wave is established, and voltage increases as we move
|
|||
|
|
higher up to the top of the coil.
|
|||
|
|
|
|||
|
|
In order to get a handle on the true resonate frequency of a coil
|
|||
|
|
I use a signal generator, o'scope, and a frequency counter. The
|
|||
|
|
signal generator produces about a 2 volt signal that can be
|
|||
|
|
varied in frequency. I place a 1K resistor between the signal
|
|||
|
|
generator output and the o'scope input. Now the o'scope measures
|
|||
|
|
voltage. The higher the wave on the scope, the higher the voltage
|
|||
|
|
present in the signal generator output.
|
|||
|
|
|
|||
|
|
The output of the frequency generator is fed to the base wire of
|
|||
|
|
the coil, and the frequency of the output is varied while
|
|||
|
|
watching the o'scope. When the frequency of the signal generator
|
|||
|
|
matches that of the coil, the coil takes up the current. Because
|
|||
|
|
current flows into the base of the coil at resonance, there is a
|
|||
|
|
voltage drop in the signal generator output line. This voltage
|
|||
|
|
drop is measured by the o'scope (across the 1K resistor) and is
|
|||
|
|
know as a "grid dip". The wave on the scope drops to nearly a
|
|||
|
|
flat line. When I see a grid dip I know I have matched the signal
|
|||
|
|
generator output to the coils natural resonate frequency. By also
|
|||
|
|
running a frequency counter connected to the signal generator, I
|
|||
|
|
can tell precisely the frequency of the input current.
|
|||
|
|
|
|||
|
|
So in this little example, with a coil resonating at 250 kHz; the
|
|||
|
|
coil is resonating at 250 kHz and accepts 250 kHz current at the
|
|||
|
|
base. The current flow is high, the base impedance is low. As you
|
|||
|
|
measure voltage up the coil, the voltage rises until you get to
|
|||
|
|
the top of the coil. At the top of the coil you find the maximum
|
|||
|
|
voltage peak. This is the first voltage peak of the RF current
|
|||
|
|
fed into the base, and represents the 1/4 wave point of the
|
|||
|
|
input frequency current. So you have a 250 kHz coil, with a 1/4
|
|||
|
|
wave voltage output. 250 kHz input, 1/4 wave voltage output,
|
|||
|
|
helical resonator; or 250 kHz 1/4 wave Tesla coil.
|
|||
|
|
|
|||
|
|
We know the coil does not require current fed to the base to
|
|||
|
|
become excited. Oscillating magnetic field flux at the resonate
|
|||
|
|
frequency will highly excite the coil. The coil also having the
|
|||
|
|
property of inductance. So the coil can become highly excited by
|
|||
|
|
placing it in close proximity to a high powered oscillator, which
|
|||
|
|
is the Tesla tank circuit. Excitation by field flux produces
|
|||
|
|
equal engery output from both ends of the coil. Current from the
|
|||
|
|
bottom, and voltage from the top. It becomes clear now why such
|
|||
|
|
heavy RF grounds are required for Tesla coil work, and why the RF
|
|||
|
|
ground must be isolated from all other equipment.
|
|||
|
|
|
|||
|
|
DH> ::Status report::
|
|||
|
|
|
|||
|
|
DH> Got some PVC pipe - flimsy stuff but I will use wooden
|
|||
|
|
DH> braces to hold it circular while I wind it. Actually, will
|
|||
|
|
DH> probably cut out some plexi circles and glue them in...
|
|||
|
|
|
|||
|
|
Plug the ends of the coil form with something to hold it round
|
|||
|
|
while it is wound. Once wound, the wire will stiffen the coil
|
|||
|
|
form and hold the shape. When you glue the endcaps on the form,
|
|||
|
|
it will be plenty sturdy.
|
|||
|
|
|
|||
|
|
DH> Question - there are some very cheap cutting boards
|
|||
|
|
DH> available made out of a high-density polyethylene plastic -
|
|||
|
|
DH> was thinking of using them for the "breadboard" for the
|
|||
|
|
DH> transformer protection stuff as well as the base of the coil
|
|||
|
|
DH> - do you have any feedback on the Q of this material?
|
|||
|
|
|
|||
|
|
Pretty good choice of material for for a filter board.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1244 Date: 11-26-93 01:00
|
|||
|
|
From: Guy Daugherty
|
|||
|
|
To: George Powell
|
|||
|
|
Subj: Re: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
GP>I bet tesla was a fun person to live by..made the locals life
|
|||
|
|
GP>real interesting..
|
|||
|
|
|
|||
|
|
GP>;)
|
|||
|
|
|
|||
|
|
You might say it brightened up their lives. Brought a little
|
|||
|
|
spark into them, so to speak.
|
|||
|
|
|
|||
|
|
! Origin: The Silhouetter bbs (209)472-0843 USR DS V32terbo
|
|||
|
|
(1:208/216)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1209 Date: 11-26-93 23:28
|
|||
|
|
From: David Tiefenbrunn
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
On 11-23-93 Richard Quick wrote to David Tiefenbrunn...
|
|||
|
|
|
|||
|
|
RQ> DT> *Quite* awesome... Previously the largest Tesla coil
|
|||
|
|
RQ> DT> I had seen was in a science museum in Boston, MA.
|
|||
|
|
RQ> DT> It's spark was maybe 1/2 of the >small< coil in your
|
|||
|
|
RQ> DT> video. I *used* to think it was a big one.
|
|||
|
|
RQ>
|
|||
|
|
RQ> Yup, we have one in our science muesum too. Small system
|
|||
|
|
RQ> putting out about 2' of spark. I decided I could do a little
|
|||
|
|
RQ> better if I put my mind to it.
|
|||
|
|
|
|||
|
|
You shure did. :)
|
|||
|
|
|
|||
|
|
RQ> DT> At what power level does it become dangerous to
|
|||
|
|
RQ> DT> draw spark with the pole?
|
|||
|
|
RQ>
|
|||
|
|
RQ> This is a very good question. Very good. I routinely pull
|
|||
|
|
RQ> spark off of my coils with a key, pipe, or other conductor.
|
|||
|
|
...
|
|||
|
|
RQ> Power arcs leaving the body and hitting the ground are very
|
|||
|
|
RQ> dangerious, especially for those who are more shock
|
|||
|
|
RQ> sensitive than myself. I do not experience "shocks" in these
|
|||
|
|
RQ> instances, but do feel the RF burns. I have also had a few
|
|||
|
|
RQ> F burns from change, keys, etc. on my person, as well as
|
|||
|
|
RQ> having lost all the magnetic strips on my bank and credit
|
|||
|
|
RQ> cards. My brother lost a nice digital watch once.
|
|||
|
|
RQ>
|
|||
|
|
RQ> But, if you know what you are doing, and the system is well
|
|||
|
|
RQ> set up in proper tune, it is OK to take up to 5 kVA output
|
|||
|
|
RQ> through a conductor to your person. But this is not
|
|||
|
|
R RQ> recommended for amateurs.
|
|||
|
|
|
|||
|
|
Reminds me of one of my dad's T shirts:
|
|||
|
|
I am a professional. DON'T try this at home.
|
|||
|
|
You should get one :)
|
|||
|
|
|
|||
|
|
It would seem that the important thing is to not allow a spark to
|
|||
|
|
jump directly to or from the body.
|
|||
|
|
|
|||
|
|
The first coil I made (back in grade school days) only threw a
|
|||
|
|
spark about 1/2 inch long. But I could let it jump directly to a
|
|||
|
|
finger with no shock or burn. Not enough power to do damage.
|
|||
|
|
|
|||
|
|
I do feel shocks (and burns), so I would hesitate before trying
|
|||
|
|
that with a large coil.
|
|||
|
|
|
|||
|
|
RQ> DT> I'm going to show a few friends your tape.
|
|||
|
|
RQ>
|
|||
|
|
RQ> Please do. All I ask is that you do not make copies without
|
|||
|
|
RQ> my permission.
|
|||
|
|
|
|||
|
|
O.K.
|
|||
|
|
|
|||
|
|
! Origin: =Abbey Road BBS= Higganum, Ct. (203)345-7635
|
|||
|
|
(1:320/5967)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1150 Date: 11-27-93 00:52
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: David Tiefenbrunn
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
DT> On 11-19-93 Richard Quick wrote to David Tiefenbrunn...
|
|||
|
|
|
|||
|
|
RQ> New lab so far is looking good. Expensive, contractor wants
|
|||
|
|
RQ> $32.50 per square foot.
|
|||
|
|
|
|||
|
|
DT> Have you "shopped" the local contractors much?
|
|||
|
|
DT> I would thing you could get a pretty good deal
|
|||
|
|
DT> with the terrible resession were in.:) In CT
|
|||
|
|
DT> things are still slow, anyway.
|
|||
|
|
|
|||
|
|
Yeah, I'm going to go "shopping" as soon as I can get motivated
|
|||
|
|
to spend 100G. Right now I am catching my breath from the sticker
|
|||
|
|
shock. The building should go up fast, and I don't plan to start
|
|||
|
|
until spring or early summer. This will give me a chance to shop
|
|||
|
|
around.
|
|||
|
|
|
|||
|
|
DT> BTW, is that Tesla Coil Builders Association sticker
|
|||
|
|
DT> on the big control panel for real? I never in 1K years
|
|||
|
|
DT> would have thought there was such a thing.
|
|||
|
|
|
|||
|
|
Yup It's for real.
|
|||
|
|
|
|||
|
|
Tesla Coil Builders Association
|
|||
|
|
Harry Goldman
|
|||
|
|
#3 Amy Lane
|
|||
|
|
Queensbury, NY 12804
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1151 Date: 11-27-93 01:26
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: George Powell
|
|||
|
|
Subj: Re: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
GP> I bet Tesla was a fun person to live by..made the locals
|
|||
|
|
GP> life real interesting..
|
|||
|
|
|
|||
|
|
There are several good (and true) stories about the local
|
|||
|
|
disturbances Tesla created.
|
|||
|
|
|
|||
|
|
One of the best concerns an electromechanical steam powered
|
|||
|
|
oscillator he constructed. Now the oscillator was built to
|
|||
|
|
provide a constant frequency field current for a RF alternator
|
|||
|
|
in his radio work. But he played around with the thing.
|
|||
|
|
|
|||
|
|
In New York he had a lab in the loft of a building for awhile, I
|
|||
|
|
don't have the exact address, but I can easily reference it if
|
|||
|
|
required. The building had a heavy iron center post in the
|
|||
|
|
construction. The post came up through the center of the loft and
|
|||
|
|
supported the roof peak. The base of the post was sunk into
|
|||
|
|
bedrock, and carried a considerable portion of the building load.
|
|||
|
|
|
|||
|
|
Tesla bolted the oscillator output shaft to the post and fired it
|
|||
|
|
up. As steam pressure in the boiler increased, so did the
|
|||
|
|
frequency of oscillation. He sat in a chair and observed the
|
|||
|
|
effects of the mechanical vibrations on objects at hand. Each
|
|||
|
|
object having a resonate frequency would begin to vibrate and
|
|||
|
|
move as the frequency of the oscillator matched it.
|
|||
|
|
|
|||
|
|
After about 30-40 minutes Tesla began to notice the building
|
|||
|
|
itself begin to sway, and saw beams unseat. He went to shut down
|
|||
|
|
the machine. To his dismay he found that his jury rigged steam
|
|||
|
|
line was too hot to approach, and/or the valve was seized. He
|
|||
|
|
looked around the lab for a minute or two and finally attacked
|
|||
|
|
the problem with an axe, severing the steam line and blowing
|
|||
|
|
clouds of live steam into the building.
|
|||
|
|
|
|||
|
|
As the steam cleared, he heard a knock at the door. Two of New
|
|||
|
|
York's finest stood in the doorway. Now Tesla was apparently no
|
|||
|
|
stranger to dealing with the authorities. He explained to the
|
|||
|
|
cops that they had arrived too late for the demonstration, and
|
|||
|
|
that an unfortunate problem prevented him from reproducing the
|
|||
|
|
test while they waited. He invited them back later in the day,
|
|||
|
|
and showed them out.
|
|||
|
|
|
|||
|
|
It seems the police had received frantic calls from people in a
|
|||
|
|
radius of several blocks reporting an earthquake. Walls,
|
|||
|
|
sidewalks, and foundations cracked, windows shattered, street
|
|||
|
|
lamps tilted askew, and stuff was falling out of cabinets and
|
|||
|
|
shelves. The police realized that the station itself was only
|
|||
|
|
subjected to a slight tremor, but officers reporting to the scene
|
|||
|
|
of the calls found the intensity increased as the drew near
|
|||
|
|
Tesla's lab. It did not take them long to figure out where the
|
|||
|
|
commotion was comming from. As I mentioned, Tesla was no stranger
|
|||
|
|
in dealing with local authorities.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1266 Date: 11-30-93 12:15
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: David Tiefenbrunn
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
RQ> DT> At what power level does it become dangerous to
|
|||
|
|
RQ> DT> draw spark with the pole?
|
|||
|
|
|
|||
|
|
RQ> This is a very good question. Very good. I routinely pull
|
|||
|
|
RQ> spark off of my coils with a key, pipe, or other conductor.
|
|||
|
|
DT> ...
|
|||
|
|
RQ> Power arcs leaving the body and hitting the ground are very
|
|||
|
|
RQ> dangerious, especially for those who are more shock
|
|||
|
|
RQ> sensitive than myself. I do not experience "shocks" in these
|
|||
|
|
RQ> instances, but do feel the RF burns. I have also had a few
|
|||
|
|
RQ> RF burns from change, keys, etc. on my person, as well as
|
|||
|
|
RQ> having lost all the magnetic strips on my bank and credit
|
|||
|
|
RQ> cards. My brother lost a nice digital watch once.
|
|||
|
|
|
|||
|
|
RQ> But, if you know what you are doing, and the system is well
|
|||
|
|
RQ> set up in proper tune, it is OK to take up to 5 kVA output
|
|||
|
|
RQ> through a conductor to your person. But this is not
|
|||
|
|
RQ> recommended for amateurs.
|
|||
|
|
|
|||
|
|
DT> Reminds me of one of my dad's T shirts:
|
|||
|
|
DT> I am a professional. DON'T try this at home.
|
|||
|
|
DT> You should get one :)
|
|||
|
|
|
|||
|
|
DT> It would seem that the important thing is to not
|
|||
|
|
DT> allow a spark to jump directly to or from the body.
|
|||
|
|
|
|||
|
|
Yes I would tend to agree with this, especially at higher powers.
|
|||
|
|
The charge density and amount of power alone can be dangerious,
|
|||
|
|
despite the output of the coil being clean RF. I don't know if
|
|||
|
|
the resolution on the tape is good enough to see but in the shot
|
|||
|
|
where I am pulling a few feet of spark off the coil with a copper
|
|||
|
|
pipe, there are some 6" - 8" sparks comming off my feet. Since I
|
|||
|
|
am standing on an insulated platform, and my shoes socks are
|
|||
|
|
sweaty, I only get a tingling sensation.
|
|||
|
|
|
|||
|
|
Another thing to caution about is being in series with a power
|
|||
|
|
arc from the discharge terminal, even if the actual arc leaves a
|
|||
|
|
conductor such as a pipe or what not. Again the charge density is
|
|||
|
|
just too high on a big coil to make this safe. I have been placed
|
|||
|
|
in an uncomfortable position or two where this has happened, and
|
|||
|
|
the operator of the coil needs to have a cool head and be very
|
|||
|
|
familiar with the controls. I wish I had these incidents recorded
|
|||
|
|
on video tape.
|
|||
|
|
|
|||
|
|
When doing the million volts through the body trick, or other HV
|
|||
|
|
RF experiments when in physical contact to the output, discharge
|
|||
|
|
must be radiated or arced through the air, not to ground. Power
|
|||
|
|
arcs to ground while in series with the circuit is "eye opening"
|
|||
|
|
to say the least, and can make your fillings really sing.
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2224 Date: 12-01-93 00:01
|
|||
|
|
From: Dave Lyle
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 1,000,000Kva Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>coil "converts" the base current into a voltage at the other
|
|||
|
|
RQ>end. Since this voltage rises as you go higher and higher up
|
|||
|
|
RQ>the coil, and reaches it's peak at the top; Tesla was able to
|
|||
|
|
RQ>determine the voltage at the top of the coil is the first 1/4
|
|||
|
|
RQ>wave voltage peak of the RF current fed into the bottom.
|
|||
|
|
|
|||
|
|
Richard, GREAT series of articles here. Just a quick question
|
|||
|
|
here. First, I understand what is happening as far as the 1/4
|
|||
|
|
wave length is concerned. I relate this to transmission line
|
|||
|
|
theory, where the VSWR is approaching infinity. My question
|
|||
|
|
though, is..how does the coil excite at other odd multiples of
|
|||
|
|
1/4 wave, i.e. 3/4, 5/4 wave? I suspect it would be more lossy,
|
|||
|
|
but what, if any, benefits might be derived by operating at the
|
|||
|
|
higher frequency?
|
|||
|
|
|
|||
|
|
Dave
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1390 Date: 12-01-93 12:37
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> DH> Status report:
|
|||
|
|
|
|||
|
|
RQ> DH> Got the wire for the secondary as well as the basic
|
|||
|
|
RQ> DH> design.
|
|||
|
|
|
|||
|
|
RQ>OK, I got some soft figures for you. Given the specs of the
|
|||
|
|
>planned coil you gave me here's what your looking at:
|
|||
|
|
|
|||
|
|
RQ>Bare secondary frequency around ~260 kHz
|
|||
|
|
>Secondary top loaded with 18" diam, 4" cross section toriod
|
|||
|
|
>will resonate around ~180 kHz
|
|||
|
|
|
|||
|
|
Great! I will be using a torrid so I will make it this size.
|
|||
|
|
|
|||
|
|
RQ>These numbers are going to off a little, but I tuned a guys
|
|||
|
|
>coil once over the telephone when he was six states away. I
|
|||
|
|
>was throwing stuff off the top of my head.
|
|||
|
|
|
|||
|
|
Stuff like that is so much fun when it happens <grin> I am
|
|||
|
|
called to do computer diagnoses over the phone a lot and it
|
|||
|
|
amazes people that I can just listen to them for a few minutes
|
|||
|
|
and then rattle off a list of keys to hit...
|
|||
|
|
|
|||
|
|
|
|||
|
|
RQ> DH> Also, found a *wonderful* three terminal plus ground RF
|
|||
|
|
> DH> filter for 240 volt @ 60 Hz rated at 60 amps! $20 -
|
|||
|
|
> DH> couldn't resist!
|
|||
|
|
|
|||
|
|
RQ>I would have picked it up too. This is looking good, be sure
|
|||
|
|
>to run the filter backwards. If your using only one filter,
|
|||
|
|
>place it between in the supply line before the variac. Ground
|
|||
|
|
>the case to your 60 cycle neutral.
|
|||
|
|
|
|||
|
|
Great! I didn't think about hooking it up "backwards" but that
|
|||
|
|
makes perfect sense! I will be just using that one filter so that
|
|||
|
|
is where it will be connected.
|
|||
|
|
|
|||
|
|
RQ> DH> Still looking for a source of the form for the secondary
|
|||
|
|
> DH> the stuff I saw at a local Home Depot was poorly out of
|
|||
|
|
> DH> round...
|
|||
|
|
> DH> Maybe some plexiglass disks glued inside to maintain
|
|||
|
|
> DH> shape.
|
|||
|
|
|
|||
|
|
RQ>I would avoid using baffels inside the coil form, they tend to
|
|||
|
|
>reduce the Q of the coil. Find a different supplier for some
|
|||
|
|
>rounder pipe before you go this route.
|
|||
|
|
|
|||
|
|
That was my opinion too - it would give an electrical "bump" in
|
|||
|
|
the tube, not something to have in a tuned system.
|
|||
|
|
|
|||
|
|
RQ> DH> Have a bunch of 3/8" refrigeration tubing that I can use
|
|||
|
|
> DH> for the primary -
|
|||
|
|
|
|||
|
|
RQ>Just fine for this sized primary coil, make sure it is long
|
|||
|
|
>enough, though you can braze in a splice for added length.
|
|||
|
|
|
|||
|
|
OK - I mentioned in another post that I just have about 30' of
|
|||
|
|
it. I'll measure what the primary will take and then get some
|
|||
|
|
more. Got an Oxy / Acetylene torch so brazing pieces together is
|
|||
|
|
not a problem.
|
|||
|
|
|
|||
|
|
RQ> DH> Still need to get the step-up transformer - already have
|
|||
|
|
> DH> a 12kV 30mA neon but the "potential" transformers you
|
|||
|
|
|
|||
|
|
RQ>If you use 12 kv neons you will need about 120 ma total to
|
|||
|
|
>drive this coil to good spark. That's four 12,30s.
|
|||
|
|
|
|||
|
|
I will be checking with some neon sign places in the next day for
|
|||
|
|
a couple more transformers. There is one fairly close by me that
|
|||
|
|
does a lot of "art" signs and stuff.
|
|||
|
|
|
|||
|
|
RQ> DH> Anyway - work progresses - I will be busy during this
|
|||
|
|
> DH> "holiday" season, also the people that were interested in
|
|||
|
|
> DH> working with me are still very very much interested -
|
|||
|
|
> DH> showed the primary person your video and their jaw
|
|||
|
|
> DH> dropped <grin>
|
|||
|
|
|
|||
|
|
RQ>His was not the first, and won't be the last!!! You should
|
|||
|
|
>have seen the look on MY face while I was running it! I was
|
|||
|
|
>20' away and under cover and the sparks looked like they were
|
|||
|
|
>going to wipe my nose for me.
|
|||
|
|
|
|||
|
|
I can well imagine! There is a local park that is situated on
|
|||
|
|
Lake Washington near where I live, I have been toying with the
|
|||
|
|
idea of firing the coil off there, maybe out on one of the boat
|
|||
|
|
docks. Drop a bunch of Aluminum flashing over into the water for
|
|||
|
|
the ground.
|
|||
|
|
|
|||
|
|
Could be kind of fun!
|
|||
|
|
|
|||
|
|
Anyway, I will talk with you later. Dave
|
|||
|
|
b Did you put the cat out? I didn't know it was burning.
|
|||
|
|
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1398 Date: 12-02-93 08:04
|
|||
|
|
From: Brian Carling
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
DH>My friends and I have arrived on a basic design - 6" diameter
|
|||
|
|
DH>and 30" long, fixed spark gap, 12kV neon sign transformer and
|
|||
|
|
DH>homemade capacitor. Richard mentioned that he once built one
|
|||
|
|
DH>just like this and he was able to get 5' bolts!
|
|||
|
|
|
|||
|
|
DH>Anyway, the posts are well worth saving, send away for the
|
|||
|
|
DH>video tape too - it makes for fantastic viewing!
|
|||
|
|
|
|||
|
|
What is his address? ANy chance I could get the design details on
|
|||
|
|
your smaller unit?
|
|||
|
|
|
|||
|
|
! Origin: _The_Attic_ [301-428-1970] 14.4K v.32b - (1:109/423)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1420 Date: 12-03-93 08:25
|
|||
|
|
From: James Woodruff
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: Re: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> Quoting Dave Halliday to Richard Quick <=-
|
|||
|
|
|
|||
|
|
DH> I can well imagine - I also did PA systems for bands for a while and
|
|||
|
|
DH> some of the perceptions about power and signal grounds were amazing.
|
|||
|
|
|
|||
|
|
DH> Not so much for their blind ignorance and lack of common sense but
|
|||
|
|
for
|
|||
|
|
DH> the fact that some of them were still alive <grin>
|
|||
|
|
|
|||
|
|
My church does not ground their amps. Is this to prevent ground
|
|||
|
|
loops, save the expense of an extra wire,or blind ignorance? This
|
|||
|
|
Is on their mobile equipment that they clip onto the service entry
|
|||
|
|
panel.They also hook their stage lights to the same ungrounded
|
|||
|
|
circuit. p r e t t y scary uh?
|
|||
|
|
|
|||
|
|
Please reply,so I can help them out. THANX
|
|||
|
|
|
|||
|
|
... A penny saved is ridiculous.......
|
|||
|
|
-!- GEcho/386 1.01+
|
|||
|
|
! Origin: Trinity ]I[ BBS -=[ Oklahoma City ]=- (405)691-2377
|
|||
|
|
(1:147/2777)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1575 Date: 12-04-93 15:52
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Brian Carling
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
BC>DH>My friends and I have arrived on a basic design - 6" diameter
|
|||
|
|
>and 30" long, fixed spark gap, 12kV neon sign transformer and
|
|||
|
|
>homemade
|
|||
|
|
|
|||
|
|
BC>DH>Anyway, the posts are well worth saving, send away for the video
|
|||
|
|
tape
|
|||
|
|
>DH>too - it makes for fantastic viewing!
|
|||
|
|
|
|||
|
|
BC>What is his address? ANy chance I could get the design details on your
|
|||
|
|
>smaller unit?
|
|||
|
|
|
|||
|
|
OK - here is his address excerpted from a message:
|
|||
|
|
|
|||
|
|
>a two hour video tape in exchange for: One blank (high quality)
|
|||
|
|
>VHS tape, a postage pre-paid return mailer, $10.00 to pay for my
|
|||
|
|
>time and effort in seeing that you get a high quality, two hour,
|
|||
|
|
>recording of my work. Note this offer is not made on my behalf to
|
|||
|
|
>make any money, and I am not resposible for anybody's safety
|
|||
|
|
>should they decide to replicate any of the experiments I perform.
|
|||
|
|
>I will send a glossy print for $1.00 and a SASE.
|
|||
|
|
|
|||
|
|
RQ>Richard T. Quick II, 10028 Manchester Rd., Suite 253, Glendale,
|
|||
|
|
>Missouri, 63122, USA
|
|||
|
|
|
|||
|
|
|
|||
|
|
You could scale down the design but I feel that the amount of time and
|
|||
|
|
money involved would be about the same regardless of what size coil you
|
|||
|
|
are building so why not go for a bigger one.
|
|||
|
|
|
|||
|
|
The one I am building is 6" diameter, 30" tall and is powered by a bank
|
|||
|
|
of four neon sign transformers.
|
|||
|
|
|
|||
|
|
Richard says that a coil like this will be capable of consistent five
|
|||
|
|
foot long arcs.
|
|||
|
|
|
|||
|
|
Down the road, I would like to experiment with a "pocket" coil or a
|
|||
|
|
tabletop model but you do need a very very good ground regardless of the
|
|||
|
|
size so this isn't something that you could take somewhere and casually
|
|||
|
|
set it up and expect to get good results.
|
|||
|
|
|
|||
|
|
Anyway, keep tuned to this conference and I will be letting people know
|
|||
|
|
how things are progressing!
|
|||
|
|
|
|||
|
|
TTYL - Dave <20>:-)
|
|||
|
|
b QMPro 1.51 b Never Wear Battery-Powered Clothing to a Formal Event.
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- WM v3.10/92-0434
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2318 Date: 12-06-93 11:17
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Joseph Freivald
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
JF> For those of us who are wanna bees, What's a tesla coil, and
|
|||
|
|
JF> why does it get at least 10 posts per day?
|
|||
|
|
|
|||
|
|
A Tesla Coil is an air core, RF resonate, transformer. It is a
|
|||
|
|
very efficient source of very high voltage RF energy. If it
|
|||
|
|
weren't for the problem I am having with my ASCII character set I
|
|||
|
|
would give you a wiring diagram.
|
|||
|
|
|
|||
|
|
Basically you take a high voltage pulse discharging capacitor and
|
|||
|
|
connect it to a large heavy coil. The cap is charged with a high
|
|||
|
|
voltage power supply (neon sign xfrmr, potential xfrmr, or power
|
|||
|
|
distribution xfrmr run backwards). The circuit consisting of the
|
|||
|
|
cap and coil is excited by discharging the cap through a spark
|
|||
|
|
gap. This way current of hundreds of amps at thousands of volts
|
|||
|
|
oscillate through the coil. Frequency of oscillation is dependant
|
|||
|
|
on the number of turns in the coil and the size of the cap.
|
|||
|
|
This is the basis of the Tesla Tank circuit.
|
|||
|
|
|
|||
|
|
The secondary coil or "Tesla coil" is a hollow form with several
|
|||
|
|
hundred turns of wire. This coil has a natural RF resonate
|
|||
|
|
frequency based primarily on the length of wire used in the
|
|||
|
|
winding. The tank circuit frequency is made to match the
|
|||
|
|
secondary natural frequency by tuning, changing the number of
|
|||
|
|
turns in the heavy primary coil or changing the value of the
|
|||
|
|
pulse discharging capacitor. When the tank circuit frequency is
|
|||
|
|
matched to the secondary frequency, and the coils are placed in
|
|||
|
|
close proximity, energy is exchanged and transformed.
|
|||
|
|
|
|||
|
|
RF voltages in the megavolts can be achieved with very high
|
|||
|
|
efficiency. The tank circuit literally converts line current into
|
|||
|
|
a series of rapid pulse dicharges with peak powers in the
|
|||
|
|
megawatt range. A simple coil setup is capable of producing more
|
|||
|
|
or less continous spark discharges several feet in length, or
|
|||
|
|
longer.
|
|||
|
|
|
|||
|
|
I cannot say why there are so many posts on the subject, except
|
|||
|
|
that the topic is interesting and I have had more than a few
|
|||
|
|
requests for information on these systems. I have sent out a few
|
|||
|
|
video tapes with some of the work I have done, and it has greatly
|
|||
|
|
accelerated the interest. My video features a coil system I built
|
|||
|
|
operating with 10,000 watts input power, generating peak powers
|
|||
|
|
of 22 megawatts, with a discharge voltage of between 3-5
|
|||
|
|
megavolts (or more). The system is able to produce arcs of
|
|||
|
|
synthetic lightning that strike out up to 15 feet.
|
|||
|
|
|
|||
|
|
I hope this answers your question. If you need any additional
|
|||
|
|
information, or have other questions, please feel free to post on
|
|||
|
|
this topic.
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2319 Date: 12-06-93 11:33
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
RQ>A tank circuit with a small capacitor, and a large primary
|
|||
|
|
>inductance, will reach down to the lower frequencies of
|
|||
|
|
>operation. A tank circuit of this design will use less power,
|
|||
|
|
>and therefore require a smaller step up xfrmr. The capacitor
|
|||
|
|
>will be smaller, which further reduces the cost of the
|
|||
|
|
>system.
|
|||
|
|
|
|||
|
|
DH> Makes a lot of sense!
|
|||
|
|
|
|||
|
|
Efficiency, efficiency... Put every watt into the discharge!
|
|||
|
|
|
|||
|
|
RQ>So to give some advice to my friend Dave Halliday, who is
|
|||
|
|
>building a 6" secondary coil sometime in the near future,
|
|||
|
|
>plan on winding a primary coil from a conductor material that
|
|||
|
|
>I have listed above, and use a conductor length of around 75
|
|||
|
|
>feet. Your primary should end up about as wide as, or wider,
|
|||
|
|
>than your secondary is tall.
|
|||
|
|
|
|||
|
|
DH> Got it! I was thinking of using some 3/8ths refrigeration
|
|||
|
|
>tubing but since the surface area is important, I'll probably
|
|||
|
|
>get a reel of 3/4ths or 1/2" tubing ( gotta check on pricing
|
|||
|
|
>first )
|
|||
|
|
|
|||
|
|
With a 6" secondary coil that is 24" high, 3/8" soft copper water
|
|||
|
|
pipe is perfect. My big coil uses 1/2" pipe and only gets
|
|||
|
|
slightly warm on the first and second turns after a five minute
|
|||
|
|
full power run. Balance the diameter of the pipe to the length of
|
|||
|
|
the primary conductor. 50' conductor use 1/4" pipe, 75' conductor
|
|||
|
|
use 3/8" pipe, 100' conductor use 1/2" pipe. When is doubt use
|
|||
|
|
the next size up.
|
|||
|
|
|
|||
|
|
DH> Trade some videos / photos once I get something to show.
|
|||
|
|
|
|||
|
|
COOL!
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 4 Date: 06 Dec 93 12:45:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
DH> There is a local park that is situated on Lake Washington
|
|||
|
|
DH> near where I live, I have been toying with the idea of
|
|||
|
|
DH> firing the coil off there, maybe out on one of the boat
|
|||
|
|
DH> docks. Drop a bunch of Aluminum flashing over into the water
|
|||
|
|
DH> for the ground.
|
|||
|
|
|
|||
|
|
DH> Could be kind of fun!
|
|||
|
|
|
|||
|
|
I have fired and grounded off of water grounds exactly as you are
|
|||
|
|
thinking. They work great!
|
|||
|
|
|
|||
|
|
Good Luck! I hope to see a spark shot or two soon. Bring the
|
|||
|
|
camcorder, and a 35 mm, and a few friends.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2323 Date: 12-06-93 13:11
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
OK, People who are interested in the TESLA VIDEO have not, are
|
|||
|
|
not, and will not be dissapointed.
|
|||
|
|
|
|||
|
|
I will send a full 2 hour SP recorded, one off master, VHS tape
|
|||
|
|
with sections showing my big coil literally burning up the back
|
|||
|
|
driveway and striking everything within 11 feet (arcs as big
|
|||
|
|
around as my leg on some strikes).
|
|||
|
|
|
|||
|
|
You must send $10.00, a self addressed postage pre-paid return
|
|||
|
|
mailer, and a blank, high quality VHS tape.
|
|||
|
|
|
|||
|
|
Richard T. Quick II
|
|||
|
|
10028 Manchester Rd.
|
|||
|
|
Suite 253
|
|||
|
|
Glendale, MO 63122 USA
|
|||
|
|
|
|||
|
|
Tapes are sent out within 48 hours from receipt of your package,
|
|||
|
|
there is no monkey business. The video is instructive: it shows
|
|||
|
|
several coil systems in operation, details on the power control
|
|||
|
|
cabinet, wiring, tuning and firing as well as sections on spark
|
|||
|
|
gaps, RF filter chokes, etc. I also fire my "pole pig" utility
|
|||
|
|
power distribution transformer in a Jacob's Ladder at 8000 watts
|
|||
|
|
with 20,000 volts across the rails.
|
|||
|
|
|
|||
|
|
This tape is my cutting edge 1/4 wave Tesla work, and involves
|
|||
|
|
lots of high voltage set ups and demonstrations. Due to the
|
|||
|
|
nature of the work covered on the video: I CANNOT BE RESPONSIBLE
|
|||
|
|
FOR THE SAFETY OF ANYONE ATTEMPTING TO REPRODUCE ANY OF THE
|
|||
|
|
SYSTEMS OR EXPERIMENTS FEATURED ON THE VIDEO!!!!
|
|||
|
|
|
|||
|
|
I am more than happy to answer any questions or respond to
|
|||
|
|
comments in this area on anything covered on the video.
|
|||
|
|
I will also trade tapes even with people who are engaged in
|
|||
|
|
similar or other work of interest: Tesla coils or other high
|
|||
|
|
voltage equipment in action, rail guns, laser setups, taser guns,
|
|||
|
|
particle accelerators, capacitive discharge machines, etc.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2320 Date: 12-06-93 13:12
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Lyle
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
DL> Richard,
|
|||
|
|
DL> GREAT series of articles here.
|
|||
|
|
|
|||
|
|
Thanks! Another vote of confidence!
|
|||
|
|
|
|||
|
|
DL> Just a quick question here. First, I understand what is
|
|||
|
|
DL> happening as far as the 1/4 wave length is concerned. I
|
|||
|
|
DL> relate this to transmission line theory, where the VSWR is
|
|||
|
|
DL> approaching infinity.
|
|||
|
|
|
|||
|
|
You are correct in this relation. Transmission line theory does
|
|||
|
|
apply to Tesla secondaries.
|
|||
|
|
|
|||
|
|
DL> My question though, is.. how does the coil excite at other
|
|||
|
|
DL> odd multiples of 1/4 wave, i.e. 3/4, 5/4 wave? I suspect it
|
|||
|
|
DL> would be more lossy., but what, if any, benefits might be
|
|||
|
|
DL> derived by operating at the higher frequency?
|
|||
|
|
|
|||
|
|
Coils that are excited or driven to higher harmonics (over 1/4
|
|||
|
|
wave) break down prior to the top turns. For instance a coil
|
|||
|
|
driven to 3/4 wave resonance would still break down at the 1/4
|
|||
|
|
wave point of the winding. This problem is commonly seen on coils
|
|||
|
|
that are overdriven or overcoupled, and I cannot imagine any way
|
|||
|
|
to insulate against this breakdown. Higher harmonics CAN be
|
|||
|
|
reached by using two or more coils driven from the same tank
|
|||
|
|
circuit or by placing the primary in the center of a single coil.
|
|||
|
|
For instance a 1/2 wave system could be built using two coils, or
|
|||
|
|
driving one coil from the center producing two 1/4 wave peaks,
|
|||
|
|
one at either end.
|
|||
|
|
|
|||
|
|
The trick to efficiency is to excite at a LOWER harmonic (below
|
|||
|
|
1/4 wave), ie: 1/8th wave, 1/16 wave, or 1/32 wave. These lower
|
|||
|
|
harmonics are high in current, and lower in voltage. Loss is
|
|||
|
|
reduced because the lower voltage leaks less, and the energy of
|
|||
|
|
the wave is a product of both current and voltage. The 1/8th wave
|
|||
|
|
harmonic appears to be the most efficient.
|
|||
|
|
|
|||
|
|
Now remember that we have not changed the frequency. The system
|
|||
|
|
frequency may remain the same, we are simply tapping the energy
|
|||
|
|
further back in the wave form. Tesla was able to force the
|
|||
|
|
secondary into these lower harmonics by the addition of the extra
|
|||
|
|
coil to the system, then reducing the number of turns in the
|
|||
|
|
secondary until it was 1/8th wave resonate. Current and voltage
|
|||
|
|
were then fed to the base of the extra coil resonator.
|
|||
|
|
|
|||
|
|
The advantages of using the extra coil, and tapping the secondary
|
|||
|
|
energy at a lower harmonic are many: Coupling between primary and
|
|||
|
|
secondary may be tightend up considerably, driving more energy
|
|||
|
|
through the system; the 1/8th wave output of the secondary
|
|||
|
|
contains 70% of the wave energy as opposed to the 50% obtained in
|
|||
|
|
1/4 wave output; there is much less voltage stress on the
|
|||
|
|
secondary which reduces the incident of breakdown and "splitting"
|
|||
|
|
(parasitic 1/4 wave peaks); current is removed from the secondary
|
|||
|
|
by transmission line to the extra coil, unloading the secondary
|
|||
|
|
for more input (allows higher break rates in the gap = greater
|
|||
|
|
throughput) and placing the main system VSWR in the uncoupled end
|
|||
|
|
resonator (extra coil); impedance, resistance, and distributed
|
|||
|
|
capacitance are also reduced with proper design and construction.
|
|||
|
|
|
|||
|
|
This production of a lower harmonic from the secondary by adding
|
|||
|
|
the extra coil to the system is a true breakthrough in Tesla
|
|||
|
|
power processing. This is the three coil Tesla Magnifier as Tesla
|
|||
|
|
developed to industrial porportions in Colorado Springs, and may
|
|||
|
|
be scaled back for very efficient "basement" systems. I have seen
|
|||
|
|
Magnifiers producing 100"+ arcs at 4100 watts input power, and
|
|||
|
|
have myself hit 72" with inputs around 2500 watts. I see a real
|
|||
|
|
gain of 40% in spark length for input power with this system.
|
|||
|
|
|
|||
|
|
Thank you for your input on transmission line theory and your
|
|||
|
|
question. I hope I have given a resonable and satisfactory
|
|||
|
|
response. If you have any other questions or coments I would be
|
|||
|
|
more than happy to reply to them.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2324 Date: 12-06-93 13:25
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Brian Carling
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> SEZ Brian Carling to Richard Quick <=-
|
|||
|
|
|
|||
|
|
BC> Richard - what is your address please?
|
|||
|
|
BC> I'd like details on sending for your $10 video about Tesla
|
|||
|
|
BC> generators. Thanks - Brian C.
|
|||
|
|
|
|||
|
|
You mispelled my name so this request did not come up in my
|
|||
|
|
personal mail scan. See my post of today to "ALL" for details of
|
|||
|
|
the Tesla Video.
|
|||
|
|
|
|||
|
|
As I have said before, and several regulars in the conference
|
|||
|
|
will attest to, the video is first rate.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1471 Date: 12-06-93 13:26
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
DH> Hi Richard - little note here - I don't know if you get a
|
|||
|
|
DH> British magazine called "Electronics World + Wireless World"
|
|||
|
|
DH> ( it used to be just Wireless World ) but the current issue
|
|||
|
|
DH> - November 1993 - arrived today and it is one to look at.
|
|||
|
|
|
|||
|
|
RQ>Yes, since you offered, please copy the article and send it
|
|||
|
|
>to me. I would be in your debt. This looks like an
|
|||
|
|
>interesting system.
|
|||
|
|
|
|||
|
|
DH> In the mail this afternoon!
|
|||
|
|
|
|||
|
|
Thanks a lot. I just got back from a weekend in Chicago with my
|
|||
|
|
new girlfriend (NICE!) and look forward to seeing it!
|
|||
|
|
|
|||
|
|
|
|||
|
|
... 9 out of 10 men who try Camels prefer women
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1655 Date: 12-07-93 11:29
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Brian Carling
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
BC>DH>RQ> DH> Have a bunch of 3/8" refrigeration tubing that I
|
|||
|
|
>DH> > DH> can use for the primary -
|
|||
|
|
|
|||
|
|
BC>DH>RQ>Just fine for this sized primary coil, make sure it is long
|
|||
|
|
>DH> >enough, though you can braze in a splice for added length.
|
|||
|
|
|
|||
|
|
BC>DH>RQ>His was not the first, and won't be the last!!! You should have
|
|||
|
|
>DH> >seen the look on MY face while I was running it! I was 20' away
|
|||
|
|
>DH> >and under cover and the sparks looked like they were going to
|
|||
|
|
>DH> >wipe my nose for me.
|
|||
|
|
|
|||
|
|
BC>I am a rank beginner, but have some good background education in
|
|||
|
|
>electronics/electricity... Can you help me get started?
|
|||
|
|
>I want to build a large Tesla coil. I'm also interested in Van de
|
|||
|
|
Graaf
|
|||
|
|
>generators etc. I don't want to build something puny! I like the idea
|
|||
|
|
>of building with refrigeration coil type copper tubing - that sounds
|
|||
|
|
>like serious high power. I've built my own linear amplifier before
|
|||
|
|
>(not a kit!!) I'm watching the posts from you and Richard with great
|
|||
|
|
>interest!
|
|||
|
|
|
|||
|
|
|
|||
|
|
Hi Brian - best thing to do would be to jump right in! I hadn't touched
|
|||
|
|
the stuff myself since high school but Richard's info is really clear and
|
|||
|
|
his video tape is well worth getting.
|
|||
|
|
|
|||
|
|
The 6" dia / 30" long coil that my friends and I are building should be
|
|||
|
|
capable of a 5' arc so although this doesn't quite qualify as "large" it
|
|||
|
|
should be enough to make the neighbors *really* start to wonder about me
|
|||
|
|
( not that they don't already )
|
|||
|
|
|
|||
|
|
There is a basic "learning curve" that needs to be accomplished and I
|
|||
|
|
think that it would be best to do this on a medium sized coil such as
|
|||
|
|
the one we are building - then progress to a monster <grin>
|
|||
|
|
|
|||
|
|
Also, the really large coils need a really large source of high voltage
|
|||
|
|
to power them ( power company distribution transformer ) and they are
|
|||
|
|
very very loud - I think that Richard's 10" dia coil is about the upper
|
|||
|
|
limit to home built coils ( it throws 10 to 15 foot arcs )
|
|||
|
|
|
|||
|
|
I was also into Van de Graaf generators too in high school - used cake
|
|||
|
|
pans for the dome and was able to get 4" sparks on a dry day. Didn't
|
|||
|
|
have access to the tools to make a spun aluminum dome so the rolled
|
|||
|
|
edges of the pans were the upper limiting factor for voltage.
|
|||
|
|
Anyway, save all of the posts and send away for the video, get some
|
|||
|
|
thin-wall PVC tubing and a couple thousand feet of magnet wire, some
|
|||
|
|
neon-sign transformers, make one of the capacitors detailed in an
|
|||
|
|
earlier post and fire away!
|
|||
|
|
|
|||
|
|
TTYL - Dave
|
|||
|
|
|
|||
|
|
b QMPro 1.51 b "Bother", said Pooh, and deleted his message
|
|||
|
|
base...
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- WM v3.10/92-0434
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1654 Date: 12-07-93 11:36
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: James Woodruff
|
|||
|
|
Subj: Re: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
JW> DH> I can well imagine - I also did PA systems for bands for a
|
|||
|
|
>while and some of the perceptions about power and signal
|
|||
|
|
>grounds were amazing.
|
|||
|
|
|
|||
|
|
JW> DH> Not so much for their blind ignorance and lack of common
|
|||
|
|
> DH> sense but for the fact that some of them were still alive <grin>
|
|||
|
|
|
|||
|
|
JW> My church does not ground their amps. Is this to prevent ground
|
|||
|
|
> loops, save the expense of an extra wire,or blind ignorance? This
|
|||
|
|
> Is on their mobile equipment that they clip onto the service
|
|||
|
|
entry
|
|||
|
|
> panel.They also hook hook their stage lights to the same ungroun-
|
|||
|
|
ded
|
|||
|
|
> circuit. p r e t t y scary uh?
|
|||
|
|
|
|||
|
|
Actually, if they are making a three wire connection directly to the
|
|||
|
|
service panel, they should be OK. You might want to get an outlet
|
|||
|
|
tester from your local radio shack or hardware store and verify a proper
|
|||
|
|
connection. These testers are three-prong plugs with three lights in
|
|||
|
|
them. The way the lights light up show how the socket is wired.
|
|||
|
|
|
|||
|
|
If they are just using two wires to power a mobile electronic setup,
|
|||
|
|
they could be letting themselves in for quite a liability suit when a
|
|||
|
|
performer touches something in contact with the earth at the same time
|
|||
|
|
they are in contact with a metal part of the sound system.
|
|||
|
|
|
|||
|
|
A band I used to do sound for had such a bad wiring setup that the
|
|||
|
|
guitar player could not get close to the microphone for fear of getting
|
|||
|
|
shocked. They took it with a grain of salt but we are dealing with
|
|||
|
|
a potentially lethal situation here. The first thing I did was to get
|
|||
|
|
their electrical system in order - no more shocks!
|
|||
|
|
|
|||
|
|
It would be a very good idea to look into this - good luck! Dave
|
|||
|
|
|
|||
|
|
b QMPro 1.51 b "Call waiting", great if you HAVE two friends...
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- WM v3.10/92-0434
|
|||
|
|
! Origin: Advanced Software Concepts-WC3.90P-15.8,301-794-6496
|
|||
|
|
(1:109/546)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 07 Dec 93 17:20:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Lyle
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
I thought I would take a minute and expand a little more on the
|
|||
|
|
subject of harmonics in Tesla systems. This should give you a
|
|||
|
|
better idea of how these harmonics can be used, and help me to
|
|||
|
|
better organize my thoughts on this very interesting subject.
|
|||
|
|
|
|||
|
|
I talked yesterday about theory. Today I would like to discuss a
|
|||
|
|
little more practical application. Let me look at a system that I
|
|||
|
|
have actually built and fired.
|
|||
|
|
|
|||
|
|
I have a normal Tesla secondary that resonates at about 200 kHz
|
|||
|
|
with a discharge ternminal. When this coil is placed in a primary
|
|||
|
|
and critically coupled, it will fire when the tank circuit is
|
|||
|
|
tuned to 200 kHz. No problems here, this is a normal 1/4 wave
|
|||
|
|
system. The tank circuit oscillates at 200 kHz, the secondary
|
|||
|
|
coil with discharger resonates at 200 kHz, and the output from
|
|||
|
|
the system is the 1/4 wave peak of a 200 kHz signal.
|
|||
|
|
|
|||
|
|
Now we remove the secondary from the primary and replace the
|
|||
|
|
secondary with a coil that is 1/4 wave resonate at 400 kHz.
|
|||
|
|
Take a heavy wire or pipe from the top of the 400 kHz coil and
|
|||
|
|
make a connection to the bottom of the 200 kHz coil, now placed
|
|||
|
|
some distance away. Leave the tank circuit alone.
|
|||
|
|
|
|||
|
|
When we fire the system, the secondary (or "driver" coil) is
|
|||
|
|
still excited by, and resonating at, 200 kHz. The frequency of
|
|||
|
|
the system has not changed. What has changed is the output of the
|
|||
|
|
driver coil: It is no longer a 1/4 wave peak at 200 kHz, nor is
|
|||
|
|
it a 1/4 wave peak at 400 kHz (the natural 1/4 wave resonate
|
|||
|
|
freq. of this coil) it is 1/8 wave CURRENT at 200 kHz which
|
|||
|
|
contains significant voltage. The frequency of the system has not
|
|||
|
|
changed, nor has the natural frequency of any coil in the system.
|
|||
|
|
|
|||
|
|
What we have done is forced a shift in a 400 kHz 1/4 wave output
|
|||
|
|
coil to a lower harmonic. In this case the coil is quite able to
|
|||
|
|
resonate for 1/8th wave current output at 200 kHz. The natural
|
|||
|
|
frequency of the coil does not change, nor does the tuned fre-
|
|||
|
|
quency of the system change. The 200 kHz 1/4 wave coil at the end
|
|||
|
|
of the system recieves high current 1/8th wave signal at 200 kHz.
|
|||
|
|
|
|||
|
|
Now we have set up a system that opens up many opportunities for
|
|||
|
|
specialization and improvement. First thing that will be noticed
|
|||
|
|
is that the transmission line is highly energized but runs at a
|
|||
|
|
fairly low voltage by Tesla standards. We have removed the high
|
|||
|
|
voltage 1/4 wave peak from the secondary in the system, and the
|
|||
|
|
1/4 wave peak is now located on the discharge terminal of the end
|
|||
|
|
resonator (the 200 kHz 1/4 wave "extra" coil).
|
|||
|
|
|
|||
|
|
Simply removing the 1/4 wave peak from the top of the secondary
|
|||
|
|
has really reduced the stress on the system and allows for
|
|||
|
|
substantial increases in throughput. One of the most important
|
|||
|
|
factors here is that the 1/4 wave resonator (the extra coil) is
|
|||
|
|
allowed unrestricted VSWR. In a normal 1/4 wave system, with the
|
|||
|
|
1/4 wave peak located on top of the secondary, the VSWR in the
|
|||
|
|
1/4 wave coil is restricted by the field flux interaction between
|
|||
|
|
the primary and secondary. This field flux damps some of the VSWR
|
|||
|
|
resonance. Now the resonator is able to "ring" freely, without
|
|||
|
|
magnetic interferance.
|
|||
|
|
|
|||
|
|
The secondary in the system (driver coil) is still damped by
|
|||
|
|
field flux, but we are no longer looking to this coil to perform
|
|||
|
|
substantial VSWR voltage gains. What we want from this coil is
|
|||
|
|
heavy 1/8th wave current. We are more than happy to get a simple
|
|||
|
|
ratio of turns transformation from this coil, but as it turns out
|
|||
|
|
we do get a significant VSWR voltage rise even on a coil forced
|
|||
|
|
into 1/8th wave resonance. However since we want current and not
|
|||
|
|
high voltage, we can couple this coil much much tighter to the
|
|||
|
|
primary. Increases in coupling coefficients by a factor of four
|
|||
|
|
may not be out of line in primary/secondary drivers fired under
|
|||
|
|
oil. Even in air, coupling coefficients may be doubled or even
|
|||
|
|
tripled. We may also use much heavier wire for higher Qs.
|
|||
|
|
|
|||
|
|
As coupling coefficients (magnetic interaction between coils) are
|
|||
|
|
increased, energy transfer is increased. All of the sudden you
|
|||
|
|
can squeeze in nearly twice as much power, without drawing a
|
|||
|
|
single additional watt. In a normal 1/4 wave system, increasing
|
|||
|
|
the coupling would force a destructive breakdown of the 1/4 wave
|
|||
|
|
secondary, as all energy must be processed by the single
|
|||
|
|
resonator. But, with an extra coil, and an 1/8th wave driver,
|
|||
|
|
stress in the system is greatly reduced. The driver hands off
|
|||
|
|
current to the extra coil as fast as energy is pumped in from the
|
|||
|
|
primary, there is no high voltage 1/4 wave "pressure point" on
|
|||
|
|
top of the driver coil to stress the windings, and the VSWR is
|
|||
|
|
divided between two coils, not burdened on a single secondary.
|
|||
|
|
|
|||
|
|
Another gain is realized by the fact that the output of the 1/8
|
|||
|
|
wave resonating driver contains 20% greater energies than a 1/4
|
|||
|
|
wave output. Why? Well the total energy in a wave form at any
|
|||
|
|
given point is a product of current and voltage. The 1/4 wave
|
|||
|
|
output has voltage, but theoretically has 0 current, as it is a
|
|||
|
|
peak on the wave form. The 1/8 wave harmonic however has voltage
|
|||
|
|
and current both, and both are porportionally at their highest
|
|||
|
|
value. In other words the 1/8 wave point is the location of the
|
|||
|
|
greatest energy available anywhere on the wave form. Here you
|
|||
|
|
find the highest value of voltage * current. It works out to 70%
|
|||
|
|
of the wave energy as opposed to 50% available at the 1/4 wave
|
|||
|
|
peak.
|
|||
|
|
|
|||
|
|
So lets look again at what we have gained. Greater coupling
|
|||
|
|
between the primary and secondary for more efficent throughput.
|
|||
|
|
Higher VSWR in the 1/4 wave resonator (extra coil) by removing
|
|||
|
|
this coil from the damping effects of the magnetic field flux.
|
|||
|
|
Higher energy transfer between the driver and extra coil by using
|
|||
|
|
1/8th wave current in the transmission line. These gains are
|
|||
|
|
easily realized before specific modifications are made to the
|
|||
|
|
tank circuit and coils to take advantage of the setup. Improve-
|
|||
|
|
ments can include higher break rates for more frequent excit-
|
|||
|
|
ation; heavier wire, higher Q coils; higher input voltages;
|
|||
|
|
and balanced capacitor tank circuits.
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1649 Date: 12-07-93 21:50
|
|||
|
|
From: Terry Smith
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> the drugstore. The only thing required was 56 hours of time in
|
|||
|
|
RQ> arranging the plates according to Bill. But he did end up with
|
|||
|
|
RQ> .03 uf 15 kv pulse capacitor in a five gallon bucket. It was
|
|||
|
|
RQ> quite a performer on his coil at 3600 watts!
|
|||
|
|
|
|||
|
|
RQ> The novice coiler should think about the capacitor requirements
|
|||
|
|
RQ> and experiment some before beginning large scale homemade caps.
|
|||
|
|
|
|||
|
|
Why not use a G3 mica or, for more current, a vacuum cap? With the
|
|||
|
|
time value and instability of what you're describing, it sounds like
|
|||
|
|
a couple hundred $$$ for a readily available commercial cap would be
|
|||
|
|
a good comparative value.
|
|||
|
|
|
|||
|
|
What is the design ESR goal?
|
|||
|
|
|
|||
|
|
Terry
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- Maximus 2.01wb
|
|||
|
|
! Origin: Methylene Chloride: Melts your CPU, & your hand!
|
|||
|
|
(1:141/1275)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1701 Date: 12-08-93 07:46
|
|||
|
|
From: Brian Carling
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
DH>BC>DH>My friends and I have arrived on a basic design - 6" diameter
|
|||
|
|
DH> >DH>and 30" long, fixed spark gap, 12kV neon sign transformer and
|
|||
|
|
DH> >DH>homemade
|
|||
|
|
|
|||
|
|
DH>RQ>Richard T. Quick II, 10028 Manchester Rd., Suite 253, Glendale,
|
|||
|
|
DH> >Missouri, 63122, USA
|
|||
|
|
|
|||
|
|
thanks for the info. I am going to see what I can find at the
|
|||
|
|
local library also.
|
|||
|
|
|
|||
|
|
DH>You could scale down the design but I feel that the amount of time and
|
|||
|
|
DH>money involved would be about the same regardless of what size coil
|
|||
|
|
you
|
|||
|
|
DH>are building so why not go for a bigger one.
|
|||
|
|
|
|||
|
|
No, I want to build the BIG one!
|
|||
|
|
|
|||
|
|
DH>The one I am building is 6" diameter, 30" tall and is powered by a
|
|||
|
|
bank
|
|||
|
|
DH>of four neon sign transformers.
|
|||
|
|
|
|||
|
|
That doesn't sound too huge to construct...
|
|||
|
|
|
|||
|
|
Do you connect the neon sign transformers in series or what?
|
|||
|
|
|
|||
|
|
DH>Richard says that a coil like this will be capable of consistent five
|
|||
|
|
DH>foot long arcs.
|
|||
|
|
|
|||
|
|
Cool!
|
|||
|
|
|
|||
|
|
DH>Down the road, I would like to experiment with a "pocket" coil or a
|
|||
|
|
DH>tabletop model but you do need a very very good ground regardless of
|
|||
|
|
the
|
|||
|
|
DH>size so this isn't something that you could take somewhere and
|
|||
|
|
casually
|
|||
|
|
DH>set it up and expect to get good results.
|
|||
|
|
|
|||
|
|
Why can't the one you describe be a "table-top" model?
|
|||
|
|
6" around by 30" tall would fit on most tables!
|
|||
|
|
|
|||
|
|
DH>Anyway, keep tuned to this conference and I will be letting people
|
|||
|
|
know
|
|||
|
|
DH>how things are progressing!
|
|||
|
|
|
|||
|
|
I'll watch eagerly!
|
|||
|
|
|
|||
|
|
|
|||
|
|
DH>--- WM v3.10/92-0434
|
|||
|
|
DH> ! Origin: Advanced Software
|
|||
|
|
Concepts-WC3.90P-15.8,301-794-6496 (1:109/546)
|
|||
|
|
|
|||
|
|
* SLMR 2.1a * Environmental activists: Green on the outside/RED
|
|||
|
|
inside!
|
|||
|
|
|
|||
|
|
-!- Maximus/2 2.01wb
|
|||
|
|
! Origin: _The_Attic_ [301-428-1970] 14.4K v.32b - (1:109/423)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2418 Date: 12-08-93 16:34
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Thank you Dave for sending the magazine with the article on the
|
|||
|
|
spark gap transmitters. It was interesting, but full of mis-
|
|||
|
|
crediting. The author chose in many instances to detail the worst
|
|||
|
|
systems of the era.
|
|||
|
|
|
|||
|
|
Research, patents, articles, legal trials, and public demonstra-
|
|||
|
|
tions produced by Nikola Tesla show conclusively that he was much
|
|||
|
|
more advanced in wireless transmission, yet the article reads
|
|||
|
|
"Marconi this... Marconi that... Marconi's work showed..."
|
|||
|
|
|
|||
|
|
The circuits, schematics, and techniques shown in the article are
|
|||
|
|
quite primitive when compared to the circuits Tesla was using
|
|||
|
|
two, even three, years earlier. Processing efficiencies of energy
|
|||
|
|
in the circuits detailed in the article could only be considered
|
|||
|
|
poor at best.
|
|||
|
|
|
|||
|
|
Tesla shows circuits published in 1891 that produce continuous
|
|||
|
|
wave undamped oscillations. The circuits are efficient, powerful,
|
|||
|
|
and frequency stable (no damping, drifting, or beating). Tesla's
|
|||
|
|
spark gap transmitters of a few years later were ranged by the
|
|||
|
|
U.S. Navy at over 1500 miles with 2.5 kVA input. His maritime
|
|||
|
|
transmitter design was commercialized by Fritz Lowenstein (I
|
|||
|
|
believe), and was a full head and shoulders above the units
|
|||
|
|
designed by people like Thompson and Marconi.
|
|||
|
|
|
|||
|
|
The photos of the damped wave trains were very interesting. The
|
|||
|
|
author mentioned that the photos were made with reproduction
|
|||
|
|
equipment that resembled units of the era as closely as posible.
|
|||
|
|
I just find it galling that he would go through such efforts in
|
|||
|
|
accuracy this area and would only mention Tesla's name once.
|
|||
|
|
|
|||
|
|
It was also interesting to note that the large 300 kVa Marconi
|
|||
|
|
transmitter discussed in the article was retrofitted once, and
|
|||
|
|
decommissioned early because the output was so highly damped.
|
|||
|
|
Looking at the material I can only imagine the nightmare of
|
|||
|
|
maintaining a sharp tune in the system, and the related problems
|
|||
|
|
with frequency drift and efficiency. Many of these problems are
|
|||
|
|
related to the poor gap design and lack of primary inductance.
|
|||
|
|
The gaps would not quench well at these power levels, and the
|
|||
|
|
short primary conductor does not provide sharp tune, good
|
|||
|
|
coupling coefficients or energy transfers. Tesla's systems of
|
|||
|
|
this era were much much more advanced.
|
|||
|
|
|
|||
|
|
It has been documented in the U.S. Supreme court that Marconi
|
|||
|
|
stole a number of patents from Tesla relating to Tesla's early
|
|||
|
|
wireless work. The two men were in contact for nearly a year
|
|||
|
|
prior to 1890, during which time Marconi had substantial access
|
|||
|
|
to Tesla's ideas. When Tesla realized the theft of his unper-
|
|||
|
|
fected systems was becomming prevalent, he came to despise
|
|||
|
|
Marconi and cut him off of any new information. Afterwards
|
|||
|
|
Marconi was stuck for a number of years in his efforts to develop
|
|||
|
|
a powerful working transmitter, at least until he was able to
|
|||
|
|
steal Tesla's published patents for the coupled secondary/
|
|||
|
|
antenna. Tesla by this time had raced ahead by leaps and bounds
|
|||
|
|
to the prototype development of the Magnifing Transmitter in the
|
|||
|
|
mid 1890s, while Marconi was still using primitive gaps and
|
|||
|
|
poorly coupled, short primaries for years. Tesla's Magnifing
|
|||
|
|
Transmitter was remarkably frequency stable, narrow band,
|
|||
|
|
continuous wave, and extremely powerful and efficient. Yet he,
|
|||
|
|
and credit for his work, has all but been deleted from main
|
|||
|
|
stream history.
|
|||
|
|
|
|||
|
|
I can go on and on. Tesla was using high frequency alternators
|
|||
|
|
running 20,000 hz or more for his power supplies (patented) in
|
|||
|
|
his transmitters of this era, yet the article details the use of
|
|||
|
|
500 hz alternators by Marconi. The result: Marconi's damped wave
|
|||
|
|
transmitter ran maximum synchronous break rates around 1000 BPS,
|
|||
|
|
(breaks per second) while Tesla went asynchronous to 40,000 or
|
|||
|
|
even 50,000 BPS and was able to achieve nearly undamped CW
|
|||
|
|
output. Marconi's machines were plagued with a heavily damped
|
|||
|
|
signal, short range, reception problems, high input powers, and
|
|||
|
|
very poor efficiency. The article noted that later; others went
|
|||
|
|
to high speed asynchronous breaks, but they lacked the oscillator
|
|||
|
|
circuits Tesla was running, and the sophisticated 1/8th wave
|
|||
|
|
driver system (Magnifing Transmitter) to utilize these extremely
|
|||
|
|
high break rates. When others tried running asynchronous breaks
|
|||
|
|
with extremely high BPS on 1/4 wave drivers, the performance fell
|
|||
|
|
off to near zero, and they called Tesla a liar. Indeed, Tesla was
|
|||
|
|
so far ahead with the system that NOBODY EVEN UNDERSTOOD THE
|
|||
|
|
CIRCUITS HE WAS USING UNTIL THE MID 1980s!!!!
|
|||
|
|
That is over 90 years later, not a mistype.
|
|||
|
|
|
|||
|
|
Credit given to his less creative competition, men like Edison
|
|||
|
|
and Marconi, is wrongful, and not based in historic fact. Both
|
|||
|
|
Edison and Marconi advocated systems that failed the test of time
|
|||
|
|
and practicality, to be replaced with systems invented by the
|
|||
|
|
master, Nickola Tesla. Tesla's most advanced systems went
|
|||
|
|
unutilized completely, unless they have been incorporated into
|
|||
|
|
classified SDI projects for particle beam devices. I have seen
|
|||
|
|
this over and over. In Chicago last weekend at the Museum of
|
|||
|
|
Science and Industry; Edison gets a full sectional display,
|
|||
|
|
complete with an orignal model DC generator. DC power generation
|
|||
|
|
and transmission on industrial scales is dead in all but highly
|
|||
|
|
specific applications. Yet Tesla, the inventor of the modern AC
|
|||
|
|
industrial power grid gets not a word. The only mention of
|
|||
|
|
Tesla's name I could find was on a single "classic" coil on loan
|
|||
|
|
from the University of Chicago.
|
|||
|
|
|
|||
|
|
BTW, the section in the article on the Wien quench gap manu-
|
|||
|
|
factured and used in transmitters by Telefunken, exactly
|
|||
|
|
corresponds to my post of over a month ago in this conference.
|
|||
|
|
Tesla was paid royalty by Telefunken on every transmitter
|
|||
|
|
produced until the start of WWI. These transmitters were on board
|
|||
|
|
every German U-boat, and Tesla's system was used on large land
|
|||
|
|
based transmitters used by the German command. Tesla offered
|
|||
|
|
these patents to the U.S. military several times, but was turned
|
|||
|
|
down. Needing money he sold them to the highest bidder, and the
|
|||
|
|
Germans praised them highly.
|
|||
|
|
|
|||
|
|
The U.S. Navy bought Tesla transmitters prior to WWI from an
|
|||
|
|
intermediary company run by Fritz Lowenstein. Herr Lowenstein was
|
|||
|
|
a highly praised assistant to Tesla in New York and Colorado
|
|||
|
|
Springs. The patents as I have said were owned by German
|
|||
|
|
nationals, but Mr. Lowenstein had the technical expertise to see
|
|||
|
|
that they were properly manufactured and tuned. Tesla, as I have
|
|||
|
|
mentioned before, was notorious for not detailing important
|
|||
|
|
"tricks of the trade" in his patent applications; especially
|
|||
|
|
after his experience with Marconi and others. Having worked
|
|||
|
|
closely with Tesla, Lowenstein sought commercial applications
|
|||
|
|
from systems he felt were sufficiently perfected, though Tesla
|
|||
|
|
saw the Magnifier as the system to bring to industrial power
|
|||
|
|
levels.
|
|||
|
|
|
|||
|
|
I want to thank you for sending the article. I enjoyed readng it
|
|||
|
|
nearly as much as I enjoyed tearing it to pieces. If you run
|
|||
|
|
across similar material please post me.
|
|||
|
|
|
|||
|
|
I have copied my archives from this thread, including much
|
|||
|
|
material you may have missed, onto the disk you sent me. I am
|
|||
|
|
also going to copy the article from the magizine you sent, and I
|
|||
|
|
will return both shortly. I have had a very busy week, what with
|
|||
|
|
a weekend to Chicago, and a new girlfriend, so I am running a
|
|||
|
|
little behind. I still have not unpacked my suitcase.
|
|||
|
|
|
|||
|
|
You should get your material returned around the time you get
|
|||
|
|
this post or shortly after.
|
|||
|
|
|
|||
|
|
Thank you again for thinking of me.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1692 Date: 12-09-93 08:42
|
|||
|
|
From: Terry Smith
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> By reading the Colorado Springs Notes it is quite clear that
|
|||
|
|
RQ> Tesla struggled to get a good ground on site for his system and
|
|||
|
|
RQ> cited the local geology (sand & rock) as the source of his
|
|||
|
|
RQ> problem. He eventually had to run water 24 hours a day over his
|
|||
|
|
RQ> ground.
|
|||
|
|
|
|||
|
|
RQ> He used a two ground system in his CS lab, and documents the
|
|||
|
|
RQ> resistance, and electrical distance between the two. The system
|
|||
|
|
RQ> ground was a 3' square copper plate dropped in the bottom of a
|
|||
|
|
RQ> 12' hole with a couple of wheelbarrows of coke dumped on top.
|
|||
|
|
RQ> The hole was backfilled and watered as I mentioned.
|
|||
|
|
|
|||
|
|
You'll find that some broadcasters in areas with problem soil use
|
|||
|
|
multiple 30' long 'salt' paste filled chemical ground devices near
|
|||
|
|
a tower base. In Florida, where serious lightning strikes are a
|
|||
|
|
problem, I've heard reports of the sand being melted, forming an
|
|||
|
|
insulating layer over such devices.
|
|||
|
|
|
|||
|
|
An AM antenna system may have 2 to 20 miles of #10 bare copper wire,
|
|||
|
|
plus a large quantity of 4" strap, and expanded mesh copper screens,
|
|||
|
|
for grounding.
|
|||
|
|
|
|||
|
|
That's several hundred pounds of Cu for a small system, and several
|
|||
|
|
thousand for a large one, aver an area of acres. This is done even
|
|||
|
|
on a wet site.
|
|||
|
|
|
|||
|
|
Terry
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!- Maximus 2.01wb
|
|||
|
|
! Origin: Methylene Chloride: Melts your CPU, & your hand!
|
|||
|
|
(1:141/1275)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1599 Date: 12-09-93 11:03
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
I have spent a few hours and archived all of the posts from this
|
|||
|
|
thread. I have had several people ask repeat questions, and
|
|||
|
|
others inform me that feed problems have caused them to miss some
|
|||
|
|
material.
|
|||
|
|
|
|||
|
|
If you are interested in getting a complete and up to date
|
|||
|
|
archive of all of this material, please mail me a floppy and a
|
|||
|
|
SASE. I will be happy to send you my archives free of charge.
|
|||
|
|
|
|||
|
|
Richard T. Quick II
|
|||
|
|
10028 Manchester Rd.
|
|||
|
|
Suite 253
|
|||
|
|
Glendale, MO 63122
|
|||
|
|
USA
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1600 Date: 12-09-93 15:01
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
Dave,
|
|||
|
|
|
|||
|
|
I shot the magazine back to you in the mail today after I made
|
|||
|
|
copies. I returned the disk you sent with it. On the disk I
|
|||
|
|
copied my archives from this thread, and you will find a personal
|
|||
|
|
letter.
|
|||
|
|
|
|||
|
|
I am sorry that the archives are a little disorganized, but the
|
|||
|
|
posts were saved from two machines, and so there is some
|
|||
|
|
duplication. Everything of importance from about 10/5/93 is on
|
|||
|
|
the disk, though it may be scattered among several files.
|
|||
|
|
|
|||
|
|
Everything including your letter are in standard DOS text.
|
|||
|
|
|
|||
|
|
Look forward to seeing some video/photos of your coiling work
|
|||
|
|
soon. BTW did you really decide to lengthen the 6" coil form from
|
|||
|
|
24" to 30" in height? I would think this would require more than
|
|||
|
|
the 1500' of magnet wire you had earmarked for this project.
|
|||
|
|
|
|||
|
|
I was just curious.
|
|||
|
|
|
|||
|
|
Also, I am seeing posts that you have quoted from others, but I
|
|||
|
|
am not seeing the original posts here....
|
|||
|
|
|
|||
|
|
This looks to be a network problem, unless these people are
|
|||
|
|
posting to you locally.... I wonder what is going on.
|
|||
|
|
|
|||
|
|
I sent you a post last week mentioning that I saw you had made a
|
|||
|
|
local logon here to the SLUG BBS, we narrowly missed a chat. How
|
|||
|
|
long have you been calling locally? If you get the chance since
|
|||
|
|
it appears you have a high speed modem you can grab the thread
|
|||
|
|
here if you have any network problems. This board has nearly all
|
|||
|
|
of my original posts in this conference still available.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2509 Date: 12-10-93 16:15
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Terry Smith
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> SEZ Terry Smith to Richard Quick <=-
|
|||
|
|
|
|||
|
|
RQ> the drugstore. The only thing required was 56 hours of time
|
|||
|
|
RQ> in arranging the plates according to Bill. But he did end up
|
|||
|
|
RQ> with .03 uf 15 kv pulse capacitor in a five gallon bucket.
|
|||
|
|
RQ> It was quite a performer on his coil at 3600 watts!
|
|||
|
|
|
|||
|
|
RQ> The novice coiler should think about the capacitor
|
|||
|
|
RQ> requirements and experiment some before beginning large
|
|||
|
|
RQ> scale homemade caps.
|
|||
|
|
|
|||
|
|
TS> Why not use a G3 mica or, for more current, a vacuum cap?
|
|||
|
|
|
|||
|
|
Mica is not as good for homemade caps as poly, they are lossy,
|
|||
|
|
and they get hot. Poly has a lower RF dissapation factor, is
|
|||
|
|
cheaper, and easier to obtain. Commerical mica caps that are
|
|||
|
|
found surplus may be used, but they are not as high Q as poly.
|
|||
|
|
|
|||
|
|
Not many amateurs are running the vacuum systems or have the
|
|||
|
|
equipment and design skills to produce homemade vacuum caps. I
|
|||
|
|
have priced commercial units surplus, and would not find much use
|
|||
|
|
for a vacuum cap unless it was perhaps employed as a tuning cap
|
|||
|
|
on a small magnifier.
|
|||
|
|
|
|||
|
|
TS> With the time value and instability of what you're
|
|||
|
|
TS> describing, it sounds like a couple hundred $$$ for a
|
|||
|
|
TS> readily available commercial cap would be a good comparative
|
|||
|
|
TS> value.
|
|||
|
|
|
|||
|
|
Not for a simple hobbiest. Most coilers are looking for cost
|
|||
|
|
effective and flexible designs. They would rather put in the time
|
|||
|
|
stacking or rolling to build a cap cheaply, than send a check to
|
|||
|
|
the cap company for a custom commercial unit. After you have a
|
|||
|
|
few coils under your belt, and you can design systems that you
|
|||
|
|
know are going to require such and such values, you then start to
|
|||
|
|
look to a commercial unit to reduce size, increase efficiency,
|
|||
|
|
and reduce costs. This is more often true than not in large
|
|||
|
|
systems that grow from the work done with homemade or salvaged
|
|||
|
|
caps.
|
|||
|
|
|
|||
|
|
60% of the capacitance in my lab is homemade. Now if I added the
|
|||
|
|
total value of this capacitance against the cost of a single
|
|||
|
|
commercial unit, a commercial unit would be more cost effective,
|
|||
|
|
and this does not even include the time invested. But my homemade
|
|||
|
|
caps consist of 14 individual units. The number of units gives me
|
|||
|
|
voltage and value flexibility not available in one or two
|
|||
|
|
commercial units. To reproduce my homemade array in 14 commercial
|
|||
|
|
units would not be cost effective.
|
|||
|
|
|
|||
|
|
Since I started small, I went homemade. As my work grew, so did
|
|||
|
|
my homemade capacitors. I already had most of the materials, had
|
|||
|
|
aquired the design and construction skills, and could increase my
|
|||
|
|
power levels with a couple days work building a few more caps.
|
|||
|
|
When I decided to go to the pole pig, I shopped for commercial
|
|||
|
|
caps to drive the system. I knew exactly the voltage rating that
|
|||
|
|
would be required, and the value I was going to need. Not paper
|
|||
|
|
values mind you: I had set the system up with homemade caps and
|
|||
|
|
juggled the system around to find the tune spots I wanted to hit.
|
|||
|
|
The bill on my two .05 uf 45kvac pulse caps came to $600.00, and
|
|||
|
|
I had to wait nearly two months for deliverly once I knew exactly
|
|||
|
|
what I needed.
|
|||
|
|
|
|||
|
|
The bottom line on homemade caps is that they are cheap, built
|
|||
|
|
out of readily available materials, and offer high Qs. The
|
|||
|
|
instabilities are 90% resultant of poor techniques in
|
|||
|
|
construction or operation, such as dirty plates and dielectrics,
|
|||
|
|
trapped air, improper break-in of a newly constructed unit, or
|
|||
|
|
running with the gaps set to wide. Every failure I have
|
|||
|
|
experienced resulted from one of the above. Since the unit was
|
|||
|
|
homemade, I was able to repair the cap and return it to service.
|
|||
|
|
Built with cleanliness and durability in mind, homemade caps will
|
|||
|
|
work quite hard for a long time. It has been nearly a year since
|
|||
|
|
I have had any problems with a homemade unit. The designs I have
|
|||
|
|
mentioned work, give great spark, and are not too expensive to
|
|||
|
|
make for the beginner. If you want to pay $$$ for commercial
|
|||
|
|
units to experiment with, please feel free, the commerical units
|
|||
|
|
are quite good.
|
|||
|
|
|
|||
|
|
Down the road a bit I will post the addresses of a couple of
|
|||
|
|
commerical manufacturers I have dealt with. Both of these
|
|||
|
|
companies have a $150.00 minimum order with a 6-8 week delivery
|
|||
|
|
wait.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2628 Date: 12-10-93 23:51
|
|||
|
|
From: Dave Lyle
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10Kva Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> I have a normal Tesla secondary that resonates at about 200
|
|||
|
|
RQ> kHz with a discharge ternminal. When this coil is placed in a
|
|||
|
|
RQ> primary and critically coupled, it will fire when the tank
|
|||
|
|
RQ> circuit is tuned to 200 kHz. No problems here, this is a
|
|||
|
|
RQ> normal 1/4 wave system. The tank circuit oscillates at 200
|
|||
|
|
RQ> kHz, the secondary coil with discharger resonates at 200 kHz,
|
|||
|
|
RQ> and the output from the system is the 1/4 wave peak of a 200
|
|||
|
|
RQ> kHz signal.
|
|||
|
|
|
|||
|
|
RQ> Now we remove the secondary from the primary and replace the
|
|||
|
|
RQ> secondary with a coil that is 1/4 wave resonate at 400 kHz.
|
|||
|
|
|
|||
|
|
Hi Richard,
|
|||
|
|
|
|||
|
|
I was actually wondering what would be the effect of going the
|
|||
|
|
opposite way.
|
|||
|
|
|
|||
|
|
What if you removed the _primary_ and replaced it with one that
|
|||
|
|
resonated at 600 Khz. Now the secondary would be resonate
|
|||
|
|
at 3/4 wave, and the voltage/current distribution would be:
|
|||
|
|
|
|||
|
|
At the base.........................Current peak, Voltage null
|
|||
|
|
At the 1/4 wave point
|
|||
|
|
(1/3 of the way up the coil).....Voltage peak, Current null
|
|||
|
|
At the 1/2 wave point
|
|||
|
|
(2/3 of the way up the coil).....Current peak, Voltage null
|
|||
|
|
At the 3/4 wave point
|
|||
|
|
(Top of coil)...................Voltage peak, Current null
|
|||
|
|
|
|||
|
|
I suppose you would have trouble preventing a breakdown at the
|
|||
|
|
1/4 wave (1/3 of coil) point, but would there be any advantages
|
|||
|
|
to the higher frequency operation?
|
|||
|
|
|
|||
|
|
Origin: The County Line BBS Node1 414-476-8468 (1:154/100)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 11 Dec 93 01:16:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Terry Smith
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
BTW,
|
|||
|
|
|
|||
|
|
I have several commercial micas that I have experimented with.
|
|||
|
|
The discharge from a coil using commercial micas tends toward a
|
|||
|
|
spindly, violet discharge with very little current behind it.
|
|||
|
|
The run times with these micas is very short, and I have damaged
|
|||
|
|
a commercial mica cap from overheating with very short runs times
|
|||
|
|
at fairly low voltage. The problem with commercial micas is
|
|||
|
|
really a combination of high RF dissipation factors, and the
|
|||
|
|
inability of most commercial micas to effectively pulse
|
|||
|
|
discharge.
|
|||
|
|
|
|||
|
|
The homemade polyethylene caps give much superior performance.
|
|||
|
|
They don't get hot. In fact I have never even gotten a homemade
|
|||
|
|
cap warm. The reason for this is that poly has a very low RF
|
|||
|
|
dissipation factor, and when mineral oil is used as a coolant/
|
|||
|
|
corona supressant there is very low loss, very little dielectric
|
|||
|
|
heating, and what heat does form is sunk to the oil. The spark
|
|||
|
|
from a coil run with poly caps is blue-white, thick, and violent
|
|||
|
|
with a hefty current peak behind it. Nearly all of the modern
|
|||
|
|
commercial caps designed for RF pulse discharging are plastic
|
|||
|
|
film types covered in oil.
|
|||
|
|
|
|||
|
|
The difference between the two capacitor types is vast. Plastic
|
|||
|
|
film caps are much better performers in the Tesla tank circuit.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2035 Date: 12-11-93 18:37
|
|||
|
|
From: Brian Carling
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
DH>Anyway, save all of the posts and send away for the video, get some
|
|||
|
|
DH>thin-wall PVC tubing and a couple thousand feet of magnet wire, some
|
|||
|
|
DH>neon-sign transformers, make one of the capacitors detailed in an
|
|||
|
|
DH>earlier post and fire away!
|
|||
|
|
|
|||
|
|
Yes, unfortunately I missed many of the earlier posts... what is
|
|||
|
|
the capacitor for? What is it like?
|
|||
|
|
|
|||
|
|
* SLMR 2.1a * The "World Series" _ISN'T_ !!
|
|||
|
|
|
|||
|
|
-!- Maximus/2 2.01wb
|
|||
|
|
! Origin: _The_Attic_ [301-428-1970] 14.4K v.32b - (1:109/423)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2647 Date:12-12-93 12:12
|
|||
|
|
From: Robert Taylor
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: Re: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Wanted to drop you a line & see if you got my post about a month
|
|||
|
|
ago on the book that Barnes&Noble has out called *The Inventions,
|
|||
|
|
Research, and Writings of Nikola Tesla*.
|
|||
|
|
|
|||
|
|
Got a new catalog from them the other day & saw that their price
|
|||
|
|
had gone down to about $10. Good book w/ alot of the heavier
|
|||
|
|
technical stuff (including original schematics).
|
|||
|
|
|
|||
|
|
Definately worth a look.
|
|||
|
|
|
|||
|
|
! Origin: BLUFF CITY BBS (1:123/70)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1733 Date: 12-12-93 14:19
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Brian Carling
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
DH>My friends and I have arrived on a basic design - 6" diameter
|
|||
|
|
DH>and 30" long, fixed spark gap, 12kV neon sign transformer.
|
|||
|
|
|
|||
|
|
BC> thanks for the info. I am going to see what I can find at
|
|||
|
|
BC> the local library also.
|
|||
|
|
|
|||
|
|
Don't believe everything you read there, that is if you find
|
|||
|
|
anything at all. Detailed instructions on even the "classical"
|
|||
|
|
design Tesla Coils are as scarce as hens teeth.
|
|||
|
|
|
|||
|
|
DH>You could scale down the design but I feel that the amount of
|
|||
|
|
DH>time and money involved would be about the same regardless of
|
|||
|
|
DH>what size coil you are building so why not go for a bigger
|
|||
|
|
DH>one.
|
|||
|
|
|
|||
|
|
BC> No, I want to build the BIG one!
|
|||
|
|
|
|||
|
|
DH>The one I am building is 6" diameter, 30" tall and is powered
|
|||
|
|
DH>by a bank of four neon sign transformers.
|
|||
|
|
|
|||
|
|
BC> That doesn't sound too huge to construct...
|
|||
|
|
|
|||
|
|
This (as far as I am concerned) is still a small coil. But as I
|
|||
|
|
have said it is just about right for a beginner.
|
|||
|
|
|
|||
|
|
BC> Do you connect the neon sign transformers in series or what?
|
|||
|
|
|
|||
|
|
Neon sign transformers have center tap grounded secondaries
|
|||
|
|
inside the case. You cannot run the seconmdaries in series for
|
|||
|
|
this reason. The secondaries are run in parallel for increased
|
|||
|
|
current output, while the voltage always remains the same. For
|
|||
|
|
instance, four 12 kv, 30 ma neon sign xfrmrs are wired to give 12
|
|||
|
|
kv, 120 ma output.
|
|||
|
|
|
|||
|
|
The primaries may be run in parallel as well, depending on your
|
|||
|
|
line power supply and variac. If you are limited to 120 volts
|
|||
|
|
input then you must run the primaries in parallel for 120 volts.
|
|||
|
|
If you have access to 240 volts lines, then it is best to get a
|
|||
|
|
240 volt variac, and pair up the neon signs xfrmrs by placing two
|
|||
|
|
primaries in series so that 120 volts appears across each primary
|
|||
|
|
winding.
|
|||
|
|
|
|||
|
|
Power factor correction capacitors are especially important if
|
|||
|
|
you are running neons at 120 volts. The amp requirements of four
|
|||
|
|
xfrmrs run at 120 volts without power factor correction can
|
|||
|
|
stress a normal household circuit.
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1734 Date: 12-12-93 14:45
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Terry Smith
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
TS> You'll find that some broadcasters in areas with problem soil
|
|||
|
|
TS> use multiple 30' long 'salt' paste filled chemical ground
|
|||
|
|
TS> devices near a tower base. In Florida, where serious
|
|||
|
|
TS> lightning strikes are a problem, I've heard reports of the
|
|||
|
|
TS> sand being melted, forming an insulating layer over such
|
|||
|
|
TS> devices.
|
|||
|
|
|
|||
|
|
TS> An AM antenna system may have 2 to 20 miles of #10 bare
|
|||
|
|
TS> copper wire, plus a large quantity of 4" strap, and expanded
|
|||
|
|
TS> mesh copper screens, for grounding. That's several hundred
|
|||
|
|
TS> pounds of Cu for a small system, and several thousnd for a
|
|||
|
|
TS> large one, aver an area of acres. This is done even on a wet
|
|||
|
|
TS> site.
|
|||
|
|
|
|||
|
|
I would concur with the practice of using such heavy RF and
|
|||
|
|
lightning grounds. My experience with Tesla systems shows that
|
|||
|
|
there really is no such thing as a grounding system that is too
|
|||
|
|
large. That profession radio systems are using such heavy grounds
|
|||
|
|
does not surprise me. The system needs to have a solid zero
|
|||
|
|
voltage point capable of grounding heavy current in order to
|
|||
|
|
establish a a powerful signal, not to mention protection from
|
|||
|
|
lightning, and for safety of the HV outputs in the transmitter
|
|||
|
|
itself.
|
|||
|
|
|
|||
|
|
Tesla was the first person to have applied ground to a tuned
|
|||
|
|
circuit. He was the first to realize the advantages of heavy
|
|||
|
|
grounding, and the construction of extensive grounding systems.
|
|||
|
|
What is really surprising is the number of people who do not, or
|
|||
|
|
refuse to, appreciate ground requirements for high powered Tesla
|
|||
|
|
and radio equipment.
|
|||
|
|
|
|||
|
|
My large coil featured in the video has equal energy output from
|
|||
|
|
both ends of the coil. While the discharge terminal produces
|
|||
|
|
visible output in 1/4 wave spark with energies of many megawatts
|
|||
|
|
at more than a couple of megavolts; the base wire is literally
|
|||
|
|
flooded with current. I have measured RF currents of over 60 amps
|
|||
|
|
rms with a current transformer in the base wire of this
|
|||
|
|
particular system, and despite the wave theory of zero voltage at
|
|||
|
|
this point, there is considerable voltage. If there is ANY
|
|||
|
|
resistance to this RF current problems begin. The only way to
|
|||
|
|
remove this current and still maintain low potential in the
|
|||
|
|
ground is to use heavier and larger grounding systems.
|
|||
|
|
|
|||
|
|
I have seen heavy coronas, arcing and sparking, intense RFI, and
|
|||
|
|
highly RF energized control circuits in Tesla systems using
|
|||
|
|
inadequate grounds and/or ground paths. This not only affects
|
|||
|
|
coil performance, efficiency, and throughput of the system, it is
|
|||
|
|
also unsafe and unneighborly.
|
|||
|
|
|
|||
|
|
A grounding system as you described would be ideal for high
|
|||
|
|
energy Tesla work.
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 14 Dec 93 12:19:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Lyle
|
|||
|
|
Subj: 10Kva Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>Now we remove the secondary from the primary and replace the
|
|||
|
|
RQ>secondary with a coil that is 1/4 wave resonate at 400 kHz.
|
|||
|
|
|
|||
|
|
DL> I was actually wondering what would be the effect of going
|
|||
|
|
DL> the opposite way.
|
|||
|
|
|
|||
|
|
DL> What if you removed the _primary_ and replaced it with one
|
|||
|
|
DL> that resonated at 600 Khz. Now the secondary would be
|
|||
|
|
DL> resonate at 3/4 wave, and the voltage/current distribution
|
|||
|
|
DL> would be:
|
|||
|
|
|
|||
|
|
> At the base.........................Current peak, Voltage null
|
|||
|
|
> At the 1/4 wave point
|
|||
|
|
> (1/3 of the way up the coil).....Voltage peak, Current null
|
|||
|
|
> At the 1/2 wave point
|
|||
|
|
> (2/3 of the way up the coil).....Current peak, Voltage null
|
|||
|
|
> At the 3/4 wave point
|
|||
|
|
> (Top of coil)...................Voltage peak, Current null
|
|||
|
|
|
|||
|
|
DL> I suppose you would have trouble preventing a breakdown at
|
|||
|
|
DL> the 1/4 wave (1/3 of coil) point,
|
|||
|
|
|
|||
|
|
Trouble would be a mild word for it. The 1/4 wave voltage peak
|
|||
|
|
appearing in the windings would destroy the coil in short order.
|
|||
|
|
RF voltages in these frequencies just don't understand what
|
|||
|
|
"insulation" is. I have not found any practical material or
|
|||
|
|
construction technique that would contain the voltage of a solid
|
|||
|
|
1/4 wave voltage peak that appears in the coil windings. Plate
|
|||
|
|
glass, 1/4" thick polyethylene, etc. are invisible to this
|
|||
|
|
discharge, and the energy passes right through it virually
|
|||
|
|
unimpeded. Mineral oil is the best insulator for this particular
|
|||
|
|
energy, but there is insufficient space between turns on the coil
|
|||
|
|
for sufficient breakdown protection. Even if there was enough
|
|||
|
|
room between turns, then you have problems with the coil form
|
|||
|
|
breaking down.
|
|||
|
|
|
|||
|
|
I have done experiments with coils in which the same basic end
|
|||
|
|
result was achieved by bottom feeding an extra coil with current
|
|||
|
|
that resulted in higher harmonic resonances of the extra coil
|
|||
|
|
(such as the 3/4 wave harmonic you charted above). When the coil
|
|||
|
|
was fired, sparks and corona came flying out of about a dozen
|
|||
|
|
turns in the coil. Those turns where spark and corona appeared
|
|||
|
|
corresponded to the 1/4 wave peak. But there was no way to
|
|||
|
|
contain it. The sparks broke down the windings, scored, then
|
|||
|
|
carbonized the coil form . The coil suffered irrepairable damage
|
|||
|
|
and had to be scrapped. Similar incidents with other systems
|
|||
|
|
where energy densities were high resulted with the spark from 1/4
|
|||
|
|
wave peaks in the winding blowing holes through the coil form.
|
|||
|
|
Again the coil was a complete loss and had to be scrapped.
|
|||
|
|
|
|||
|
|
In addition to the breakdown, the remaining turns further up the
|
|||
|
|
coil had no energy at all to speak of. Why? All the energy in the
|
|||
|
|
system was lost to spark and corona leakage at the 1/4 wave
|
|||
|
|
breakdown point, insufficient energy remained in the coil
|
|||
|
|
windings above the breakdown to do anything.
|
|||
|
|
|
|||
|
|
DL> would there be any advantages to the higher frequency
|
|||
|
|
DL> operation?
|
|||
|
|
|
|||
|
|
None that I can think of. This model represents a very high loss
|
|||
|
|
situation. 1/4 wave voltage peaks represent the final output
|
|||
|
|
point in a coil system. There is no way to process the energy in
|
|||
|
|
wire to any point above 1/4 wave in a single coil without
|
|||
|
|
tremendious losses.
|
|||
|
|
|
|||
|
|
However when you go to two or more coils, where you are working
|
|||
|
|
with more than one output terminal, it is possible to achieve 3/4
|
|||
|
|
wave signal processing. This requires a pair of 1/8 wave driver
|
|||
|
|
coils, two primaries run in series off the same tank ciruit, and
|
|||
|
|
two extra coils. Your outputs from the extra coils are still 1/4
|
|||
|
|
wave with the peaks on the terminals, but taken as a whole the
|
|||
|
|
system does efficiently process a 3/4 wave signal. This system
|
|||
|
|
would be adding up lower harmonics (two 1/8th wave outputs, with
|
|||
|
|
two 1/4 wave outputs) to get to efficient 3/4 wave signal
|
|||
|
|
processing. This system would be unique in that it may not
|
|||
|
|
require a ground, as the two tuned sets of coils could "beat" off
|
|||
|
|
of each other; in other words the nul voltage current output from
|
|||
|
|
the base of one 1/8 wave driver coil could be fed into the base
|
|||
|
|
wire of the second driver. This system would require that the
|
|||
|
|
series run primaries, and the drivers and extra coils be wound in
|
|||
|
|
opposite directions to achieve phase differential. The base wire
|
|||
|
|
current output of one coil becomes added input to the base of
|
|||
|
|
another.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2 Date: 14 Dec 93 12:33:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Robert Taylor
|
|||
|
|
Subj: Re: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> SEZ Robert Taylor to Richard Quick <=-
|
|||
|
|
|
|||
|
|
RT> Wanted to drop you a line & see if you got my post about a
|
|||
|
|
RT> month ago on the book that Barnes&Noble has out called *The
|
|||
|
|
RT> Inventions, Research, and Writings of Nikola Tesla*.
|
|||
|
|
|
|||
|
|
Yes I did. I take it then you missed my reply.
|
|||
|
|
|
|||
|
|
I own a copy, and a copy of nearly everything else worthy of note
|
|||
|
|
on the subject. I have posted a bibliography for source material
|
|||
|
|
on his more advanced work.
|
|||
|
|
|
|||
|
|
The book you mention is drawn from his public lectures and other
|
|||
|
|
"public domain" material. Things really start getting good when
|
|||
|
|
you access sources of material he produced that were never
|
|||
|
|
intended to become public. This private material, when combined
|
|||
|
|
with his patents and patent applications, reveals much larger
|
|||
|
|
plans.
|
|||
|
|
|
|||
|
|
Thank for checking up, and the book does make very interesting
|
|||
|
|
reading. It covers some of his early work in good detail.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1811 Date: 12-14-93 13:55
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> DH> There is a local park that is situated on Lake Washington
|
|||
|
|
> DH> near where I live, I have been toying with the idea of
|
|||
|
|
> DH> firing the coil off there, maybe out on one of the boat
|
|||
|
|
> DH> docks. Drop a bunch of Aluminum flashing over into the water
|
|||
|
|
> DH> for the ground.
|
|||
|
|
|
|||
|
|
RQ> DH> Could be kind of fun!
|
|||
|
|
|
|||
|
|
RQ>I have fired and grounded off of water grounds exactly as you are
|
|||
|
|
>thinking. They work great!
|
|||
|
|
|
|||
|
|
Great to hear!
|
|||
|
|
|
|||
|
|
|
|||
|
|
RQ>Good Luck! I hope to see a spark shot or two soon. Bring the
|
|||
|
|
>camcorder, and a 35 mm, and a few friends.
|
|||
|
|
|
|||
|
|
I am going out of town for fifteen days over the holidays but I should
|
|||
|
|
have something in a month or so after that. Have a lot of the raw
|
|||
|
|
materials - stuff for the capacitor. Need to get the neon transformers
|
|||
|
|
and actually wind the coil and build the base to hold the primary.
|
|||
|
|
|
|||
|
|
Things have been extremely busy at the store so I haven't had too much
|
|||
|
|
"spare time" but January has always been pretty slow.
|
|||
|
|
|
|||
|
|
Anyway, I am now getting the feed directly from SLUG-BBS so there
|
|||
|
|
should be no missing messages.
|
|||
|
|
|
|||
|
|
TTYL - Dave <20>:-)
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b The Disk Crash BBS - now with 360K Online
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1812 Date: 12-14-93 13:56
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
RQ> DH> In the mail this afternoon!
|
|||
|
|
|
|||
|
|
RQ>Thanks a lot. I just got back from a weekend in Chicago with my
|
|||
|
|
>new girlfriend (NICE!) and look forward to seeing it!
|
|||
|
|
|
|||
|
|
Sounds good! Gotta get me one of those sometime... Maybe after
|
|||
|
|
the coil is built... <grin>
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b Work: the worst thing you can do for your health.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1813 Date: 12-14-93 14:08
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>Thank you Dave for sending the magazine with the article on the
|
|||
|
|
>spark gap transmitters. It was interesting, but full of mis-
|
|||
|
|
>crediting. The author chose in many instances to detail the worst
|
|||
|
|
>systems of the era.
|
|||
|
|
|
|||
|
|
I thought you would get a kick out of it. I had intended you to keep
|
|||
|
|
the magazine - that was why there was just the return mailer for the
|
|||
|
|
disk. If you want, I can pop it in the mail again.
|
|||
|
|
|
|||
|
|
Anyway - I figured you would have some fun with the article. I
|
|||
|
|
have not made any major study of Tesla's life but what I have seen
|
|||
|
|
( Man out of Time by Cheny (sp?) plus a couple other articles ) makes
|
|||
|
|
me realize that he is very much an un-sung hero of electronics.
|
|||
|
|
|
|||
|
|
RQ>The photos of the damped wave trains were very interesting. The
|
|||
|
|
>author mentioned that the photos were made with reproduction
|
|||
|
|
>equipment that resembled units of the era as closely as posible.
|
|||
|
|
>I just find it galling that he would go through such efforts in
|
|||
|
|
>accuracy this area and would only mention Tesla's name once.
|
|||
|
|
|
|||
|
|
Yeah - it is like he is just copying the "party line" of the people
|
|||
|
|
who claimed to "develop" the equipment without doing any research on
|
|||
|
|
his part...
|
|||
|
|
|
|||
|
|
>The gaps would not quench well at these power levels, and the
|
|||
|
|
>short primary conductor does not provide sharp tune, good
|
|||
|
|
>coupling coefficients or energy transfers. Tesla's systems of
|
|||
|
|
>this era were much much more advanced.
|
|||
|
|
|
|||
|
|
The three turn primary also caught my eye. Plus the capacitance
|
|||
|
|
was probably huge and lossy - oil filled wooden boxes...
|
|||
|
|
|
|||
|
|
|
|||
|
|
RQ>BTW, the section in the article on the Wien quench gap manu-
|
|||
|
|
>factured and used in transmitters by Telefunken, exactly
|
|||
|
|
>corresponds to my post of over a month ago in this conference.
|
|||
|
|
>Tesla was paid royalty by Telefunken on every transmitter
|
|||
|
|
>produced until the start of WWI. These transmitters were on board
|
|||
|
|
>every German U-boat, and Tesla's system was used on large land
|
|||
|
|
>based transmitters used by the German command. Tesla offered
|
|||
|
|
>these patents to the U.S. military several times, but was turned
|
|||
|
|
|
|||
|
|
Now *that* is interesting!
|
|||
|
|
|
|||
|
|
Anyway, on to the next message - TTYL - Dave
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b New Resturant on the Moon. Good food but no
|
|||
|
|
atmosphere...
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1814 Date: 12-14-93 14:10
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>I have copied my archives from this thread, including much
|
|||
|
|
>material you may have missed, onto the disk you sent me. I am
|
|||
|
|
>also going to copy the article from the magizine you sent, and I
|
|||
|
|
>will return both shortly. I have had a very busy week, what with
|
|||
|
|
>a weekend to Chicago, and a new girlfriend, so I am running a
|
|||
|
|
>little behind. I still have not unpacked my suitcase.
|
|||
|
|
|
|||
|
|
Great! I got the disk - Thanks!
|
|||
|
|
|
|||
|
|
I also went and got the entire thread from SLUG-BBS so I will
|
|||
|
|
have everything in continuous order.
|
|||
|
|
|
|||
|
|
TTYL - Dave <20>:-)
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b Live long and phosphor...
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2666 Date: 12-14-93 14:23
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>Look forward to seeing some video/photos of your coiling work
|
|||
|
|
>soon. BTW did you really decide to lengthen the 6" coil form
|
|||
|
|
>from 24" to 30" in height? I would think this would require
|
|||
|
|
>more than the 1500' of magnet wire you had earmarked for this
|
|||
|
|
>project.
|
|||
|
|
|
|||
|
|
I was thinking of 30" all along. That stays within the 1:5
|
|||
|
|
aspect ratio limit. The thickness of the wire that I got will
|
|||
|
|
allow for 940 or so turns in 30" of length which works out right
|
|||
|
|
at 1500' feet of wire.
|
|||
|
|
|
|||
|
|
RQ>Also, I am seeing posts that you have quoted from others, but
|
|||
|
|
>I am not seeing the original posts here....
|
|||
|
|
|
|||
|
|
RQ>This looks to be a network problem, unless these people are
|
|||
|
|
>posting to you locally.... I wonder what is going on.
|
|||
|
|
|
|||
|
|
I had been using another BBS for the FIDO messages and they were
|
|||
|
|
having some problems with missing messages. I will be using
|
|||
|
|
SLUG-BBS from now on until I get my Planet Connect dish up and
|
|||
|
|
running. It is sitting in the store right now but I need to get
|
|||
|
|
on the roof and cut a hole through the ceiling for the feed-
|
|||
|
|
through and of course ( being Seattle ) it is raining pretty much
|
|||
|
|
continuously... Maybe August if I am lucky <grin>
|
|||
|
|
|
|||
|
|
Anyway, when the dish gets set up, I will start my own FIDO feed
|
|||
|
|
to my BBS.
|
|||
|
|
|
|||
|
|
RQ>I sent you a post last week mentioning that I saw you had made
|
|||
|
|
>a local logon here to the SLUG BBS, we narrowly missed a chat.
|
|||
|
|
>How long have you been calling locally? If you get the chance
|
|||
|
|
>since it appears you have a high speed modem you can grab the
|
|||
|
|
>thread here if you have any network problems. This board has
|
|||
|
|
>nearly all of my original posts in this conference still
|
|||
|
|
>available.
|
|||
|
|
|
|||
|
|
I already grabbed them - I had called a few times from home but
|
|||
|
|
the modem I am using there is an older one and it sometimes
|
|||
|
|
hangs. I will be calling from the store now.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2667 Date: 12-14-93 14:30
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Brian Carling
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
BC>thanks for the info. I am going to see what I can find at the
|
|||
|
|
>local library also.
|
|||
|
|
|
|||
|
|
Although I have not really researched Tesla's life all that much,
|
|||
|
|
from what I gather, he kept critical stuff from his patent
|
|||
|
|
applications because he had been screwed by Marconi and others.
|
|||
|
|
You need to read between the lines.
|
|||
|
|
|
|||
|
|
|
|||
|
|
DH> You could scale down the design but I feel that the amount of
|
|||
|
|
DH> time and money involved would be about the same regardless of
|
|||
|
|
DH> what size coil you are building so why not go for a bigger
|
|||
|
|
DH> one.
|
|||
|
|
|
|||
|
|
BC> No, I want to build the BIG one!
|
|||
|
|
|
|||
|
|
How big?
|
|||
|
|
|
|||
|
|
DH> The one I am building is 6" diameter, 30" tall and is powered
|
|||
|
|
DH> by a bank of four neon sign transformers.
|
|||
|
|
|
|||
|
|
BC> That doesn't sound too huge to construct...
|
|||
|
|
|
|||
|
|
It struck me as a nice size - large enough to produce nice 5'
|
|||
|
|
arcs but small enough as not to overwhelm my workshop or my
|
|||
|
|
budget.
|
|||
|
|
|
|||
|
|
BC> Do you connect the neon sign transformers in series or what?
|
|||
|
|
|
|||
|
|
A combination - the transformers are 12kV at 30mA so I will get
|
|||
|
|
24kV at 60mA by using four of them.
|
|||
|
|
|
|||
|
|
|
|||
|
|
DH> Down the road, I would like to experiment with a "pocket"
|
|||
|
|
DH> coil or a tabletop model but you do need a very very good
|
|||
|
|
DH> ground regardless of the size so this isn't something that
|
|||
|
|
DH> you could take somewhere and casually set it up and expect to
|
|||
|
|
DH> get good results.
|
|||
|
|
|
|||
|
|
BC> Why can't the one you describe be a "table-top" model?
|
|||
|
|
> 6" around by 30" tall would fit on most tables!
|
|||
|
|
|
|||
|
|
Yeah but I was thinking about one that was maybe 3" dia and 12"
|
|||
|
|
tall.
|
|||
|
|
|
|||
|
|
That would be impressive if it threw out foot-long arcs and from
|
|||
|
|
what all of the other designs of this type do, the arcs are
|
|||
|
|
several times longer than the length of the primary.
|
|||
|
|
|
|||
|
|
Imagine something sitting on the table, a foot tall and two feet
|
|||
|
|
or so in diameter ( the flat primary coil ) throwing off two foot
|
|||
|
|
long arcs!
|
|||
|
|
|
|||
|
|
DH> Anyway, keep tuned to this conference and I will be letting
|
|||
|
|
DH> people know how things are progressing!
|
|||
|
|
|
|||
|
|
BC> I'll watch eagerly!
|
|||
|
|
|
|||
|
|
Hey - start planing something! Get some neon transformers, some
|
|||
|
|
stuff to make the capacitors and a bunch of magnet wire and start
|
|||
|
|
building!
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1900 Date: 12-15-93 00:13
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>You should also make sure to run any HV power supply off a
|
|||
|
|
>variable autotransformer (variac). This way output voltage to
|
|||
|
|
>the experiment may be controlled smoothly.
|
|||
|
|
|
|||
|
|
DH> I already have a nice 5-amp which I am sure could take
|
|||
|
|
DH> momentary overloads.
|
|||
|
|
|
|||
|
|
I'm afraid this won't serve except for the smallest test coil.
|
|||
|
|
>>Sniff, Sniff, is that smoke I smell????<< >>Sniff<<
|
|||
|
|
|
|||
|
|
DH> There was a beautiful dual 240 volt Variac at Boeing
|
|||
|
|
DH> Surplus but it was part of larger DC power supply and they
|
|||
|
|
DH> wanted $700 for the whole thing. It was a good 15" in
|
|||
|
|
DH> diameter! Didn't catch the current rating - too dark to see
|
|||
|
|
DH> inside the case.
|
|||
|
|
|
|||
|
|
Most likely you were looking at a 29 amp+ rated Powerstat, these
|
|||
|
|
are just the ticket.
|
|||
|
|
|
|||
|
|
DH> I am seriously thinking of going back there and offering
|
|||
|
|
DH> them $100 cash just for the Variac and seeing if they will
|
|||
|
|
DH> take it...
|
|||
|
|
|
|||
|
|
Like I said, these are just the ticket. Powerstats made by
|
|||
|
|
Superior Electric are top of the line and are the most common
|
|||
|
|
industrial units I have seen. Glom on this puppy if you can, and
|
|||
|
|
if you can't, keep looking for another one. Powerstats are
|
|||
|
|
gangable, and they are common surplus. If you get one, odds are
|
|||
|
|
down the line you will come across another that will match the
|
|||
|
|
first and you can bolt the housings together and parallel wire
|
|||
|
|
them for pole pig operation.
|
|||
|
|
|
|||
|
|
A nice variac or two are about the only thing that you must plunk
|
|||
|
|
down $$$ for if you are serious about coiling. I paid $150.00
|
|||
|
|
each for mine, and never looked back. If I see another you can be
|
|||
|
|
sure I will plunk $150-$200 again without batting an eye. The
|
|||
|
|
price for new Powerstats would curl your hair and loosen teeth.
|
|||
|
|
|
|||
|
|
Now do you want to be sick? I was out in Richmond Virgina last
|
|||
|
|
summer visiting some coiling friends. They have a scrap yard
|
|||
|
|
there that would... well I can't use that language here. Anyway,
|
|||
|
|
Alex drives out in his van and picks up this cabinet loaded with
|
|||
|
|
meters, a plastic potted 5 kVA HV xfrmr, and a ganged array of
|
|||
|
|
six 45 amp Powerstats in NEW condition, complete with remote
|
|||
|
|
drive (geared, motor driven common shaft with remote unit)...
|
|||
|
|
Price...
|
|||
|
|
|
|||
|
|
$45.00 for the whole load, and the springs on his van were
|
|||
|
|
sagging badly. They guys out there said that the yard takes them,
|
|||
|
|
uses a cutter to cut the copper off of them, cut the toroid cores
|
|||
|
|
up, and scrap them valued around $5.00 each. I priced his array
|
|||
|
|
new at over $4500.00
|
|||
|
|
|
|||
|
|
DH> Also, I just sent the application off to Harry Goldman for
|
|||
|
|
DH> the TCBA membership.
|
|||
|
|
|
|||
|
|
Welcome aboard! If you told him I sent you then I get a free
|
|||
|
|
issue of the NEWS at no cost to either of us!!! Thanks!
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1901 Date: 12-15-93 01:33
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>Thank you Dave for sending the magazine with the article on
|
|||
|
|
>the spark gap transmitters. I copied everything that I wanted.
|
|||
|
|
|
|||
|
|
DH> Sometime in the next month or so, I will have to go through
|
|||
|
|
DH> and copy some other issues. They do an occasional
|
|||
|
|
DH> "History of Electronics" article. Fun stuff!
|
|||
|
|
|
|||
|
|
I would be interested in seeing more stuff like this if it
|
|||
|
|
catches your eye.
|
|||
|
|
|
|||
|
|
Referring to Tesla:
|
|||
|
|
|
|||
|
|
RQ>He was THE electrical genius of his time.
|
|||
|
|
|
|||
|
|
DH> I also think C. P. Steinmetz was an interesting character
|
|||
|
|
DH> but Tesla was way ahead of everyone.
|
|||
|
|
|
|||
|
|
Steinmetz was by no means a slacker. He gave us a lot in his area
|
|||
|
|
of expertise. But when it came to bulk technique, research, and
|
|||
|
|
knowledge; Tesla was a head and shoulders above the crowd.
|
|||
|
|
(literally and figuratively)
|
|||
|
|
|
|||
|
|
Tesla's genius spanned an important era in mankinds history. His
|
|||
|
|
foresight ranks with Da Vinci, and his technical abilities were
|
|||
|
|
second to none. He intellect was broad, where others were very
|
|||
|
|
narrow and focused.
|
|||
|
|
|
|||
|
|
Tesla was a mechanical engineer, an electrical engineer, a radio
|
|||
|
|
engineer, and a visionary. I have seen credits that he was a
|
|||
|
|
graduate of the Univeristy of Prague, but research done there by
|
|||
|
|
others show that he was never even enrolled, though it is
|
|||
|
|
possible he audited classes. Indeed he did not have access to
|
|||
|
|
funds to pay for a higher education. Yet he handed (hand drawn)
|
|||
|
|
plans for the first AC induction motor to a shop foreman for
|
|||
|
|
construction. The motor worked perfectly without modification or
|
|||
|
|
adjustments, and the exact same design is still used today.
|
|||
|
|
Without missing a step he went on to design three, then four,
|
|||
|
|
then six phase motors. Along the way he designed the power grid
|
|||
|
|
to supply them.
|
|||
|
|
|
|||
|
|
He did this not once in one area, but hundreds and hundreds of
|
|||
|
|
times in numerous areas during his working career. Steam powered
|
|||
|
|
electro-mechanical oscillators, high frequency alternators,
|
|||
|
|
bladeless turbines and pumps, viscosity speedometers, electrical
|
|||
|
|
oscillators, X-Ray machines, CW transmitters, wave guides, the
|
|||
|
|
list goes on, and on, and on.
|
|||
|
|
|
|||
|
|
The work that he documented, patented, and/or published covers
|
|||
|
|
but a small but significant fraction of the discoveries and
|
|||
|
|
research he did. Most times he was moving so fast that he did not
|
|||
|
|
have time to write things down.
|
|||
|
|
|
|||
|
|
A good example is the Colorado Springs work. He did incredible
|
|||
|
|
things with the large coils that are only appreciated today, long
|
|||
|
|
past the time his name has been dropped from the mainstream
|
|||
|
|
history books. In an interview after his return to New York (from
|
|||
|
|
Colorado Springs) Tesla made the headlines by stating he had
|
|||
|
|
detected wireless transmission from Mars. He stated he tuned the
|
|||
|
|
machine to the detected frequencies and made a reply. At the time
|
|||
|
|
he was of course thought to be wacko (as Guy Daugherty would put
|
|||
|
|
it). Marconi had not yet managed to send a reliable signal.
|
|||
|
|
|
|||
|
|
Tesla had already set his large coils up, and experimeted with
|
|||
|
|
them connected to a relay type tone receiever (no superhets
|
|||
|
|
yets). His tuning and amplification circuits (unpublished
|
|||
|
|
designs) were so sensitive that in an era of "stone knives and
|
|||
|
|
bear skins" (remember the automobile was nearing invention in a
|
|||
|
|
few years) he was able to listen to pulsars through a telephone
|
|||
|
|
handset. Thus, using his coil setup exactly as pictured in the
|
|||
|
|
famous photos, he changed a few connections, and had successfully
|
|||
|
|
built and operated the first radio telescope.
|
|||
|
|
|
|||
|
|
I will forgive him that his overactive imagination led him to
|
|||
|
|
believe he was recieving signals from mars, especially since the
|
|||
|
|
nearest pulsar is many light years further away, the signal is
|
|||
|
|
exceedingly weak, and radio had not been invented yet (by
|
|||
|
|
Marconi).
|
|||
|
|
|
|||
|
|
The same coils operated X-Ray tubes of his design that took X-Ray
|
|||
|
|
photos at 100 feet. They also were able to cavity resonate the
|
|||
|
|
earth at frequencies under 30 kHz. In addition (using the same
|
|||
|
|
coils) he was the first (and last until 1988) to produce
|
|||
|
|
synthetic ball lightning.
|
|||
|
|
|
|||
|
|
I could go on. The bottom line is the other famous names of the
|
|||
|
|
era were good, but they were narrow and clumsy compared to the
|
|||
|
|
light that Tesla threw.
|
|||
|
|
|
|||
|
|
Someone mentioned a book from Barnes and Nobel: The Inventions
|
|||
|
|
Writings, and Research of Nickola Tesla. In the lectures
|
|||
|
|
published in the book, Tesla demonstrates a single terminal bulb
|
|||
|
|
with a brush discharge (1891). The book shows photos of this and
|
|||
|
|
several similar bulbs. Tesla clearly states that he sees a
|
|||
|
|
potential for this effect as an amplifier and detector.
|
|||
|
|
|
|||
|
|
The "brush discharge" in this demonstration is a directed
|
|||
|
|
electron beam from the center terminal of the bulb to the glass.
|
|||
|
|
What he is demonstrating is the principal behind the electron
|
|||
|
|
microscope. Yet at the same time (within months) he patents a
|
|||
|
|
number of tuned circuits that still form the basis of radio
|
|||
|
|
today. It was a question of time, money, and resources. Electron
|
|||
|
|
microscopes or radio? Tesla must have figured radio was a
|
|||
|
|
priority (he patented), and threw hints out to the crowded
|
|||
|
|
lecture hall about electron microscopes (public domain) where
|
|||
|
|
they were not understood or followed up on.
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2714 Date: 12-15-93 11:04
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
RQ>Good Luck! I hope to see a spark shot or two soon. Bring the
|
|||
|
|
>camcorder, and a 35 mm, and a few friends.
|
|||
|
|
|
|||
|
|
DH> I am going out of town for fifteen days over the holidays
|
|||
|
|
DH> but I should have something in a month or so after that.
|
|||
|
|
DH> Have a lot of the raw materials - stuff for the capacitor.
|
|||
|
|
DH> Need to get the neon transformers and actually wind the coil
|
|||
|
|
DH> and build the base to hold the primary. Things have been
|
|||
|
|
DH> extremely busy at the store so I haven't had too much
|
|||
|
|
DH> "spare time" but January has always been pretty slow.
|
|||
|
|
|
|||
|
|
Great, then at least you are are in the planning stage and are
|
|||
|
|
organizing yourself for the various constructions.
|
|||
|
|
|
|||
|
|
DH> Anyway, I am now getting the feed directly from SLUG-BBS so
|
|||
|
|
DH> there should be no missing messages.
|
|||
|
|
|
|||
|
|
And no delay!!!
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2715 Date: 12-15-93 12:11
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> SEZ Dave Halliday to Richard Quick <=-
|
|||
|
|
|
|||
|
|
RQ>Thank you Dave for sending the magazine with the article on
|
|||
|
|
>the spark gap transmitters. It was interesting, but full of
|
|||
|
|
>miscrediting. The author chose in many instances to detail
|
|||
|
|
>the worst systems of the era.
|
|||
|
|
|
|||
|
|
DH> I thought you would get a kick out of it. I had intended
|
|||
|
|
DH> you to keep the magazine - that was why there was just the
|
|||
|
|
DH> return mailer for the disk. If you want, I can pop it in
|
|||
|
|
DH> the mail again.
|
|||
|
|
|
|||
|
|
No need. I copied everything that I wanted.
|
|||
|
|
|
|||
|
|
DH> Anyway - I figured you would have some fun with the article.
|
|||
|
|
DH> I have not made any major study of Tesla's life but what I
|
|||
|
|
DH> have seen ( Man out of Time by Cheny (sp?) plus a couple
|
|||
|
|
DH> other articles ) makes me realize that he is very much an
|
|||
|
|
DH> un-sung hero of electronics.
|
|||
|
|
|
|||
|
|
He was THE electrical genius of his time.
|
|||
|
|
|
|||
|
|
>I just find it galling that he would go through such efforts in
|
|||
|
|
>accuracy this area and would only mention Tesla's name once.
|
|||
|
|
|
|||
|
|
DH> Yeah - it is like he is just copying the "party line" of the
|
|||
|
|
DH> people who claimed to "develop" the equipment without doing
|
|||
|
|
DH> any research on his part...
|
|||
|
|
|
|||
|
|
Exactly. Tesla developed and experimented with every type system
|
|||
|
|
mentioned in the article before the people credited for these
|
|||
|
|
systems.
|
|||
|
|
|
|||
|
|
>The gaps would not quench well at these power levels, and the
|
|||
|
|
>short primary conductor does not provide sharp tune, good
|
|||
|
|
>coupling coefficients or energy transfers. Tesla's systems of
|
|||
|
|
>this era were much much more advanced.
|
|||
|
|
|
|||
|
|
DH> The three turn primary also caught my eye. Plus the
|
|||
|
|
DH> capacitance was probably huge and lossy - oil filled wooden
|
|||
|
|
DH> boxes...
|
|||
|
|
|
|||
|
|
Yeah, the signal generated by this system would have been highly
|
|||
|
|
eratic. The pulses would have been very intense due to the
|
|||
|
|
capacitor size, but the output had to be a far cry from being a
|
|||
|
|
"smooth" powerful signal. Tesla on the other hand was using a
|
|||
|
|
tiny capacitance in a "balanced" tank circuit with very close
|
|||
|
|
coupling, and extremely fast quenching, ultra high speed gaps.
|
|||
|
|
|
|||
|
|
He processed only 250 kVA (50 kVA less input power than the large
|
|||
|
|
Marconi xmittr) in Colorado Springs, but his output was CW,
|
|||
|
|
frequency stable, beat free, RF signal. His power processing
|
|||
|
|
efficiency was over 70% from the supply line to the antenna mast.
|
|||
|
|
His antenna current was a modest 1100 rms amps, with a peak power
|
|||
|
|
in excess of 10 gigawatts. Not bad for a guy in 1900 with a
|
|||
|
|
shoestring budget and salt water/glass caps.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2716 Date: 12-15-93 13:28
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> SEZ Dave Halliday to Brian Carling <=-
|
|||
|
|
|
|||
|
|
BC>Do you connect the neon sign transformers in series or what?
|
|||
|
|
|
|||
|
|
DH> A combination - the transformers are 12kV at 30mA so I will
|
|||
|
|
DH> get 24kV at 60mA by using four of them.
|
|||
|
|
|
|||
|
|
Nope, won't work. Each secondary coil in the neon xfrmr is
|
|||
|
|
grounded to the core. This setup will not allow the secondaries
|
|||
|
|
to be placed in series. Other type xfrmrs may be placed in
|
|||
|
|
series, such as plate, potential, and pig xfrmrs, but not neons.
|
|||
|
|
|
|||
|
|
The secondaries may be placed in parallel for higher currents,
|
|||
|
|
but you are voltage limited. This is OK really because you will
|
|||
|
|
have trouble making or finding caps that will hold up to 24
|
|||
|
|
kvac pulse.
|
|||
|
|
|
|||
|
|
The primaries on neons are not grounded. The primaries may be
|
|||
|
|
run in parallel, so you may gang up as many as you want at 120
|
|||
|
|
volts as long as your circuit will stand up to the load (which
|
|||
|
|
may be surprisingly high if you don't use pfc capacitance).
|
|||
|
|
|
|||
|
|
However for anything larger than 1.5 kVA you will most likely be
|
|||
|
|
looking hard at 240 volt operation to reduce the current load. In
|
|||
|
|
this case you may take two neons of the same rating, place the
|
|||
|
|
primaries in series, and throw 240 across the two units. The
|
|||
|
|
secondaries are all parallel wired to the high voltage buss,
|
|||
|
|
regardless of the arrangement of the primaries. This way really
|
|||
|
|
large power supplies may be built up slowly, by simply adding
|
|||
|
|
pairs of neons to the bank. I have run up to 12 neons (6 pairs
|
|||
|
|
wired for 240 volt operation) for power supplies in excess of 4
|
|||
|
|
kVA for medium sized coil systems.
|
|||
|
|
|
|||
|
|
Phasing is important in running banks of neons. Not all neons are
|
|||
|
|
wired in the same direction. If the primary or secondary coils
|
|||
|
|
are reverse wired on some units, they will cancel out other
|
|||
|
|
units. A little time may be required to make sure that all of the
|
|||
|
|
neons are wired in phase. Nothing special is required to do this,
|
|||
|
|
just identify the out of phase unit, and reverse the line power
|
|||
|
|
connections, or reverse the secondary connection to the HV buss.
|
|||
|
|
|
|||
|
|
You should also make sure to run any HV power supply off a
|
|||
|
|
variable autotransformer (variac). This way output voltage to the
|
|||
|
|
experiment may be controlled smoothly.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1867 Date: 12-15-93 14:38
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Scott Hoffman
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> SEZ Scott Hoffman to All <=-
|
|||
|
|
|
|||
|
|
SH> Anybody know where i can get really, really, really, really,
|
|||
|
|
SH> really, really, BIG, BIG, Capacitors, that can handle
|
|||
|
|
SH> massive currents, and voltages. I need them for my laser
|
|||
|
|
SH> project. The caps I had have blown and I learned that the
|
|||
|
|
SH> manufacturer is out of business. I'm not talking Radio Shack
|
|||
|
|
SH> special order caps. either. The ones I have are the size of
|
|||
|
|
SH> car batteries. I wont bother giving the specs. ( I know some
|
|||
|
|
SH> of you geniuses can't do anything without specs. and
|
|||
|
|
SH> schematics, but I no longer have the documentation.) The
|
|||
|
|
SH> "really BIG" x 6 comment should give you an indication of
|
|||
|
|
SH> what i'm talking about. Uh...Some of you might ask what i
|
|||
|
|
SH> need a power supply this big for, for an ordinary laser.
|
|||
|
|
SH> well....it's no helium-neon. It's a 8 foot nitrogen laser.
|
|||
|
|
SH> And requires a pulse of current of massive proportions to
|
|||
|
|
SH> excite the atoms. Hope someone can help!!!
|
|||
|
|
|
|||
|
|
This is the thread you need to be addressing if you are into high
|
|||
|
|
energy devices. You missed a number of very good posts here in
|
|||
|
|
regarding these giant type HV pulse discharging capacitors.
|
|||
|
|
|
|||
|
|
Please be specific, I can supply any information you need on this
|
|||
|
|
subject as I have a lot of experience designing, constructing,
|
|||
|
|
and buying caps of this type. If your BBS carries any archives
|
|||
|
|
you should download about the last months worth of posts in this
|
|||
|
|
conference and scan this thread for an idea of what I am talking
|
|||
|
|
about.
|
|||
|
|
|
|||
|
|
Post the value you need, and the voltage requirements. I work
|
|||
|
|
with Tesla Tank circuits that generally require at least 10 KVAC
|
|||
|
|
pulse discharging caps. In a DC application you can push a
|
|||
|
|
homemade cap of this type to 30-35 KVDC without a problem.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1869 Date: 12-15-93 17:15
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
RQ> RQ>Good Luck! I hope to see a spark shot or two soon. Bring the
|
|||
|
|
> >camcorder, and a 35 mm, and a few friends.
|
|||
|
|
|
|||
|
|
RQ> DH> I am going out of town for fifteen days over the holidays
|
|||
|
|
> DH> but I should have something in a month or so after that.
|
|||
|
|
> DH> Have a lot of the raw materials - stuff for the capacitor.
|
|||
|
|
|
|||
|
|
RQ>Great, then at least you are are in the planning stage and are
|
|||
|
|
>organizing yourself for the various constructions.
|
|||
|
|
|
|||
|
|
Yeah - I have a really good idea as to what goes into the
|
|||
|
|
construction so any time I see something that would be useful,
|
|||
|
|
I stockpile it.
|
|||
|
|
|
|||
|
|
I plan to continue building after this first one. My friend who is
|
|||
|
|
working with me is curious about building a small one.
|
|||
|
|
|
|||
|
|
We were talking about something a foot tall, 3" diameter. Judging from
|
|||
|
|
the other coils, it might be good for two foot arcs.
|
|||
|
|
|
|||
|
|
RQ> DH> Anyway, I am now getting the feed directly from SLUG-BBS so
|
|||
|
|
> DH> there should be no missing messages.
|
|||
|
|
|
|||
|
|
RQ>And no delay!!!
|
|||
|
|
|
|||
|
|
Yeah - the other BBS was really lax about mail runs. I went and
|
|||
|
|
got all of the FIDO - Electronics messages and have been going through
|
|||
|
|
and making a text file of the dialogue.
|
|||
|
|
|
|||
|
|
TTYL - Dave <20>:-)
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b 15 of every stamp is for storage...
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1871 Date: 12-15-93 17:28
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> BC>Do you connect the neon sign transformers in series or what?
|
|||
|
|
|
|||
|
|
RQ> DH> A combination - the transformers are 12kV at 30mA so I will
|
|||
|
|
> DH> get 24kV at 60mA by using four of them.
|
|||
|
|
|
|||
|
|
RQ>Nope, won't work. Each secondary coil in the neon xfrmr is
|
|||
|
|
>grounded to the core. This setup will not allow the secondaries
|
|||
|
|
>to be placed in series. Other type xfrmrs may be placed in
|
|||
|
|
>series, such as plate, potential, and pig xfrmrs, but not neons.
|
|||
|
|
|
|||
|
|
Whoops... Shows what I know <grin> I thought the multiple
|
|||
|
|
transformers were for both current and voltage increase.
|
|||
|
|
|
|||
|
|
RQ>The secondaries may be placed in parallel for higher currents,
|
|||
|
|
>but you are voltage limited. This is OK really because you will
|
|||
|
|
>have trouble making or finding caps that will hold up to 24
|
|||
|
|
>kvac pulse.
|
|||
|
|
|
|||
|
|
Makes sense!
|
|||
|
|
|
|||
|
|
RQ>However for anything larger than 1.5 kVA you will most likely be
|
|||
|
|
>looking hard at 240 volt operation to reduce the current load. In
|
|||
|
|
>this case you may take two neons of the same rating, place the
|
|||
|
|
>primaries in series, and throw 240 across the two units. The
|
|||
|
|
>secondaries are all parallel wired to the high voltage buss,
|
|||
|
|
>regardless of the arrangement of the primaries. This way really
|
|||
|
|
>large power supplies may be built up slowly, by simply adding
|
|||
|
|
>pairs of neons to the bank. I have run up to 12 neons (6 pairs
|
|||
|
|
>wired for 240 volt operation) for power supplies in excess of
|
|||
|
|
>4 kVA for medium sized coil systems.
|
|||
|
|
|
|||
|
|
OK - I see where I got off the track - you were referring to pairs of
|
|||
|
|
transformers, I thought they were running in a series-secondary mode...
|
|||
|
|
|
|||
|
|
RQ>You should also make sure to run any HV power supply off a
|
|||
|
|
>variable autotransformer (variac). This way output voltage to the
|
|||
|
|
>experiment may be controlled smoothly.
|
|||
|
|
|
|||
|
|
I already have a nice 5-amp which I am sure could take momentary
|
|||
|
|
overloads. There was a beautiful dual 240 volt Variac at Boeing
|
|||
|
|
Surplus but it was part of larger DC power supply and they wanted
|
|||
|
|
$700 for the whole thing. It was a good 15" in diameter! Didn't
|
|||
|
|
catch the current rating - too dark to see inside the case.
|
|||
|
|
|
|||
|
|
I am seriously thinking of going back there and offering them
|
|||
|
|
$100 cash just for the Variac and seeing if they will take it...
|
|||
|
|
|
|||
|
|
Also, I just sent the application off to Harry Goldman for the
|
|||
|
|
TCBA membership.
|
|||
|
|
|
|||
|
|
TTYL - Dave <20>:-)
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b In New Guinea: cargo cults. In the U.S.:
|
|||
|
|
vaporware.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1870 Date: 12-15-93 17:29
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> RQ>Thank you Dave for sending the magazine with the article on
|
|||
|
|
> >the spark gap transmitters. It was interesting, but full of
|
|||
|
|
|
|||
|
|
RQ> DH> I thought you would get a kick out of it. I had intended
|
|||
|
|
> DH> you to keep the magazine - that was why there was just the
|
|||
|
|
|
|||
|
|
RQ>No need. I copied everything that I wanted.
|
|||
|
|
|
|||
|
|
OK - I'll keep it here then. Sometime in the next month or so, I
|
|||
|
|
will have to go through and copy some other issues. They do an
|
|||
|
|
occasional "History of Electronics" article. Fun stuff!
|
|||
|
|
|
|||
|
|
> DH> I have not made any major study of Tesla's life but what I
|
|||
|
|
> DH> have seen ( Man out of Time by Cheny (sp?) plus a couple
|
|||
|
|
> DH> other articles ) makes me realize that he is very much an
|
|||
|
|
> DH> un-sung hero of electronics.
|
|||
|
|
|
|||
|
|
RQ>He was THE electrical genius of his time.
|
|||
|
|
|
|||
|
|
I also think C. P. Steinmetz was an interesting character but
|
|||
|
|
Tesla was way ahead of everyone.
|
|||
|
|
|
|||
|
|
Anyway, TTYL - Dave
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b I need a cordless extension cord, please
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2797 Date: 12-16-93 09:05
|
|||
|
|
From: Tom Moeller
|
|||
|
|
To: Scott Hoffman
|
|||
|
|
Subj: Re: Big Caps.
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
SH> Anybody know where i can get really, really, really,
|
|||
|
|
SH> really, really, really, BIG, BIG, Capacitors, that can
|
|||
|
|
SH> handle massive currents, and voltages. I need them for my
|
|||
|
|
SH> laser project. The caps. I had have blown and i learned
|
|||
|
|
SH> that the manufacturer is out of business.
|
|||
|
|
|
|||
|
|
GE Capacitors in Fort Edward, NY makes some "large" capacitors...
|
|||
|
|
will 1.1uF at 62.5kV do? Their 30F1400 series goes from 5kV to 62.5kV,
|
|||
|
|
in sizes from 8x4x5.5 inches up to 13.5x6x16.5 inches. The information
|
|||
|
|
book I have here doesn't list any specs (oops! Sorry!) for the Effective
|
|||
|
|
Series Resistance (ESR) so you might check with their applications
|
|||
|
|
department before sending them your VISA number.
|
|||
|
|
|
|||
|
|
SH> The ones I have are the size of car batteries. I wont
|
|||
|
|
SH> bother giving the specs. ( I know some of you geniuses can't
|
|||
|
|
SH> do anything without specs. and schematics, but I no longer
|
|||
|
|
SH> have the documentation.)
|
|||
|
|
|
|||
|
|
Oh, sorry, you're right. I guess all the "geniuses" here shouldn't
|
|||
|
|
answer your plea for help. |-}
|
|||
|
|
|
|||
|
|
SH> Some of you might ask what
|
|||
|
|
SH> i need a power supply this big for, for an ordinary laser.
|
|||
|
|
SH> well....it's no helium-neon. It's a 8 foot nitrogen laser.
|
|||
|
|
SH> And requires a pulse of current of massive proportions to
|
|||
|
|
SH> excite the atoms.
|
|||
|
|
|
|||
|
|
I know an engineer (oops, another genius!) who worked on a laser drilling
|
|||
|
|
system - high accuracy pinholes thru titanium. He says his capacitor bank
|
|||
|
|
|
|||
|
|
was made out of similar sized capacitors, with inductors in series along
|
|||
|
|
the way. By changing the connections and ratios of capacitance and
|
|||
|
|
inductance, they could change the pulse duration of the laser blast.
|
|||
|
|
Theirs was a flash-excited CO2 laser, though, instead of nitrogen.
|
|||
|
|
|
|||
|
|
|
|||
|
|
- Tom
|
|||
|
|
|
|||
|
|
-!- EZPoint V2.1
|
|||
|
|
! Origin: Encore Electronics (1:267/14.42)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1903 Date: 12-16-93 10:55
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>RQ>You should also make sure to run any HV power supply off a
|
|||
|
|
> >variable autotransformer (variac). This way output voltage to
|
|||
|
|
> >the experiment may be controlled smoothly.
|
|||
|
|
|
|||
|
|
RQ> DH> I already have a nice 5-amp which I am sure could take
|
|||
|
|
> DH> momentary overloads.
|
|||
|
|
|
|||
|
|
RQ>I'm afraid this won't serve except for the smallest test coil.
|
|||
|
|
>>>Sniff, Sniff, is that smoke I smell????<< >>Sniff<<
|
|||
|
|
|
|||
|
|
Drat... I'll just keep it on my service bench then...
|
|||
|
|
|
|||
|
|
RQ> DH> There was a beautiful dual 240 volt Variac at Boeing
|
|||
|
|
|
|||
|
|
RQ>Most likely you were looking at a 29 amp+ rated Powerstat, these
|
|||
|
|
>are just the ticket.
|
|||
|
|
|
|||
|
|
RQ>Like I said, these are just the ticket. Powerstats made by
|
|||
|
|
>Superior Electric are top of the line and are the most common
|
|||
|
|
>industrial units I have seen. Glom on this puppy if you can, and
|
|||
|
|
>if you can't, keep looking for another one. Powerstats are
|
|||
|
|
>gangable, and they are common surplus. If you get one, odds are
|
|||
|
|
|
|||
|
|
This one was a dual unit. I will try an offer - see what they say. The
|
|||
|
|
unit has been there for a few months so they might be tempted. The
|
|||
|
|
console that the Variac is mounted in is similar to your power control
|
|||
|
|
console - about 5 feet tall, the top third is sloped. I might just
|
|||
|
|
offer them $100 cash for that part of it. The DC supply that it
|
|||
|
|
connects to is in a 55 gallon drum.
|
|||
|
|
|
|||
|
|
RQ>A nice variac or two are about the only thing that you must plunk
|
|||
|
|
>down $$$ for if you are serious about coiling. I paid $150.00
|
|||
|
|
>each for mine, and never looked back. If I see another you can be
|
|||
|
|
>sure I will plunk $150-$200 again without batting an eye. The
|
|||
|
|
>price for new Powerstats would curl your hair and loosen teeth.
|
|||
|
|
|
|||
|
|
I looked at the price for a 15 Amp unit and my hair curled at
|
|||
|
|
that...
|
|||
|
|
|
|||
|
|
RQ>Now do you want to be sick? I was out in Richmond Virgina last
|
|||
|
|
>summer visiting some coiling friends. They have a scrap yard
|
|||
|
|
>there that would... well I can't use that language here. Anyway,
|
|||
|
|
|
|||
|
|
>six 45 amp Powerstats in NEW condition, complete with remote
|
|||
|
|
>drive (geared, motor driven common shaft with remote unit)...
|
|||
|
|
>Price...
|
|||
|
|
|
|||
|
|
RQ>$45.00 for the whole load, and the springs on his van were
|
|||
|
|
|
|||
|
|
Hey Richard... Thanks a *lot* <grin> Just what I wanted to hear...
|
|||
|
|
|
|||
|
|
There are a couple of technological junk yards here too but the people
|
|||
|
|
running them have an inflated idea of what the stuff is worth. Three of
|
|||
|
|
them have gone out of business in the last few years so maybe they are
|
|||
|
|
willing to listen to reason... ( They will check a current catalog
|
|||
|
|
price and then sell the surplus goods for 50% of that cost... Gimme a
|
|||
|
|
break! )
|
|||
|
|
|
|||
|
|
RQ> DH> Also, I just sent the application off to Harry Goldman for
|
|||
|
|
> DH> the TCBA membership.
|
|||
|
|
|
|||
|
|
RQ>Welcome aboard! If you told him I sent you then I get a free
|
|||
|
|
>issue of the NEWS at no cost to either of us!!! Thanks!
|
|||
|
|
|
|||
|
|
I sure did! Anyway, I will talk with you later - Dave
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b Windows 3.1 - The colorful clown suit for DOS...
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1904 Date: 12-16-93 11:13
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil 1/2
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> DH> Sometime in the next month or so, I will have to go through
|
|||
|
|
> DH> and copy some other issues. They do an occasional
|
|||
|
|
> DH> "History of Electronics" article. Fun stuff!
|
|||
|
|
|
|||
|
|
RQ>I would be interested in seeing more stuff like this if it
|
|||
|
|
>catches your eye.
|
|||
|
|
|
|||
|
|
I will do that - I keep some of the back issues.
|
|||
|
|
|
|||
|
|
RQ>Referring to Tesla:
|
|||
|
|
|
|||
|
|
RQ> RQ>He was THE electrical genius of his time.
|
|||
|
|
|
|||
|
|
RQ> DH> I also think C. P. Steinmetz was an interesting character
|
|||
|
|
> DH> but Tesla was way ahead of everyone.
|
|||
|
|
|
|||
|
|
RQ>Steinmetz was by no means a slacker. He gave us a lot in his area
|
|||
|
|
>of expertise. But when it came to bulk technique, research, and
|
|||
|
|
>knowledge; Tesla was a head and shoulders above the crowd.
|
|||
|
|
>(literally and figuratively)
|
|||
|
|
|
|||
|
|
This is true! My favorite Stienmetz story was that he could
|
|||
|
|
never get the hang of driving. He was always running the car up
|
|||
|
|
onto peoples lawns, into other cars, etc... He had a car customized
|
|||
|
|
with a second set of controls in the trunk and he had someone
|
|||
|
|
sitting there, looking through a periscope and doing the actual
|
|||
|
|
driving while he would serenely cruise through the neighborhood,
|
|||
|
|
hand on the wheel, smoking a cigar...
|
|||
|
|
|
|||
|
|
Fun stuff...
|
|||
|
|
|
|||
|
|
RQ>Tesla's genius spanned an important era in mankinds history. His
|
|||
|
|
>foresight ranks with Da Vinci, and his technical abilities were
|
|||
|
|
>second to none. He intellect was broad, where others were very
|
|||
|
|
>narrow and focused.
|
|||
|
|
|
|||
|
|
This is what I gathered too - I also heard about the remote control
|
|||
|
|
vehicles he built - the submersible boat ( no antennas either )
|
|||
|
|
|
|||
|
|
RQ>Tesla was a mechanical engineer, an electrical engineer, a radio
|
|||
|
|
>engineer, and a visionary. I have seen credits that he was a
|
|||
|
|
|
|||
|
|
>funds to pay for a higher education. Yet he handed (hand drawn)
|
|||
|
|
>plans for the first AC induction motor to a shop foreman for
|
|||
|
|
>construction. The motor worked perfectly without modification or
|
|||
|
|
>adjustments, and the exact same design is still used today.
|
|||
|
|
>Without missing a step he went on to design three, then four,
|
|||
|
|
>then six phase motors. Along the way he designed the power grid
|
|||
|
|
>to supply them.
|
|||
|
|
|
|||
|
|
Yeah - I heard that he was sitting on a bench somewhere and the motor
|
|||
|
|
came into his head completely formed. Just sitting there in his
|
|||
|
|
imagination, running smoothly...
|
|||
|
|
|
|||
|
|
RQ>He did this not once in one area, but hundreds and hundreds of
|
|||
|
|
|
|||
|
|
>bladeless turbines and pumps, viscosity speedometers, electrical
|
|||
|
|
|
|||
|
|
I know about the turbines - a flat disk, no cups or anything -
|
|||
|
|
high speed and very efficient...
|
|||
|
|
|
|||
|
|
RQ>I will forgive him that his overactive imagination led him to
|
|||
|
|
>believe he was recieving signals from mars, especially since the
|
|||
|
|
>nearest pulsar is many light years further away, the signal is
|
|||
|
|
>exceedingly weak, and radio had not been invented yet (by
|
|||
|
|
>Marconi).
|
|||
|
|
|
|||
|
|
Interesting - kinda pre-dates Janssky ( sp? ) by a few years...
|
|||
|
|
|
|||
|
|
|
|||
|
|
RQ>I could go on. The bottom line is the other famous names of the
|
|||
|
|
>era were good, but they were narrow and clumsy compared to the
|
|||
|
|
>light that Tesla threw.
|
|||
|
|
|
|||
|
|
RQ>Someone mentioned a book from Barnes and Nobel: The Inventions
|
|||
|
|
>Writings, and Research of Nickola Tesla. In the lectures
|
|||
|
|
>published in the book, Tesla demonstrates a single terminal bulb
|
|||
|
|
>with a brush discharge (1891). The book shows photos of this and
|
|||
|
|
|
|||
|
|
Interesting - I'll have to look for it. I just picked up a copy
|
|||
|
|
of a 1904 reprint: Experiments with Alternate Currents of High
|
|||
|
|
Potential and High Frequency - the text of a lecture he gave at the
|
|||
|
|
Institution of Electrical Engineers in London.
|
|||
|
|
|
|||
|
|
There is also an appendix: Transmission of Electric Energy
|
|||
|
|
without Wires.
|
|||
|
|
|
|||
|
|
The book is published by Angriff Press, P.O. Box 2726, Hollywood,
|
|||
|
|
CA 90078 ISBN# 913022-25-X
|
|||
|
|
|
|||
|
|
The book details a lot of the electrical discharge lights. From the
|
|||
|
|
text of the book it sounds like he was quite an energetic lecturer too..
|
|||
|
|
|
|||
|
|
I know where *I* want to set the time machine!
|
|||
|
|
|
|||
|
|
Anyway, I will be going away for two weeks, getting back on the
|
|||
|
|
first.
|
|||
|
|
|
|||
|
|
If I do not talk with you before then, have a great holiday!
|
|||
|
|
|
|||
|
|
TTYL - Dave <20>:-)
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b Money has proved the most dangerous of hallucinogens.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 16 Dec 93 17:35:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Again referring to Tesla:
|
|||
|
|
|
|||
|
|
DH> Yeah - I heard that he was sitting on a bench somewhere and
|
|||
|
|
DH> the motor came into his head completely formed. Just
|
|||
|
|
DH> sitting there in his imagination, running smoothly...
|
|||
|
|
|
|||
|
|
This is apparently true, Tesla told the story on more than one
|
|||
|
|
occasion. Many other notables of genius status have said their
|
|||
|
|
greatest ideas came in similar fashion, or in dreams; but few
|
|||
|
|
were as prolific as Tesla.
|
|||
|
|
|
|||
|
|
It seems that ideas like this came to him very frequently over a
|
|||
|
|
number of years. He complained more than once that it was simply
|
|||
|
|
impossible for him to act on all of them. Tesla read Edison's
|
|||
|
|
quip that invention was "1% inspriation and 99% perspiration" and
|
|||
|
|
remarked that the inverse was in fact the truth. He stated that
|
|||
|
|
he was able to operate sophisticated mechanical and electrical
|
|||
|
|
devices in his head to determine feasibility prior to drawing or
|
|||
|
|
constructing the actual device. He followed this statement up by
|
|||
|
|
saying that he never built a device that did not operate as
|
|||
|
|
anticipated.
|
|||
|
|
|
|||
|
|
In his later years, after failing to fund the Wardenclyff
|
|||
|
|
transmitter to completion, he was unable to maintain a
|
|||
|
|
laboratory. He did not stop inventing however. He set his MIND to
|
|||
|
|
work building, testing, and operating equipment. The result of
|
|||
|
|
his purely mental efforts were designs for such devices as
|
|||
|
|
particle beam weapons. This mental work came into tangible
|
|||
|
|
existence in the form of drawings for such components as the open
|
|||
|
|
ended vacuum tube (one end open to STP) for generating high
|
|||
|
|
energy particle beams.
|
|||
|
|
|
|||
|
|
It is one of the true crimes against humanity that he was so
|
|||
|
|
misunderstood that even a small lab could not be furnished to
|
|||
|
|
allow him practical creative outlets, though much blame may be
|
|||
|
|
laid to him for his ignorance of financial affairs, and his
|
|||
|
|
refusal to retain a business manager to see to those affairs.
|
|||
|
|
He spent money like water, money having no real value to him. He
|
|||
|
|
allowed people to purchase valuable patents outright instead of
|
|||
|
|
insisting on long term royalty agreements in addition to the lump
|
|||
|
|
sum payments, which would have insured some future income. Had he
|
|||
|
|
been monetarily wiser, he would not have died penniless, and many
|
|||
|
|
more ideas could have seen commercial application; even if the
|
|||
|
|
final marketing was done by others.
|
|||
|
|
|
|||
|
|
Have a good vacation, I look foward to hearing from you upon your
|
|||
|
|
return.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2006 Date: 12-17-93 20:35
|
|||
|
|
From: Ron Lawrence
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: Re: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
> BC>Do you connect the neon sign transformers in series or what?
|
|||
|
|
>
|
|||
|
|
> A combination - the transformers are 12kV at 30mA so I will
|
|||
|
|
> get 24kV at
|
|||
|
|
> 60mA by using four of them.
|
|||
|
|
|
|||
|
|
I'd be REALLY cautious about paralleling ANY non-precision transformers,
|
|||
|
|
and on neon light transformers, watch out for there being an internal,
|
|||
|
|
tied to case, center tap - lots of 'em are built that way. I about
|
|||
|
|
fried myself in junior high school due that grounded center tap!
|
|||
|
|
(When ya stack two in series for more volts, you can, and often do, get a
|
|||
|
|
massive flash-over to the AC input, and that 600v insulation just isn't
|
|||
|
|
adequate to keep it from further jumps!)
|
|||
|
|
|
|||
|
|
...RON...
|
|||
|
|
|
|||
|
|
-!- Opus-CBCS 1.73a
|
|||
|
|
! Origin: C C I B B S (509)663-8397 (1:344/58.0)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1947 Date: 12-18-93 01:15
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Patrick Kirol
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
PK> Richard I have been following your coiling discussions here
|
|||
|
|
PK> for some time and would like to get a copy of the video tape
|
|||
|
|
PK> you have and a copy of the Tesla coil information you posted
|
|||
|
|
PK> on this echo. I would also like to get your advice on which
|
|||
|
|
PK> coiling program you would recommend. I have noticed that
|
|||
|
|
PK> there are a couple different ones out there. I am mailing
|
|||
|
|
PK> out a tape and disk (and check) today.
|
|||
|
|
|
|||
|
|
You will love the tape if you are the slightest bit interested in
|
|||
|
|
coiling or other high voltage equipment. I run some hot stuff
|
|||
|
|
here. I will get your copy out within 48 hours of receipt of your
|
|||
|
|
package, but please allow a few extra days due to the holiday
|
|||
|
|
mails.
|
|||
|
|
|
|||
|
|
As for the coiling program I would recommend you purchase THE
|
|||
|
|
TESLA COIL DESIGNER by Walt Noon. This software is sold through
|
|||
|
|
several publishers and book dealers, but I can't find a catalog
|
|||
|
|
handy. However Walt would love to hear from you, and please tell
|
|||
|
|
him I provided you with his address (I owe him a letter).
|
|||
|
|
|
|||
|
|
Walt Noon
|
|||
|
|
3283 Belvedere
|
|||
|
|
Riverside, CA 92507
|
|||
|
|
|
|||
|
|
The software is pretty good but I really only use it for one
|
|||
|
|
purpose: it enables me to determine within tollerable limits the
|
|||
|
|
inductance and resonate frequency of the secondary coil, and the
|
|||
|
|
tank circuit frequency. Used intelligently this menu driven
|
|||
|
|
software will take simple U.S. physical measurements from a
|
|||
|
|
planned design and give you real working numbers as to
|
|||
|
|
operational frequency of the system, rough tuning, number of
|
|||
|
|
primary turns required, and the size of the capacitance and power
|
|||
|
|
supply needed. This will cut the hours and hours of time required
|
|||
|
|
with a calculator and book of tables and formulas... down to
|
|||
|
|
seconds. All of the required tables such as dielectric constants,
|
|||
|
|
line frequencies, toroid capacitances, etc. are already in the
|
|||
|
|
software. It is really just a matter of plug and chug.
|
|||
|
|
|
|||
|
|
The functions it covers includes nearly every major componet of
|
|||
|
|
the 1/4 wave Tesla coil; having calculators built in for
|
|||
|
|
capacitors, power supplies, tank circuit frequencies, discharge
|
|||
|
|
terminals, etc.. The only thing I will have to fault is the spark
|
|||
|
|
length calulator that the program uses, I frequently blow the
|
|||
|
|
programs estimated maximum disharge length away on my real
|
|||
|
|
systems. Walt tells me it is not the program, but the coiler (me)
|
|||
|
|
who is at fault. <BIG grin>
|
|||
|
|
|
|||
|
|
Combined with the practical information presented on the video
|
|||
|
|
tape, copies of this thread, and some of my spark gap designs I
|
|||
|
|
will include on the disk, you will have a wealth of accurate
|
|||
|
|
coiling information. As always, I am available here to answer
|
|||
|
|
questions, offer advice, and can trouble shoot any problems you
|
|||
|
|
may encounter. Good Luck!!!
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2000 Date: 12-18-93 23:44
|
|||
|
|
From: Robert Holtz
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Well,
|
|||
|
|
|
|||
|
|
After reading whats been going on in the conference between yourself
|
|||
|
|
and the other members I'm pleased to see a dialog develop. Thank
|
|||
|
|
for letting me know it was productive >;-)
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b From small chips to big breasts, silicone is the best
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2145 Date: 12-19-93 11:08
|
|||
|
|
From: Robert Taylor
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: Re: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> Quoting Richard Quick to Robert Taylor <=-
|
|||
|
|
|
|||
|
|
RQ> Yes I did. I take it then you missed my reply.
|
|||
|
|
|
|||
|
|
Looks like you're right. I think the BBS that I picked you up on
|
|||
|
|
was having some problems around that time, so end of mystery.
|
|||
|
|
|
|||
|
|
RQ> I own a copy, and a copy of nearly everything else worthy of
|
|||
|
|
RQ> note on the subject.
|
|||
|
|
|
|||
|
|
Guess I shoulda known better on that one! You must have one
|
|||
|
|
heckuva Tesla library.
|
|||
|
|
|
|||
|
|
RQ> intended to become public. This private material, when
|
|||
|
|
RQ> combined with his patents and patent applications, reveals
|
|||
|
|
RQ> much larger plans.
|
|||
|
|
|
|||
|
|
I can only imagine how interesting some of this material must be.
|
|||
|
|
I was aware of some Hungarian translation of his private papers
|
|||
|
|
was out there, but have never seen a copy of same.
|
|||
|
|
|
|||
|
|
Just out of curiosity, are you familiar with anything regarding
|
|||
|
|
Tesla's connection with the "project invisibility" & the U.S.S.
|
|||
|
|
Eldridge? Ran across something that connected him with the
|
|||
|
|
project, but everything that I've seen is vague. An impression
|
|||
|
|
was left that he may have had something to do with the building
|
|||
|
|
of the alleged field-generator.
|
|||
|
|
|
|||
|
|
BTW--did catch your reply on my post about Ken Strickfadden. His
|
|||
|
|
work always amazed me.
|
|||
|
|
|
|||
|
|
Seasons Greetings & Happy Holidays.
|
|||
|
|
|
|||
|
|
... C:\\DOS C:\\DOS\\RUN RUN\\DOS\\RUN WATCH\\DOS\\CRASH
|
|||
|
|
|
|||
|
|
! Origin: BLUFF CITY BBS (1:123/70)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2 Date: 20 Dec 93 01:30:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Brian Carling
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
BC> Yes, unfortunately I missed many of the earlier posts...
|
|||
|
|
BC> what is the capacitor for? What is it like?
|
|||
|
|
|
|||
|
|
Capacitance is required in the tank circuit to convert line
|
|||
|
|
frequency power into RF (radio frequency) pulses. It works like
|
|||
|
|
this:
|
|||
|
|
|
|||
|
|
A capacitor designed to discharge in a pulse, and able to
|
|||
|
|
withstand high voltage, is charged with the power supply xfrmr.
|
|||
|
|
The power supply xfrmr usually puts out a high voltage (6-20kv).
|
|||
|
|
Since you are stepping up your line voltage (120/240) with a
|
|||
|
|
transformer, your output current gets smaller as the output
|
|||
|
|
voltage gets higher. So if you are using neon sign xfrmrs, say
|
|||
|
|
12,000 volt 30 millamp output units, your input current is high,
|
|||
|
|
say 3 amps (if the transformer is power factor corrected). Your
|
|||
|
|
output is a measly .03 amps.
|
|||
|
|
|
|||
|
|
Not much power here, only 360 watts. But if you take that .03
|
|||
|
|
amps (@12kv) and charge up a capacitor with it, how many watts
|
|||
|
|
will you get if you discharge the capacitor? That will depend on
|
|||
|
|
how fast you drain the cap. Lets say you short the cap out and
|
|||
|
|
pulse discharge it. Currents in the order of a few dozen amps are
|
|||
|
|
easily obtained this way.
|
|||
|
|
|
|||
|
|
Now if you match the size of the capacitor to the amount of
|
|||
|
|
energy produced by the HV power supply in 1/2 of a 60 cycle wave
|
|||
|
|
(the + polarity, then the - polarity) you will be able to fully
|
|||
|
|
charge the cap in 1/2 cycle. In the common case with a power
|
|||
|
|
supply at 60 cycle, then you can fully charge the cap 120 times
|
|||
|
|
per second.
|
|||
|
|
|
|||
|
|
Instead of just shorting the cap out with a wire or buss bar,
|
|||
|
|
let's discharge the cap through a heavy, low impedance coil. In
|
|||
|
|
order to properly time the discharge so that the cap fires only
|
|||
|
|
when fully charged, we need some type of high voltage switch.
|
|||
|
|
The switch commonly used is an air gap, or spark gap. When the
|
|||
|
|
capacitor is charging it is receiving energy, as it recieves
|
|||
|
|
energy there is current flow from the power supply. The more
|
|||
|
|
cuurent flowing, the more depressed the circuit voltage becomes.
|
|||
|
|
This is voltage drop, the input energy is limited, the current is
|
|||
|
|
high, so the voltage must be low. As the capacitor charges the
|
|||
|
|
voltage rises, until there is no more current flow. When current
|
|||
|
|
stops flowing into the cap (fully charged), the voltage peaks,
|
|||
|
|
and the spark jumps the gap.
|
|||
|
|
|
|||
|
|
This spark (arc actually) discharges the capacitor very quickly.
|
|||
|
|
Once the energy of the discharge is used, the spark gap opens up,
|
|||
|
|
and the capacitor is free again to recharge from the power
|
|||
|
|
supply.
|
|||
|
|
|
|||
|
|
One interesting property of capacitive discharge through a
|
|||
|
|
conductor is oscillation. During the discharging of a capacitor
|
|||
|
|
in a circuit such as this the pulse of energy actually swings
|
|||
|
|
back and forth from one capacitor plate to another until the
|
|||
|
|
energy is consumed. The frequency of oscillation changes
|
|||
|
|
according to the size of the capacitor, and the length of the
|
|||
|
|
conductor. Large capacitors slow the frequency of oscillation, as
|
|||
|
|
due long conductors. The frequency of a typical Tesla tank
|
|||
|
|
circuit (capacitor & heavy coil) typically range from 1 mHz on
|
|||
|
|
the high end to say 20-30 kHz on the low end.
|
|||
|
|
|
|||
|
|
The peak currents and voltage seen in the heavy primary coil are
|
|||
|
|
a function of the capacitor and power supply. The circuit is
|
|||
|
|
designed to deliver a maximum of voltage and current over a very
|
|||
|
|
short period of time. Peak powers in this circuit may reach many
|
|||
|
|
megawatts with relative ease, due to the capacitve discharge.
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2102 Date: 12-20-93 01:42
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Patrick Kirol
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
Patrick,
|
|||
|
|
|
|||
|
|
I got your Tesla video tape request in the mail today. The
|
|||
|
|
archives, GIF schematics, and many pages of notes are on the
|
|||
|
|
disk. The tape is full up. I will return mail the tape and disk
|
|||
|
|
first thing tomorrow. Good luck, and if you get a coil up and
|
|||
|
|
running please tell us about it.
|
|||
|
|
|
|||
|
|
As I have stated here before: if you have any questions or
|
|||
|
|
comments about the video, please feel free to post here. I would
|
|||
|
|
love to hear from you.
|
|||
|
|
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2103 Date: 12-20-93 03:24
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Ron Lawrence
|
|||
|
|
Subj: Re: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
> BC>Do you connect the neon sign transformers in series or
|
|||
|
|
> what?
|
|||
|
|
|
|||
|
|
> A combination - the transformers are 12kV at 30mA so I will
|
|||
|
|
> get 24kV at 60mA by using four of them.
|
|||
|
|
|
|||
|
|
RL> I'd be REALLY cautious about paralleling ANY non-precision
|
|||
|
|
RL> transformers.
|
|||
|
|
|
|||
|
|
Running these xfrmrs in parallel is really no problem at all. I
|
|||
|
|
do it all the time on really LARGE banked power supplies (over 4
|
|||
|
|
killowatts from 360 watt neons) and have never had a problem.
|
|||
|
|
Good high voltage technique requires some bypassing caps, and a
|
|||
|
|
safety spark gap with center tap ground to protect the power
|
|||
|
|
supply from kickback, flashover, burnout, etc.. With a little
|
|||
|
|
technique a parallel bank will hold up quite a while without
|
|||
|
|
failure. Even without much protection beyond a safety gap, they
|
|||
|
|
will still hold up for hours of high voltage fun.
|
|||
|
|
|
|||
|
|
The ease in paralleling these particular type xfrmrs is from the
|
|||
|
|
magnetic leakage core shunts. The internal shunting is very
|
|||
|
|
forgiving to load imbalances.
|
|||
|
|
|
|||
|
|
I posted both Dave and Brian about attempting to run these units
|
|||
|
|
with the secondaries in series. This could be a bad scene if one
|
|||
|
|
of the secondaries were to open, and the case and core were to
|
|||
|
|
pick up 6 kv or so.
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2101 Date: 12-20-93 09:30
|
|||
|
|
From: Robert Holtz
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-> As our local co-sysop, and an eyewitness to both some of my
|
|||
|
|
-> working systems, and the video records, would you care to state
|
|||
|
|
-> an opinion? I know you too have shown some of the video to
|
|||
|
|
-> others. Any comments?
|
|||
|
|
|
|||
|
|
A far as stating an opinion goes I'd say it's impressive to say the
|
|||
|
|
least. Since I have only seen one machine spewing forth 15 foot
|
|||
|
|
lightning bolts is hard to do a comparison.
|
|||
|
|
|
|||
|
|
When showing the tape to other people it's hard to convince them that
|
|||
|
|
someone is actully doing this in their basement somewhere in the
|
|||
|
|
suburbs. :-)
|
|||
|
|
|
|||
|
|
cya
|
|||
|
|
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2148 Date: 12-21-93 14:03
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Robert Taylor
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Regarding: The Inventions, Writing, and Research of Nickola Tesla
|
|||
|
|
available from Barnes & Noble Booksellers
|
|||
|
|
|
|||
|
|
RQ> I own a copy, and a copy of nearly everything else worthy of
|
|||
|
|
RQ> note on the subject.
|
|||
|
|
|
|||
|
|
RT> Guess I shoulda known better on that one! You must have one
|
|||
|
|
RT> heckuva Tesla library.
|
|||
|
|
|
|||
|
|
Over 200 separate covers at this time. A lot of the material I
|
|||
|
|
have read two, three, even four times looking for clues.
|
|||
|
|
|
|||
|
|
RT> I can only imagine how interesting some of this material
|
|||
|
|
RT> must be. I was aware of some Hungarian translation of his
|
|||
|
|
RT> private papers was out there, but have never seen a copy of
|
|||
|
|
RT> same.
|
|||
|
|
|
|||
|
|
I believe the book you are referring to is the Colorado Springs
|
|||
|
|
Notes, which were hand written in english in 1899-1900. These
|
|||
|
|
papers and many others were processed by the Office of Alien
|
|||
|
|
Affairs at the time of Telsa's death (though he was a full
|
|||
|
|
citizen...). Telsa had no relatives in this country. Before his
|
|||
|
|
death the Yugoslavian government had declared him a national hero
|
|||
|
|
(while we were busy starving him). When the Yugoslavs found that
|
|||
|
|
he was completely destitute, they set up a trust fund to see that
|
|||
|
|
he received a monthly check to cover his food and rent. It was
|
|||
|
|
all he had when he died. Since the Yugoslavian government was
|
|||
|
|
taking responsibility for his care, the U.S. government declared
|
|||
|
|
Yugoslavia the next of kin. The personal effects found in his
|
|||
|
|
hotel room were pilfered (many valuable items were stolen), and
|
|||
|
|
what remained were sent to Belgrade where they were placed in a
|
|||
|
|
museum.
|
|||
|
|
|
|||
|
|
In the mid 1970's the curator of the Telsa Museum in Belgrade
|
|||
|
|
cataloged all of the papers written by Tesla in Colorado Springs.
|
|||
|
|
About this time "pilgrams" such as Robert Golka began showing up
|
|||
|
|
at the museum to read the originals. The curator decided to
|
|||
|
|
publish through NOLIT of Belgrade, and copies were made available
|
|||
|
|
in the U.S. for around $45.00 for a beautiful gold leaf, leather
|
|||
|
|
bound edition. Today my copy is worth over $100.00. The book has
|
|||
|
|
reprints of most of the surviving photos Tesla took of the lab,
|
|||
|
|
it's contents, and some of the experiments performed there.
|
|||
|
|
|
|||
|
|
It should be noted that Tesla was very proud of his U.S.
|
|||
|
|
Citizenship. He spoke five languages fluently, but english was
|
|||
|
|
his mother tongue. All of his patents, articles, and interviews
|
|||
|
|
were conducted in english, and all of his notes were in english.
|
|||
|
|
|
|||
|
|
RT> Just out of curiosity, are you familiar with anything
|
|||
|
|
RT> regarding Tesla's connection with the "project invisibility"
|
|||
|
|
RT> & the U.S.S. Eldridge? Ran across something that connected
|
|||
|
|
RT> him with the project, but everything that I've seen is
|
|||
|
|
RT> vague. An impression was left that he may have had something
|
|||
|
|
RT> to do with the building of the alleged field-generator.
|
|||
|
|
|
|||
|
|
This area would most definately fall under the protection of
|
|||
|
|
National Security interests, and as such would be highly
|
|||
|
|
classified if the project did in fact take place. I have never
|
|||
|
|
seen any concrete proof of this project or Tesla's involvement.
|
|||
|
|
|
|||
|
|
But that does not stop the stories and conspiracy theorys. I have
|
|||
|
|
heard more than a few. I cannot say if any of this is worthy of
|
|||
|
|
believing or not, as I base my information on facts not hearsay.
|
|||
|
|
Nobody to my knowledge has presented verifiable facts on this.
|
|||
|
|
|
|||
|
|
But it is a fact that to this day the U.S. government has a Top
|
|||
|
|
Secret classified archive in Washington D.C. which contains the
|
|||
|
|
bulk of papers Tesla wrote in his later years. Some of these
|
|||
|
|
papers are believed to have orginated from his hotel room, but
|
|||
|
|
the bulk of these papers (many boxes) were removed by the Office
|
|||
|
|
of Alien Affairs from his rented storage room. They were not
|
|||
|
|
turned over to the Yugoslavian government because they were not
|
|||
|
|
considered to be "personal effects". It is my understanding that
|
|||
|
|
these papers concern Tesla's particle beam weapon plans, and more
|
|||
|
|
likely than not the field generator plans if they do exist.
|
|||
|
|
|
|||
|
|
As I have stated, the existence of the archive has been
|
|||
|
|
established, as well as the fact that many unpublished documents
|
|||
|
|
written by Tesla reside there. The exact catalog of documents is
|
|||
|
|
a mystery. It is interesting to note that 50 years after Tesla's
|
|||
|
|
death, the U.S. government still considers these documents to be
|
|||
|
|
of the gravest concern to national security.
|
|||
|
|
|
|||
|
|
Related filings under the Freedom of Information act has revealed
|
|||
|
|
clues on some of these documents. It is a known fact that the
|
|||
|
|
powerhead design for a coil driven particle beam weapon resides
|
|||
|
|
there. This powerhead was a vacuum tube open to the air at one
|
|||
|
|
end. Vacuum was maintained at one end of the tube by using a
|
|||
|
|
vortex of compressed air, so the tube geometries are similar to
|
|||
|
|
an aspirator pump. The tube contained a standard capacitive
|
|||
|
|
discharge rail gun at the low pressure end which produced and
|
|||
|
|
accelerated metal plasma. The main system energy was given to the
|
|||
|
|
plasma from a large Magnifier system (believed) which provided
|
|||
|
|
voltage to further accelerate the plasma to near light speeds
|
|||
|
|
over a very short distance. I have seen reproductions of original
|
|||
|
|
unpublished sketches that Tesla made of this powerhead that were
|
|||
|
|
included with his papers sent to Belgrade, and brought to light
|
|||
|
|
by one of the "pilgrams" returning in the late 1970's. I have no
|
|||
|
|
doubt as to the the authenticity of the information I saw, as
|
|||
|
|
there was a representive of the museum in attendance when the
|
|||
|
|
sketches were viewed and discussed, and the reproduction bore the
|
|||
|
|
identical museum authenticity stamp that my published copy
|
|||
|
|
of the Colorado Springs Notes bears.
|
|||
|
|
|
|||
|
|
Back to your subject of "project invisiblity", I have heard
|
|||
|
|
nothing but rumors. I heard a guy a couple of years back who
|
|||
|
|
claimed to have seen Tesla at White Sands early in the war
|
|||
|
|
working on a classified military project. This story could not be
|
|||
|
|
verified, and the teller offered no proof. Good story though.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2431 Date: 12-28-93 05:56
|
|||
|
|
From: Patrick Kirol
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: Re: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> Quoting Richard Quick to Patrick Kirol <=-
|
|||
|
|
|
|||
|
|
RQ> In case you missed my post yesterday that included
|
|||
|
|
information on the coiling software that you inquired about
|
|||
|
|
|
|||
|
|
earlier here is a brief recap:
|
|||
|
|
|
|||
|
|
RQ> Tesla Book Company, P.O. Box 121873, Chula Vista, CA.
|
|||
|
|
RQ> 91912. They have a 1-800-398-2056 information, catalog, and
|
|||
|
|
|
|||
|
|
RQ> ordering service.
|
|||
|
|
|
|||
|
|
Richard, I received your tape and disk today in the mail,...
|
|||
|
|
WOW that thing packs a wallop! Makes me want to go out and get
|
|||
|
|
to work on building a couple of your caps and getting things
|
|||
|
|
cracking! You could work out the rough edges and turn it into a
|
|||
|
|
"how to" film or maby a "school demonstration" film for
|
|||
|
|
HS/College level physics classes. Have you received any requests
|
|||
|
|
for coils to power other devices, lasers etc.? I realy think you
|
|||
|
|
should package the tape and some instructions into a how to thing
|
|||
|
|
for beginners. I was wondering about the shape/path that the
|
|||
|
|
sparks take esp the ground strikes. Are they in some way an
|
|||
|
|
expression of the way the charge is stacked up on the secondary?
|
|||
|
|
When you run the coil outside does wind have any effect on where
|
|||
|
|
the coil strikes?
|
|||
|
|
|
|||
|
|
I realize from your discussion that my coil lacked so many
|
|||
|
|
things, notably a regulated power input, adequate tank circut,
|
|||
|
|
grounding, dimensions I had about 70 ft #10 coper wire as a
|
|||
|
|
primary, 1500 feet of secondary on a 2.5 inch pipe (that stood
|
|||
|
|
too tall from the primary). I had no way to measure if I was
|
|||
|
|
getting anything off the secondary, the neon lights were a good
|
|||
|
|
idea. I will read through your disk files and try again. Thanks
|
|||
|
|
for your time. My dad would have loved your garage setup. Don't
|
|||
|
|
melt any nails!
|
|||
|
|
|
|||
|
|
Pat Kirol (also on the net Patrick Kirol@lambada.oit.unc.edu)
|
|||
|
|
`
|
|||
|
|
-!- Blue Wave/Max v2.12
|
|||
|
|
! Origin: The Federal Post -{*}- Spring-Lake, NC (1:3634/2)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 28 Dec 93 12:51:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Well I hope everyone had a happy holiday. I am now recovered
|
|||
|
|
enough to post some more specific info on Magnifier construction
|
|||
|
|
and operation. I have covered some general material on this
|
|||
|
|
revolutionary Tesla coil system, but will now endeavor to throw
|
|||
|
|
out some specific pointers for those of you who have an interest
|
|||
|
|
in this much more efficient RF power processor.
|
|||
|
|
|
|||
|
|
As I have mentioned the Magnifier is a three coil system. The
|
|||
|
|
primary is excited from a Tesla tank circuit, the secondary coil
|
|||
|
|
is inductively coupled to the primary, and the extra coil is top
|
|||
|
|
loaded on the secondary in such a fashion as to be uncoupled
|
|||
|
|
completely from the primary/secondary "driver" coils. The extra
|
|||
|
|
coil is base fed by transmission line, which can be anything from
|
|||
|
|
Litz wire, copper pipe, or heavy DC transmission wire.
|
|||
|
|
|
|||
|
|
The keys to getting an efficient Magnifier setup in operation can
|
|||
|
|
be listed fairly easily: Close coupling between primary and
|
|||
|
|
secondary, good gap quenching, and proper impedances in the
|
|||
|
|
secondary driver and the extra coil.
|
|||
|
|
|
|||
|
|
Coupling in Tesla magnifiers must be tight. Classic style
|
|||
|
|
vertical helix primaries are very practical for use in Magnifier
|
|||
|
|
systems, but heavy insulation between the coils must be used to
|
|||
|
|
prevent flashover. The close coupling reduces somewhat the VSWR
|
|||
|
|
in the driver secondary, and the 1/8th wave output contains
|
|||
|
|
substantially less voltage than a normal 1/4 wave Tesla system,
|
|||
|
|
but the close physical proximity between coils means flashover
|
|||
|
|
will be a problem. Use several layers of polyethylene plastic
|
|||
|
|
around the secondary, and insulate the top primary turns with
|
|||
|
|
heavy vinyl hose. It has come to my attention that tapping the
|
|||
|
|
primary coil from the bottom turns, and heavily insulating the
|
|||
|
|
top turns, reduces flashover. (now gee, why didn't I think of
|
|||
|
|
that?)
|
|||
|
|
|
|||
|
|
Good gap quenching is a must. Because the coupling is so much
|
|||
|
|
tighter in Magnifier systems, more strain is put on the main
|
|||
|
|
system spark gap. If ever there was a need for exotic spark gap
|
|||
|
|
systems this is it. Quench times must be low, low, low, in order
|
|||
|
|
to trap the maximum energy into the secondary driver. An un-
|
|||
|
|
quenched (closed) gap will allow energy in the secondary back
|
|||
|
|
into the primary/tank circuit. This must be prevented. In
|
|||
|
|
Colorado Springs, Tesla used a pair of air blast gaps in series
|
|||
|
|
with a massive rotary. He kept pushing his line frequency higher
|
|||
|
|
(he had a massive, variable speed alternator in the lab),
|
|||
|
|
increased his break rate (up to 50,000 bps) and kept the energy
|
|||
|
|
delivered per pulse down to a minimum. The reason he strove to
|
|||
|
|
keep the energy per break down was to prevent overloading his
|
|||
|
|
gaps. As energy per break (voltage * current) increases, quench
|
|||
|
|
times decrease and efficiency in the Magnifier drop off. The
|
|||
|
|
increase in the number of breaks per second allowed the total
|
|||
|
|
energy processed to climb to unheard of levels, with unheard of
|
|||
|
|
performance and efficiency.
|
|||
|
|
|
|||
|
|
The next key point to building and operating a small to medium
|
|||
|
|
Tesla Magnifier is proper coil impedances in the secondary driver
|
|||
|
|
and extra coil. The extra coil must have a higher impedance than
|
|||
|
|
the secondary driver. The extra coil must be lower in resonate
|
|||
|
|
frequency.
|
|||
|
|
|
|||
|
|
I have mentioned here that the 1/8th harmonic output of the
|
|||
|
|
secondary driver coil matching the natural 1/4 wave resonate
|
|||
|
|
frequency of the extra coil is the most efficient mode of
|
|||
|
|
Magnifier operation. This is true, but don't get bogged down with
|
|||
|
|
it. This system will work and fire (within reasonable limits)
|
|||
|
|
with any extra coil that has a higher impedance and inductance
|
|||
|
|
that the driver secondary. Let me give some tips.
|
|||
|
|
|
|||
|
|
I have found that most high performance 1/4 wave secondary coils
|
|||
|
|
make lousy driver secondary coils in the Tesla Magnifier. The
|
|||
|
|
reason is the impedance and inductance are too high, and the 1/4
|
|||
|
|
wave coil is not designed or constructed to handle high current
|
|||
|
|
outputs. 1/4 wave coils built per my instructions (posted here
|
|||
|
|
several times) are designed to produce excellent 1/4 wave voltage
|
|||
|
|
peaks, not 1/8th wave current. Your best bet is to wind a special
|
|||
|
|
coil for use as a driver. With this in mind what type of coil
|
|||
|
|
design would work best? Well my first decent driver coil was
|
|||
|
|
built for use as a 1/4 wave resonator, but it dropped into the
|
|||
|
|
role of a Magnifier driver without complaint; it had a a nice low
|
|||
|
|
aspect ratio, and it was wound with heavy stranded wire...
|
|||
|
|
|
|||
|
|
A good general purpose Magnifier secondary has a very low aspect
|
|||
|
|
ratio for good tight coupling over the entire winding length (say
|
|||
|
|
about 1.5:1). It is wound with heavy stranded insulated wire (say
|
|||
|
|
#18 or larger) to help carry heavy RF currents with lower losses.
|
|||
|
|
The frequency of the coil should not be too low, say in the area
|
|||
|
|
of 400 kHz for most medium systems.
|
|||
|
|
|
|||
|
|
For the extra coil you want to pack a lot of inductance into a
|
|||
|
|
small unit volume, but not too much. You will end up with an
|
|||
|
|
amazingly short resonating coil if this is done properly. Use a
|
|||
|
|
6" or 8" coil form with an aspect ratio a little over 2:1. For
|
|||
|
|
winding the coil use say #20 -#24 double Formvar magnet wire. The
|
|||
|
|
extra coil must be heavily top loaded with toroid discharger in
|
|||
|
|
order to produce really killer performance, as is the case when
|
|||
|
|
pumping a lot of energy through any magnet wire coil. The
|
|||
|
|
impedance in the bare extra coil must be higher than the driver
|
|||
|
|
coil by some margin, and the frequency of the extra coil should
|
|||
|
|
be brought down around 200 kHz by top loading the coil with
|
|||
|
|
discharger. The impedance of the driver must be low (heavy
|
|||
|
|
stranded wire spaced by insulation) while the impedance of the
|
|||
|
|
extra coil must be high (thin magnet wire, close wound turns)
|
|||
|
|
|
|||
|
|
The tank circuit of the Magnifier must be tuned to the same
|
|||
|
|
frequency as the extra coil with discharger. Set the driver
|
|||
|
|
secondary inside the primary and run a transmission line some 6-
|
|||
|
|
8' to the extra coil. The extra coil must be away from any
|
|||
|
|
field damping effects such as ground, large metal objects, other
|
|||
|
|
coils etc. It must be allowed to resonate as freely as possible.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2 Date: 30 Dec 93 11:08:24
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Patrick Kirol
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
PK> Richard, I received your tape and disk today in the mail,...
|
|||
|
|
PK> WOW that thing packs a wallop!
|
|||
|
|
|
|||
|
|
Nobody who has seen the video will argue with you. Peak powers of
|
|||
|
|
22 megawatts in a spark discharge look VERY impressive. Nobody
|
|||
|
|
who has sent for the tape has asked for their $10.00 back either.
|
|||
|
|
<grin>
|
|||
|
|
|
|||
|
|
PK> Makes me want to go out and get to work on building a couple
|
|||
|
|
PK> of your caps and getting things cracking!
|
|||
|
|
|
|||
|
|
Go for it!
|
|||
|
|
|
|||
|
|
PK> Have you received any requests for coils to power other
|
|||
|
|
PK> devices, lasers etc.?
|
|||
|
|
|
|||
|
|
Very few people out there believe it can be done, and even fewer
|
|||
|
|
are doing ANY research at all into these areas. One of the
|
|||
|
|
problems with the standard 1/4 wave systems featured on your copy
|
|||
|
|
of the video is that the impedance of the output is too high for
|
|||
|
|
powering lasers etc. directly. However the Tesla Magnifier
|
|||
|
|
circuit offers the means to increase the processing efficiency,
|
|||
|
|
decrease the impedance, and generate still greater peak powers.
|
|||
|
|
This is the direction the research must go.
|
|||
|
|
|
|||
|
|
PK> I realy think you should package the tape and some
|
|||
|
|
PK> instructions into a how to thing for beginners.
|
|||
|
|
|
|||
|
|
I have thought about it, but as of yet have not done anything in
|
|||
|
|
this direction. The tape clearly shows it CAN be done, and I have
|
|||
|
|
been surprised with the number of respondents who built coils but
|
|||
|
|
could not get spark. With the information on the tape, the
|
|||
|
|
archives from this thread, and my availability here to answer
|
|||
|
|
questions, it should be possible to get a foot up into this very
|
|||
|
|
interesting (and neglected) area of RF power processing.
|
|||
|
|
|
|||
|
|
PK> I was wondering about the shape/path that the sparks take
|
|||
|
|
PK> esp the ground strikes. Are they in some way an
|
|||
|
|
PK> expression of the way the charge is stacked up on the
|
|||
|
|
PK> secondary?
|
|||
|
|
|
|||
|
|
I assume you are talking about strikes from the discharge
|
|||
|
|
terminal to the strike rail protecting the primary coil. The
|
|||
|
|
frequency of strikes to the grounded rail was partly my fault.
|
|||
|
|
The toroid discharge terminal needs to be lifted higher off the
|
|||
|
|
secondary as the diameter of the toroid grows. The last few runs
|
|||
|
|
show the coil operating with the toroid at less than optimium
|
|||
|
|
height. Had it been set higher the spark would tend to strike the
|
|||
|
|
ground rail less. The spark is caught up in the field flux
|
|||
|
|
interaction between primary and secondary and is following the
|
|||
|
|
lines of magnetic force in this field. Once they get away from
|
|||
|
|
the field however I assume they are pretty much random, hitting
|
|||
|
|
everything within striking distance, which is at least 11 feet in
|
|||
|
|
this instance.
|
|||
|
|
|
|||
|
|
PK> When you run the coil outside does wind have any effect on
|
|||
|
|
PK> where the coil strikes?
|
|||
|
|
|
|||
|
|
Most definately. Weather conditions outside bear a lot on the
|
|||
|
|
coil performance. Wind will blow sparks all over, and will cause
|
|||
|
|
the system tune to vary. A corona cloud forms around the toroid
|
|||
|
|
as a result of the megavoltages present. With discharge present
|
|||
|
|
you cannot see this with the naked eye or on video, but time
|
|||
|
|
still photography will show the cloud clearly present. The effect
|
|||
|
|
is very pronounced when using small toriods at high power. This
|
|||
|
|
corona cloud affects the system by acting as a larger discharger,
|
|||
|
|
increasing the capacity of the toroid, and lowering the resonate
|
|||
|
|
frequency of the secondary. When wind blows it removes the ions,
|
|||
|
|
and the secondary tune seems to jump up and down with the gusts.
|
|||
|
|
I have had circuit failures that I believe were caused by this
|
|||
|
|
wild, wind induced, frequency changes, but my eyes never saw
|
|||
|
|
anything like the spark writhing around in the wind.
|
|||
|
|
|
|||
|
|
PK> I realize from your discussion that my coil lacked so many
|
|||
|
|
PK> things, notably a regulated power input, adequate tank
|
|||
|
|
PK> circut, grounding, dimensions I had about 70 ft #10 coper
|
|||
|
|
PK> wire as a primary, 1500 feet of secondary on a 2.5 inch pipe
|
|||
|
|
PK> (that stood too tall from the primary). I had no way to
|
|||
|
|
PK> measure if I was getting anything off the secondary, the
|
|||
|
|
PK> neon lights were a good idea. I will read through your disk
|
|||
|
|
PK> files and try again. Thanks for your time. My dad would
|
|||
|
|
PK> have loved your garage setup. Don't melt any nails!
|
|||
|
|
|
|||
|
|
Well it should be pretty clear now, and you have the most up to
|
|||
|
|
date and comprehensive information on 1/4 wave Telsa coils
|
|||
|
|
available anywhere to the best of my knowledge. Take your time
|
|||
|
|
and look over all of the text files I sent, look at the spark gap
|
|||
|
|
schematics, look at the video. I have hidden nothing; it's all
|
|||
|
|
there. If you have any questions or comments just post me, I will
|
|||
|
|
be more than happy to answer.
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 30 Dec 93 16:41:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: All
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
For the beginner:
|
|||
|
|
|
|||
|
|
The best sized coil system for those of you who are interested in
|
|||
|
|
building your first really "hot" Tesla coil is based on a 6"
|
|||
|
|
diameter secondary coil. A coil this size runs very well at 1500
|
|||
|
|
watts and can be driven to 2000 watts without much problem. Spark
|
|||
|
|
lengths of 55-60" can be easily obtained with such a coil.
|
|||
|
|
|
|||
|
|
The parts for a unit like this can typically be accumulated for
|
|||
|
|
around $150.00 as I have posted before. Figure your designing and
|
|||
|
|
construction time will run from 40 to 80 hours depending on the
|
|||
|
|
shop facilities available.
|
|||
|
|
|
|||
|
|
Most people who build a coil do not go on to design and build a
|
|||
|
|
second unit. The reason for this being that the first effort more
|
|||
|
|
often than not fails to work as the designer/builder had hoped,
|
|||
|
|
and the project gets relegated to a dusty corner somewhere.
|
|||
|
|
|
|||
|
|
I lay blame for this on coil plans and designs advertized,
|
|||
|
|
published, or sold in the last 20 years that were based on plans
|
|||
|
|
and designs popularized in the 1920s and 30s. These plans made
|
|||
|
|
use of what I call "classic" coil componets, which includes: long
|
|||
|
|
skinny secondary coils with space wound or insulated wire
|
|||
|
|
windings, plate glass capacitors, solid copper wire primaries,
|
|||
|
|
needle type spark gaps, and small sphere or knob type
|
|||
|
|
dischargers. "Classic" coils of this type are miserable
|
|||
|
|
performers frequently using unsafe tank circuits and grounding
|
|||
|
|
techniques. The prevalence of these coil designs persists to the
|
|||
|
|
present day and are responsible for many a budding coiler to quit
|
|||
|
|
in disgust after getting nothing but a nasty shock or two from
|
|||
|
|
what was advertized as a clean RF spark output from the
|
|||
|
|
secondary. That is if they got even that.
|
|||
|
|
|
|||
|
|
My first coil was a huge effort to build while I was in high
|
|||
|
|
school. The plans for the coil came mail order from a company
|
|||
|
|
that advertized in the back of Popular Science some years back,
|
|||
|
|
and was plagued with every possible design fault I listed above.
|
|||
|
|
I never was able to get a single spark from the discharge
|
|||
|
|
terminal. I thought "performance" Tesla coils were nothing but a
|
|||
|
|
myth, and felt I had been taken in by a dream.
|
|||
|
|
|
|||
|
|
Years later I bought another set of plans, and had similar
|
|||
|
|
results. But I associated myself with a group of people who were
|
|||
|
|
intent on bringing the 1/4 wave Tesla coil and the Tesla
|
|||
|
|
Magnifier out of the pages of history and into current practice.
|
|||
|
|
As a result of many many hours winding coils, building
|
|||
|
|
capacitors, and researching Tesla's original notes, I am happy to
|
|||
|
|
report sucess in bringing the Tesla coil into the 1990s. It is
|
|||
|
|
efficient, inexpensive, and capable of enormous peak powers off
|
|||
|
|
the discharge terminal. The modern design "reinvented" by trial
|
|||
|
|
and error is a very worthwhile project for anyone interested in
|
|||
|
|
high voltage or high energy RF.
|
|||
|
|
|
|||
|
|
Since October I have been posting information and answering
|
|||
|
|
questions regarding coiling, and the modern designs that we have
|
|||
|
|
evolved from Tesla's original work. I have recieved many positive
|
|||
|
|
responses from regulars in this conference regarding my work, and
|
|||
|
|
have done my best to "set the record straight" regarding Nickola
|
|||
|
|
Tesla and his place in history. Much of the information regarding
|
|||
|
|
the coils themselves has appeared in print here for the first
|
|||
|
|
time, and my posts have added up to over 100 pages on this
|
|||
|
|
subject.
|
|||
|
|
|
|||
|
|
So I guess what I am saying is: If you have built a coil, or you
|
|||
|
|
are thinking about building a coil, grab the archives from this
|
|||
|
|
thread. If you can't build a really hot coil system from the
|
|||
|
|
information that has been released here, you never will.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 3 Date: 03 Jan 94 13:31:24
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Damian Wright
|
|||
|
|
Subj: Re: big magnetic pulse
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
JA> I'd like some ideas on generating a LARGE magnetic pulse or
|
|||
|
|
JA> field.
|
|||
|
|
|
|||
|
|
DW> This'll create a magnetic pulse, don't know how big though,
|
|||
|
|
DW> it's a Tesla coil, (with lots of copper wire), it's not too
|
|||
|
|
DW> dangerous, it only kicks out about 40000Volts, but at a
|
|||
|
|
DW> pretty low A of course, if you're interested drop me a line
|
|||
|
|
DW> and I'll post the article I read on it up here on this net.
|
|||
|
|
|
|||
|
|
I have been posting on high powered Tesla systems in this
|
|||
|
|
conference for some time.
|
|||
|
|
|
|||
|
|
The Tesla Tank circuit is the pulse field generator. It uses a
|
|||
|
|
spark gap switch to pulse discharge a HV cap through a large
|
|||
|
|
coil. The EMFs produced are incredible as peak powers in this
|
|||
|
|
circuit can easily reach many megawatts. My largest Tesla system
|
|||
|
|
has peak powers of 22+ megawatts and will light florescent bulbs
|
|||
|
|
at 50-60' without any wire connections to the tube. It will erase
|
|||
|
|
bank and credit card magnetic strips at a few yards, and is
|
|||
|
|
lethal to digital circuits (watches, calulators, etc.) at a
|
|||
|
|
similar range.
|
|||
|
|
|
|||
|
|
You do not need a secondary resonating coil (Tesla coil)
|
|||
|
|
inductively coupled to the tank circuit, the tank circuit is
|
|||
|
|
actually more effective alone than when coupled to the secondary
|
|||
|
|
resonator.
|
|||
|
|
|
|||
|
|
I have a two hour video tape that shows the basic setup and
|
|||
|
|
operation of several of these systems. The video has shots
|
|||
|
|
showing gas discharge bulbs lighting at several feet away from
|
|||
|
|
systems that were tuned to produce sparks, not pulse fields.
|
|||
|
|
Modification to a system such as you desire would be very
|
|||
|
|
minimal.
|
|||
|
|
|
|||
|
|
These systems BTW are designed and built for continous duty
|
|||
|
|
operation. Even though the caps are pulse discharged, and the
|
|||
|
|
peak powers are very high, the system produces more or less a
|
|||
|
|
continous field.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 4 Date: 03 Jan 94 13:49:37
|
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|
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From: Richard Quick
|
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To: Damian Wright
|
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Subj: Re: big magnetic pulse
|
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
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|
|
JA> I'd like some ideas on generating a LARGE magnetic pulse or
|
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|
|
JA> field.
|
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|
|||
|
|
DW> This'll create a magnetic pulse, don't know how big though,
|
|||
|
|
DW> it's a Tesla coil, (with lots of copper wire), it's not too
|
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|
|
DW> dangerous, it only kicks out about 40000Volts, but at a
|
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|
|
DW> pretty low A of course, if you're interested drop me a line
|
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|
DW> and I'll post the article I read on it up here on this net.
|
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|
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I'd beg to differ on a point or two.
|
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First you are correct in pointing to Tesla systems as a potent
|
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source of EMFs. The primary coil/tank circuit produce the EM
|
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fields in question.
|
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But the HV producing secondary would not be required, or even
|
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|
desired, if maximum field strength are all that is wanted. In
|
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|
|
addition, the secondary coils are quite capable of producing
|
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|
|
voltages in the megavolt range even with coils as small as 6"
|
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|
diameter and 2' tall. My larger 10" diameter, 32" high secondary
|
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produces between 3-5 megavolts with ease and is capable of 11'
|
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discharges (common) with recorded discharges up to (and even
|
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exceeding) 15' in length.
|
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Low amps? NOT! These bolts come off as thick as the average mans
|
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leg. Running the large system with 10 kVA 60 cycle input I get
|
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peak powers of 22 megawatts average; with an output voltage of 5
|
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megas this works out to over 4 amps current at the discharge
|
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|
terminal. While this may seem low, the system was designed to
|
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produce a null current 1/4 wave voltage peak on the discharger,
|
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and my figures are all conservative. Should I choose to alter the
|
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|
design parameters and shoot for a higher current output I see no
|
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reason why lower voltages at currents in excess of 1000 amps
|
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could not be produced.
|
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... And if all else fails... Put another megavolt through it
|
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|
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<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
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Msg#: 2581 Date: 01-03-94 13:53
|
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From: Dave Halliday
|
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|
To: Richard Quick
|
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|
Subj: 10KVA Tesla Coil
|
|||
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|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
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Hi Richard - just got back a couple days ago. Great trip!
|
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Anyway, I'll be starting the actual construction of the capacitors
|
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and the coil in the next week and will keep you posted!
|
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|
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I am going to be near Boeing Surplus tomorrow and if the high-voltage
|
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|
|
DC supply with the nice 39 Amp Powerstats is still there I'll
|
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offer 'em a hundred bucks for it and see what happens!
|
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|
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ANyway, I will keep you posted as to what is happening and will
|
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|
be keeping the tape rolling all throughout the testing process.
|
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|
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TTYL - Dave
|
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|
-!-
|
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b QMPro 1.51 b Live long and phosphor...
|
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|
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|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
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|
|
Msg#: 2577 Date: 01-03-94 13:59
|
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|
From: Richard Quick
|
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|
|
To: Jim Arconati
|
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Subj: big magnetic pulse
|
|||
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|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
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JA> I'd like some ideas on generating a LARGE magnetic pulse or
|
|||
|
|
JA> field.
|
|||
|
|
|
|||
|
|
DW> This'll create a magnetic pulse, don't know how big though,
|
|||
|
|
DW> it's a Tesla coil, (with lots of copper wire), it's not too
|
|||
|
|
DW> dangerous, it only kicks out about 40000Volts, but at a
|
|||
|
|
DW> pretty low A of course, if you're interested drop me a line
|
|||
|
|
DW> and I'll post the article I read on it up here on this net.
|
|||
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|
|
|||
|
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I have been posting on high powered Tesla systems in this
|
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|
conference for some time. See the thread: 10KVA Tesla Coil
|
|||
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|
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The Tesla Tank circuit is the pulse field generator. It uses a
|
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spark gap switch to pulse discharge a HV cap through a large
|
|||
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|
coil. The EMFs produced are incredible as peak powers in this
|
|||
|
|
circuit can easily reach many megawatts. My largest Tesla system
|
|||
|
|
has peak powers of 22+ megawatts and will light florescent bulbs
|
|||
|
|
at 50-60' without any wire connections to the tube. It will erase
|
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|
|
bank and credit card magnetic strips at a few yards, and is
|
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lethal to digital circuits (watches, calulators, etc.) at a
|
|||
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similar range.
|
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|
|||
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You do not need a secondary resonating coil (Tesla coil)
|
|||
|
|
inductively coupled to the tank circuit, the tank circuit is
|
|||
|
|
actually more effective alone than when coupled to the secondary
|
|||
|
|
resonator.
|
|||
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|
|||
|
|
I have a two hour video tape that shows the basic setup and
|
|||
|
|
operation of several of these systems. The video has shots
|
|||
|
|
showing gas discharge bulbs lighting at several feet away from
|
|||
|
|
systems that were tuned to produce sparks, not pulse fields.
|
|||
|
|
Modification to a system such as you desire would be very
|
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|
minimal.
|
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|
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|
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These systems BTW are designed and built for continous duty
|
|||
|
|
operation. Even though the caps are pulse discharged, and the
|
|||
|
|
peak powers are very high, the system produces more or less a
|
|||
|
|
continous field.
|
|||
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|
|||
|
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|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2584 Date: 01-03-94 15:39
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Jim Arconati
|
|||
|
|
Subj: Big Magnetic Pulse
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
JA>I'd like some ideas on generating a LARGE magnetic pulse or field.
|
|||
|
|
>Yeah, I know... "just set off a low-yield nuclear weapon," etc, etc...
|
|||
|
|
|
|||
|
|
JA>Save the bandwidth -- I want practical ideas (or non-nutcase theory)
|
|||
|
|
>on generating strong magnetic fields. How Big? Well how big can
|
|||
|
|
>I make one (without the nuclear device)? What's the strongest magnetic
|
|||
|
|
>field, and/or biggest magnetic pulse I could make without esoteric
|
|||
|
|
>devices (super-cooled superconductors are included in my definition
|
|||
|
|
>of esoteric.)
|
|||
|
|
|
|||
|
|
You can make a really large magnetic field but how large of an
|
|||
|
|
area do you want this field to be in... That is where you get into
|
|||
|
|
hideous amounts of input power.
|
|||
|
|
|
|||
|
|
Your best bet would be to have a large capacitor bank, charge it
|
|||
|
|
up to a couple tens of KV and then use some kind of flash discharge to
|
|||
|
|
connect it to your magnetic coil.
|
|||
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|
|||
|
|
Only problem would be the highly lethal voltage and current - not
|
|||
|
|
something to get into casually.
|
|||
|
|
|
|||
|
|
TTYL - Dave
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b Multitasking = screwing up several things at once.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2579 Date: 01-03-94 17:07
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
Dave,
|
|||
|
|
|
|||
|
|
I saw a post of yours up on the net today and thought I would
|
|||
|
|
drop you a line. How was your vacation?
|
|||
|
|
|
|||
|
|
I am interested is following up on your coiling activities, and
|
|||
|
|
wanted to tell you that another conference regular has received a
|
|||
|
|
copy of my tape and is going to be jumping back into coils after
|
|||
|
|
problems with his first unit (failed to produce the promised
|
|||
|
|
results). I sent him all of my notes, the plans for the spark
|
|||
|
|
gaps and the thread archives. I know with this information he
|
|||
|
|
will get the results he is looking for, but it will probably take
|
|||
|
|
a week for him to read through all of the material I have sent.
|
|||
|
|
|
|||
|
|
On another note I have seen a post from Jim Arconati wanting
|
|||
|
|
information on strong EM field generators. I tried to drop the
|
|||
|
|
hint that the Tesla Tank circuit is the only way to go if you
|
|||
|
|
want maximum peak powers. No other circuit I have seen or worked
|
|||
|
|
with can produce rapid, megawatt range, pulses.
|
|||
|
|
|
|||
|
|
I hope you can find the time to get your cap, coil, and tank
|
|||
|
|
circuit together in the next couple of months. I really am
|
|||
|
|
looking forward to getting some video and/or photos of your work
|
|||
|
|
in the near future.
|
|||
|
|
|
|||
|
|
Good luck, and remember to "Tune for Maximum Smoke!"
|
|||
|
|
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2580 Date: 01-03-94 17:21
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Damian Wright
|
|||
|
|
Subj: Re: big magnetic pulse
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
DW> This'll create a magnetic pulse, don't know how big though,
|
|||
|
|
DW> it's a Tesla coil, (with lots of copper wire), it's not too
|
|||
|
|
DW> dangerous, it only kicks out about 40000Volts, but at a
|
|||
|
|
DW> pretty low A of course, if you're interested drop me a line
|
|||
|
|
DW> and I'll post the article I read on it up here on this net.
|
|||
|
|
|
|||
|
|
P.S.
|
|||
|
|
|
|||
|
|
I am interested in seeing the article if it would not be too much
|
|||
|
|
trouble to peck it out. The 10KVA Tesla Coil thread has more than
|
|||
|
|
a few followers who would also appreciate seeing the material.
|
|||
|
|
|
|||
|
|
I will apologize in advance for critiquing the material (and your
|
|||
|
|
reply earlier) but I have seen too much misinformation published
|
|||
|
|
and repeated on this subject. I have built more than a few high
|
|||
|
|
power Tesla systems, and have many many hours of hands on
|
|||
|
|
experience with coils, HV pulse caps, spark excited tank circuits
|
|||
|
|
etc. to let misunderstandings go unchallenged.
|
|||
|
|
|
|||
|
|
If I come on a little strong it is only because I run very high
|
|||
|
|
power equipment and designed and hand built nearly all of it.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2589 Date: 01-03-94 17:31
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
RQ>Dave,
|
|||
|
|
|
|||
|
|
RQ>I saw a post of yours up on the net today and thought I would
|
|||
|
|
>drop you a line. How was your vacation?
|
|||
|
|
|
|||
|
|
Hi Richard - just got back a few days ago. Vacation was fantastic!
|
|||
|
|
I was on a small ( 150 foot ) cruise ship with 50 passengers, 30
|
|||
|
|
crew and 8 scientists nosing around the islands in the Sea of Cortez
|
|||
|
|
(between Baha and Mexico ) for 12 days.
|
|||
|
|
|
|||
|
|
Seattle's cold and rainy and I wanna go back!!!!! <grin>
|
|||
|
|
|
|||
|
|
RQ>I am interested is following up on your coiling activities, and
|
|||
|
|
>wanted to tell you that another conference regular has received a
|
|||
|
|
>copy of my tape and is going to be jumping back into coils after
|
|||
|
|
>problems with his first unit (failed to produce the promised
|
|||
|
|
>results). I sent him all of my notes, the plans for the spark
|
|||
|
|
|
|||
|
|
Great! It is really reassuring to know that it *can* be done.
|
|||
|
|
Especially since the time I tried in high school, I built the basic
|
|||
|
|
"classic" coil and was not concerned with ground or anything like that.
|
|||
|
|
|
|||
|
|
Got a few inches of wispy discharge that was barely visible in daylight
|
|||
|
|
and the coil got promptly broken down and the 15KV neon sign xformer
|
|||
|
|
got turned into a jacobs ladder for a local coffee house I was
|
|||
|
|
working in at the time.
|
|||
|
|
|
|||
|
|
I left you another note mentioning that I will be starting up some
|
|||
|
|
serious coil building in the next couple weeks. I still need to make
|
|||
|
|
the capacitors and to wind the secondary and build the support for the
|
|||
|
|
primary. I will be calling local plastics places to find the best price
|
|||
|
|
on the polyethylene and some plexi scraps.
|
|||
|
|
|
|||
|
|
I have some 3/4" bronze rod in my boat junk drawer and I'll turn the
|
|||
|
|
transformer protection gap out of that. I was wondering about some of
|
|||
|
|
the magnetically quenched gaps and was thinking of experimenting with
|
|||
|
|
embedding some cobalt-samarium magnets just under the gap faces.
|
|||
|
|
Maybe later...
|
|||
|
|
|
|||
|
|
Anyway, needless to say, I will be keeping the tape rolling during the
|
|||
|
|
smoke test. My neighbors already think I am weird, this will cinch it.
|
|||
|
|
|
|||
|
|
|
|||
|
|
RQ>On another note I have seen a post from Jim Arconati wanting
|
|||
|
|
>information on strong EM field generators. I tried to drop the
|
|||
|
|
>hint that the Tesla Tank circuit is the only way to go if you
|
|||
|
|
>want maximum peak powers. No other circuit I have seen or worked
|
|||
|
|
>with can produce rapid, megawatt range, pulses.
|
|||
|
|
|
|||
|
|
I did see someone asking about creating EMP, forgot the name but I
|
|||
|
|
replied mentioning using a capacitor and inductor triggered by a spark
|
|||
|
|
gap. I didn't know if they were just into individual pulses or a
|
|||
|
|
continuous oscillation. I'll keep an eye out.
|
|||
|
|
|
|||
|
|
RQ>I hope you can find the time to get your cap, coil, and tank
|
|||
|
|
>circuit together in the next couple of months. I really am
|
|||
|
|
>looking forward to getting some video and/or photos of your work
|
|||
|
|
>in the near future.
|
|||
|
|
|
|||
|
|
I am looking at about two months max to have everything working. My
|
|||
|
|
garage ( shop area ) is at the bottom of a driveway and I was thinking
|
|||
|
|
of just sinking a couple 10' sections of copper water pipe for the
|
|||
|
|
ground. I have a rotohammer and can punch through the cement drive. I
|
|||
|
|
was thinking of putting a valve on one end and running water through it
|
|||
|
|
while I was driving it into the ground. Should make it a bit easier.
|
|||
|
|
|
|||
|
|
Also, I forgot if I had mentioned it but I picked up about 40' of really
|
|||
|
|
heavy 1" copper braid at Boeing Surplus as well as a big spool of #22
|
|||
|
|
stranded teflon insulated wire. The wire is kind of fat - 25 turns /
|
|||
|
|
inch but it should be wonderful for a larger coil and also a magnifier.
|
|||
|
|
|
|||
|
|
The total cost for both plus some office litter was under $60 -
|
|||
|
|
definitely a good deal!
|
|||
|
|
|
|||
|
|
|
|||
|
|
RQ>Good luck, and remember to "Tune for Maximum Smoke!"
|
|||
|
|
|
|||
|
|
Thanks! and I will keep you posted! TTYL - Dave
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b We have enough scientists; we need more hunchbacks, Igor.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2590 Date: 01-03-94 17:37
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Jim Arconati
|
|||
|
|
Subj: big magnetic pulse
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ> JA> I'd like some ideas on generating a LARGE magnetic pulse or
|
|||
|
|
> JA> field.
|
|||
|
|
|
|||
|
|
RQ>The Tesla Tank circuit is the pulse field generator. It uses a
|
|||
|
|
>spark gap switch to pulse discharge a HV cap through a large
|
|||
|
|
>coil. The EMFs produced are incredible as peak powers in this
|
|||
|
|
>circuit can easily reach many megawatts. My largest Tesla system
|
|||
|
|
|
|||
|
|
RQ>I have a two hour video tape that shows the basic setup and
|
|||
|
|
>operation of several of these systems. The video has shots
|
|||
|
|
>showing gas discharge bulbs lighting at several feet away from
|
|||
|
|
>systems that were tuned to produce sparks, not pulse fields.
|
|||
|
|
>Modification to a system such as you desire would be very
|
|||
|
|
>minimal.
|
|||
|
|
|
|||
|
|
Hi Jim - butting in here. I have been in correspondence with
|
|||
|
|
Richard for some time and I sent away for his tape. It is fantastic!
|
|||
|
|
|
|||
|
|
Also, from your initial post, I thought that you wanted just a single
|
|||
|
|
pulse and not a continuous field. That is why I suggested what is
|
|||
|
|
essentially just a single shot tesla primary.
|
|||
|
|
|
|||
|
|
If you can use a continuous field, then a straight Tesla Coil setup is
|
|||
|
|
definitely the way to go!
|
|||
|
|
|
|||
|
|
Check with your local BBS to see back postings of the Tesla
|
|||
|
|
thread.
|
|||
|
|
|
|||
|
|
Good luck! Dave
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b The Electric Chair and the Clapper Switch. A
|
|||
|
|
great combo
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 04 Jan 94 16:55:00
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Jim Arconati
|
|||
|
|
Subj: BIG magnetic pulse
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Okay Jim, here we go:
|
|||
|
|
|
|||
|
|
You set up your huge bank of HV pulse discharging capacitors and
|
|||
|
|
charge them from a heavily protected HVDC power supply. The caps
|
|||
|
|
are discharged through a coil of any desired dimension.
|
|||
|
|
|
|||
|
|
The pulse is switched and controlled by placing two quenched
|
|||
|
|
spark gaps in series with the inductance. By adjusting the gaps
|
|||
|
|
you will be able to achieve a non-oscillating pulse through the
|
|||
|
|
coil.
|
|||
|
|
|
|||
|
|
Since the pulse is not oscillatory, your capacitance may be as
|
|||
|
|
large as you desire without having to worry about frequency
|
|||
|
|
changes (or power limits) as the circuit is scaled up or down
|
|||
|
|
according to needs. This means that the pulse can become
|
|||
|
|
extremely powerful as the capacitor bank value can be increased
|
|||
|
|
virtually without limit.
|
|||
|
|
|
|||
|
|
The key to successful operation of this circuit are the quenched
|
|||
|
|
spark gaps used in series with the inductance. They must quench
|
|||
|
|
extremely fast at very high power and they must be very high Q to
|
|||
|
|
produce a nice sharp pulse.
|
|||
|
|
|
|||
|
|
This type experiment is something I have never exactally
|
|||
|
|
performed intentionally, but my Tesla work parallels these
|
|||
|
|
circuit designs very very closely. As I have mentioned, a slight
|
|||
|
|
modification to any of my present tank circuits would result with
|
|||
|
|
a spark excited EMP generator of exceptional power.
|
|||
|
|
|
|||
|
|
If you are really serious in exploring this further I can offer
|
|||
|
|
specific help. I have designs on file (GIF) for a very high Q,
|
|||
|
|
air blast (quenching) spark gap designed for these high powers.
|
|||
|
|
I also have several files concerning the HV pulse discharging
|
|||
|
|
capacitors. I have archived the 10KVA Tesla Coil thread since
|
|||
|
|
10/5/93 and the file contains over 100 pages of posts with
|
|||
|
|
specific and related information on these type systems and sub-
|
|||
|
|
systems.
|
|||
|
|
|
|||
|
|
If you are interested in obtaining these text and GIF files send
|
|||
|
|
me a 3.5, 1.44 blank formatted disk and a SASE and I will send
|
|||
|
|
those to you post haste; there is no charge for the information.
|
|||
|
|
|
|||
|
|
The video tape is also recommended for those interested in very
|
|||
|
|
high power spark gap oscillators, it details things like: HV
|
|||
|
|
power supplies, control circuitry, HV RF choking and 60 cycle
|
|||
|
|
filters for the power supply and control circuits, spark gaps,
|
|||
|
|
coils, Jacob's Ladder (20 kv @ 8 kVA), etc.. The tape shows
|
|||
|
|
everything in operation, complete with the monster discharges
|
|||
|
|
from my big coil. I charge $10.00 for a 2 hr SP recorded one-off
|
|||
|
|
master. You must send me a blank (high quality) VHS tape, and a
|
|||
|
|
self addressed first class postage pre-paid mailer. I mail the
|
|||
|
|
tapes out within 48 hours from receipt of your package and I will
|
|||
|
|
guarantee you will be glued to the TV for the entire tape.
|
|||
|
|
|
|||
|
|
Every time I offer this tape I must make the following
|
|||
|
|
disclaimer: I cannot be responsible for the safety of anyone who
|
|||
|
|
replicates or attempts to replicate any of the systems or
|
|||
|
|
experiments featured on my video. The tape features nothing but
|
|||
|
|
high voltage, high energy systems any of which are quite capable
|
|||
|
|
of killing a person instantly or damaging valuable equipment.
|
|||
|
|
|
|||
|
|
My address is: Richard T. Quick II
|
|||
|
|
10028 Manchester Rd.
|
|||
|
|
Suite 253
|
|||
|
|
Glendale, MO 63122
|
|||
|
|
USA
|
|||
|
|
|
|||
|
|
I am available in this conference to answer any questions or
|
|||
|
|
comments you may have regarding the contents of the video should
|
|||
|
|
you choose to pop for a copy but the thread archives offer
|
|||
|
|
detailed text explainations for much of the contents of the video
|
|||
|
|
as I have already sent out several tapes to some of the regulars
|
|||
|
|
here. I have had no complaints regarding the quality of the
|
|||
|
|
presentation.
|
|||
|
|
|
|||
|
|
Good luck, and as always...
|
|||
|
|
|
|||
|
|
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2736 Date: 01-05-94 09:58
|
|||
|
|
From: Robert Taylor
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: Re: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> Quoting Richard Quick to Robert Taylor <=-
|
|||
|
|
|
|||
|
|
RQ> When serious research is done with any Tesla patented system or
|
|||
|
|
RQ> device it becomes all too clear that Telsa's world was based on
|
|||
|
|
RQ> well thought out and workable systems.
|
|||
|
|
|
|||
|
|
Bingo! Couldn't have put it better myself. The guy was definately a
|
|||
|
|
genius & at least 100 years before his time. The shame is that most
|
|||
|
|
people don't remember him for much past polyphase AC, high freq
|
|||
|
|
transmission, & synchronous motors when there was a ton of useful
|
|||
|
|
stuff beyond that.
|
|||
|
|
|
|||
|
|
Later...
|
|||
|
|
|
|||
|
|
... ...and in a strange turn of events, the cat was electrocuted.
|
|||
|
|
-!- Blue Wave/Max v2.12 [NR]
|
|||
|
|
! Origin: BLUFF CITY BBS - Under OS/2 - Memphis, TN (901) 763-3784
|
|||
|
|
(1:123/70)
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2675 Date: 01-05-94 10:57
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
RQ>Hey Dave!
|
|||
|
|
|
|||
|
|
RQ>Glad to have you back, and glad you had a good vacation. I wonder
|
|||
|
|
>how you fanangled such a trip???
|
|||
|
|
|
|||
|
|
I finagled it the old fashioned way, called up the tour agent and
|
|||
|
|
charged it. <grin> I like to get as far away from the telephone at
|
|||
|
|
least once a year wether I need it or not. Keeps me sane ( relatively )
|
|||
|
|
|
|||
|
|
RQ>Good Luck at Boeing with getting the heavy variacs, sounds like
|
|||
|
|
|
|||
|
|
RQ>You made some good choices on picking up the heavy 1" strap and
|
|||
|
|
>teflon wire. Building up supplies took me months before I got to
|
|||
|
|
>the point that I did not have to run out every 15 min. looking
|
|||
|
|
>for such and such as I expanded my coiling.
|
|||
|
|
|
|||
|
|
I will be going to Boeing today ( office person was also out of town and
|
|||
|
|
her plane did not get in on time yesterday ) They have a really funny
|
|||
|
|
pricing on stuff, some things are absurdly low, other things are way
|
|||
|
|
over what they should be. The good thing is that if you catch someone in
|
|||
|
|
a good mood, they will be open to any offer just to move the item. I am
|
|||
|
|
keeping my fingers crossed on this one!
|
|||
|
|
|
|||
|
|
Also, re: running out every 15 minutes... I know that feeling.
|
|||
|
|
I get to the point where I think that I have a good parts collection and
|
|||
|
|
then my next project needs something that I never even heard of...
|
|||
|
|
|
|||
|
|
My basement is getting to the point where space *is* the final
|
|||
|
|
frontier... <grin>
|
|||
|
|
|
|||
|
|
RQ>Your ground idea sounds great. Space the pipes about 5' min
|
|||
|
|
>distance apart and wire them together with the 1" strap using
|
|||
|
|
>soldered connections. Water pumped into the pipes is an excellent
|
|||
|
|
|
|||
|
|
OK - the garage is in the basement and the driveway slopes down to it.
|
|||
|
|
It is only 12 feet wide, I was thinking of spacing them closer than
|
|||
|
|
that. Another idea is that since the garage is on one edge of the
|
|||
|
|
house, I could just run pipes along that edge and bring the strap in
|
|||
|
|
through a window. My power panel is also in the garage so I could use
|
|||
|
|
it for the house ground as well...
|
|||
|
|
|
|||
|
|
>idea. If you are going through the effort of pressure water
|
|||
|
|
>injection into the ground site go a step further and drill a few
|
|||
|
|
>small holes into the pipe sidewalls and get as much surface area
|
|||
|
|
>wet as possible. Salt added to the water (or poured into the pipe
|
|||
|
|
|
|||
|
|
Very good idea! Seattle is kinda wet most of the time but we do have a
|
|||
|
|
couple weeks in the summer when it gets dry. You can see the locals
|
|||
|
|
running around with spray bottles misting down the mildew and moss on
|
|||
|
|
the houses... <grin>
|
|||
|
|
|
|||
|
|
>before it is pressurized) will increase the local conductivity
|
|||
|
|
|
|||
|
|
The salt is also a really good idea! I could pack the pipes with sea
|
|||
|
|
salt or make an "injector" out of some large diameter PVC with a hose
|
|||
|
|
fitting on each end. I have a nice garden ( yet another #$%^&* hobby )
|
|||
|
|
but that edge of the house is nowhere near it so there would not be any
|
|||
|
|
damage to plants.
|
|||
|
|
|
|||
|
|
>and improve your ground. A larger pipe or tin can may be set
|
|||
|
|
>around the grounding pipe where it enters the earth and may be
|
|||
|
|
>filled with water to trickle down around the ground. Use your
|
|||
|
|
>imagination.
|
|||
|
|
|
|||
|
|
Just thinking that there is a gutter runoff is on that side too - divert
|
|||
|
|
the water from that...
|
|||
|
|
|
|||
|
|
RQ>Constructing a good ground is very hard work, but essential to
|
|||
|
|
>performance coiling. You are wise to choose this often neglected
|
|||
|
|
|
|||
|
|
It does make sense - I was into ham radio a while ago and know a little
|
|||
|
|
bit about antennas and can appreciate what a good ground plane can do.
|
|||
|
|
I shudder to see some boats with fiberglass superstructures and see that
|
|||
|
|
people have mounted ground-plane whip antennas on them and they then
|
|||
|
|
gripe about how poor their radio is, can't get a good signal out of
|
|||
|
|
it... Also cars where the antenna is mounted on one corner of the
|
|||
|
|
roof - nice omnidirectional radiation pattern there... <grin>
|
|||
|
|
|
|||
|
|
>area as your starting point, and your neighbors will be thankful
|
|||
|
|
>(it really does limit the RFI). Nothing ruins a guys day like the
|
|||
|
|
>neighbors showing up at the door with torches in their hands
|
|||
|
|
> a la Frankenstein...
|
|||
|
|
|
|||
|
|
Actually, considering the neighborhood, that's a fun image! The area I
|
|||
|
|
am in was built in the 50's and has a lot of the original owners in
|
|||
|
|
there. I can see my next door neighbors in particular. They are really
|
|||
|
|
good people but the guy retired about 20 years ago ( Boeing engineer )
|
|||
|
|
and does not have any real hobbies except snooping into what I am doing.
|
|||
|
|
|
|||
|
|
I'll have the garage door open and be working on something and he will
|
|||
|
|
totter over and talk for a long time, grousing about the state of the
|
|||
|
|
world in general.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2679 Date: 01-05-94 16:40
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: Tesla goodies
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Hi Richard - just got back from Boeing Surplus. I took a good look at
|
|||
|
|
the high voltage supply. Made by HiPot, rated for 60KV at about 100-200
|
|||
|
|
milliamps. It would have been really nice to get but it was *huge*.
|
|||
|
|
The main transformer tank stands about four feet tall and then there is
|
|||
|
|
the control unit, an eight foot tall enclosed rack.
|
|||
|
|
|
|||
|
|
But the good news is that I also saw a triple-gang, motorized 50 Amp
|
|||
|
|
Powerstat unit there, priced at $300. I offered $100 and we settled on
|
|||
|
|
$150. Since it is motor controlled, I will just put it right near my
|
|||
|
|
main breaker panel and then run a conduit out to where I will be running
|
|||
|
|
the coil. This will be really nice too in that my control box can be
|
|||
|
|
smaller. For safeties sake, I will probably have a relay to disconnect
|
|||
|
|
the Powerstat and have a pushbutton switch on it that needs to be pushed
|
|||
|
|
every time I want to fire the coil. That way, if I have a small
|
|||
|
|
hand-held control box, I will not have the chance of it firing up
|
|||
|
|
accidentally.
|
|||
|
|
|
|||
|
|
Also, going through the back mail from when I was away, I got the
|
|||
|
|
January issue of the TCBA News and my membership certificate. Looks
|
|||
|
|
really well written, I will send away for some back issues.
|
|||
|
|
|
|||
|
|
I will keep you posted - Dave
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b Wench: What you use to turn the head of a dolt...
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2680 Date: 01-05-94 17:25
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
RQ>We are talking about placement and construction of a heavy RF
|
|||
|
|
>ground using two 10' lengths of copper water pipe...
|
|||
|
|
|
|||
|
|
RQ> DH> OK - the garage is in the basement and the driveway slopes
|
|||
|
|
> DH> down to it. It is only 12 feet wide, I was thinking of
|
|||
|
|
> DH> spacing them closer than that <5' apart>.
|
|||
|
|
|
|||
|
|
RQ>Your ground will have lower resistance to heavy RF current
|
|||
|
|
>(higher Q) if you space the pipes out about half of their length.
|
|||
|
|
>If the placement does not allow separation you are better off
|
|||
|
|
>just using one pipe. The reason for this is closely placed
|
|||
|
|
>grounding points will effectively act as a single point. The more
|
|||
|
|
>you space, the bigger the electrical ground produced.
|
|||
|
|
|
|||
|
|
|
|||
|
|
OK - got that. Thanks for the info. I will probably put the ground on
|
|||
|
|
the outside wall of the house alongside where the garage is. There is
|
|||
|
|
a
|
|||
|
|
property line there so I have a good long run to play with. I will need
|
|||
|
|
to get some more of that braiding but Boeing seems to always have a lot
|
|||
|
|
of it on hand. They charge $1.50 / pound.
|
|||
|
|
|
|||
|
|
|
|||
|
|
RQ> DH> My power panel is also in the garage so I could use
|
|||
|
|
> DH> it for the house ground as well...
|
|||
|
|
|
|||
|
|
RQ>Don't make permanent connections from the coil (RF) ground to the
|
|||
|
|
>house ground. This will allow RF bleedover and RFI problems. You
|
|||
|
|
>may make connections here when coils are not being fired, but
|
|||
|
|
>keep the control cabinet and the house ground at lower potential
|
|||
|
|
>than the RF ground. In other words when the RF ground is in use
|
|||
|
|
>grounding a coil it is "powered up" and full of RF current and
|
|||
|
|
>hash (RFI). If you connect your power cabinet to it then RF will
|
|||
|
|
>bleed into the house through the power cabinet 60 cycle ground
|
|||
|
|
>connection. Isolate the RF ground from other equipment.
|
|||
|
|
|
|||
|
|
Got it! That makes a lot of sense - even though there is a good ground,
|
|||
|
|
there is still a *lot* of current flowing into it and there could be
|
|||
|
|
some problems with bleedover.
|
|||
|
|
|
|||
|
|
Nothing like being able to draw a three foot long arc from my
|
|||
|
|
refrigerator. It would be a great hit at parties...
|
|||
|
|
|
|||
|
|
I will just keep the electrical panel just as it is and make the Tesla
|
|||
|
|
ground completely separate. I am also thinking of this summer, renting
|
|||
|
|
a generator and setting up a coil at the pier near Lake Washington and
|
|||
|
|
using a couple foot square aluminum sheet in the lake for the ground.
|
|||
|
|
The park I live by is used a lot for picnickers and such so it might get
|
|||
|
|
a bit of attention... A Seattle man was arrested today for... <grin>
|
|||
|
|
|
|||
|
|
TTYL for now - Dave
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b Proofread carefully to see if you any words out.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2678 Date: 01-05-94 17:29
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
We are talking about placement and construction of a heavy RF
|
|||
|
|
ground using two 10' lengths of copper water pipe...
|
|||
|
|
|
|||
|
|
DH> OK - the garage is in the basement and the driveway slopes
|
|||
|
|
DH> down to it. It is only 12 feet wide, I was thinking of
|
|||
|
|
DH> spacing them closer than that <5' apart>.
|
|||
|
|
|
|||
|
|
Your ground will have lower resistance to heavy RF current
|
|||
|
|
(higher Q) if you space the pipes out about half of their length.
|
|||
|
|
If the placement does not allow separation you are better off
|
|||
|
|
just using one pipe. The reason for this is closely placed
|
|||
|
|
grounding points will effectively act as a single point. The more
|
|||
|
|
you space, the bigger the electrical ground produced.
|
|||
|
|
|
|||
|
|
DH> My power panel is also in the garage so I could use
|
|||
|
|
DH> it for the house ground as well...
|
|||
|
|
|
|||
|
|
Don't make permanent connections from the coil (RF) ground to the
|
|||
|
|
house ground. This will allow RF bleedover and RFI problems. You
|
|||
|
|
may make connections here when coils are not being fired, but
|
|||
|
|
keep the control cabinet and the house ground at lower potential
|
|||
|
|
than the RF ground. In other words when the RF ground is in use
|
|||
|
|
grounding a coil it is "powered up" and full of RF current and
|
|||
|
|
hash (RFI). If you connect your power cabinet to it then RF will
|
|||
|
|
bleed into the house through the power cabinet 60 cycle ground
|
|||
|
|
connection. Isolate the RF ground from other equipment.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 06 Jan 94 12:34:30
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
DH> But the good news is that I also saw a triple-gang,
|
|||
|
|
DH> motorized 50 Amp Powerstat unit there, priced at $300. I
|
|||
|
|
DH> offered $100 and we settled on $150. Since it is motor
|
|||
|
|
DH> controlled, I will just put it right near my main breaker
|
|||
|
|
DH> panel and then run a conduit out to where I will be
|
|||
|
|
DH> running the coil. This will be really nice too in that my
|
|||
|
|
DH> control box can be smaller. For safeties sake, I will
|
|||
|
|
DH> probably have a relay to disconnect the Powerstat and have a
|
|||
|
|
DH> pushbutton switch on it that needs to be pushed every time I
|
|||
|
|
DH> want to fire the coil. That way, if I have a small hand-
|
|||
|
|
DH> held control box, I will not have the chance of it firing up
|
|||
|
|
DH> accidentally.
|
|||
|
|
|
|||
|
|
Your looking good. You should have no problems with current
|
|||
|
|
overload with these units even running a pole pig. Powerstats are
|
|||
|
|
commercial cont. duty rated and will handle a run at twice the
|
|||
|
|
plate rating for 5 min. or more before they warm up. If required
|
|||
|
|
you can use a cooling fan for real high current experiments. Good
|
|||
|
|
job on hunting down the right componet for the job.
|
|||
|
|
|
|||
|
|
Power relay safety interlocks are a very very good idea. I run
|
|||
|
|
two in my power cabinet, one before the variac and one after the
|
|||
|
|
variac. The first power relay interlock is tripped by key switch
|
|||
|
|
to prevent unauthorized powerup of the cabinet, the second
|
|||
|
|
interlock is switched with a toggle (cont. operation) and push
|
|||
|
|
button (manual pulse operation). Be sure to ground the variacs to
|
|||
|
|
the breaker box with #6 copper min. and to the water pipe with
|
|||
|
|
some more of that 1" strap. I use a separate 240 v breaker box
|
|||
|
|
with plug-in replaceable breakers (60 amps currently) on the feed
|
|||
|
|
to my cabinet/variacs.
|
|||
|
|
|
|||
|
|
DH> Also, going through the back mail from when I was away, I
|
|||
|
|
DH> got the January issue of the TCBA News and my membership
|
|||
|
|
DH> certificate. Looks really well written, I will send away
|
|||
|
|
DH> for some back issues.
|
|||
|
|
|
|||
|
|
Collecting back issues of the news is a good idea. I have issues
|
|||
|
|
dating back to 1988 and pop for another years worth of back
|
|||
|
|
issues every time I renew. I have seen some dynamite articles (I
|
|||
|
|
have been published here as well) and some really excellent coil
|
|||
|
|
projects... One issue had a guy's coil powered by a 455 Olds
|
|||
|
|
engine running a three phase 480 volt generator. The coil design
|
|||
|
|
was unfortunately "classic" in origin though modern construction
|
|||
|
|
and materials were used, but the article published the complete
|
|||
|
|
schematic for the generator/control circuits. You will find some
|
|||
|
|
really interesting stuff here.
|
|||
|
|
|
|||
|
|
Back on that ground for just a second. Make sure the pipes are
|
|||
|
|
driven in away from basement foundation walls by at least 5'.
|
|||
|
|
If you are putting the pipe in near a garage (built on a slab
|
|||
|
|
with no basement foundation) it will be no problem to place
|
|||
|
|
ground pipe right near the structure. The reason for this of
|
|||
|
|
course is that a basement foundation wall only contacts earth on
|
|||
|
|
one side, and grounding rod or pipe driven here will only conduct
|
|||
|
|
180 degrees of a circle instead of all 360.
|
|||
|
|
|
|||
|
|
Keep up the good work!
|
|||
|
|
|
|||
|
|
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2712 Date: 01-06-94 15:37
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: tesla stuff...
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Hi Richard - I was wondering if you had Walt Noon's address. You had
|
|||
|
|
mentioned that he had a design program and I just saw that the Tesla
|
|||
|
|
Bookstore in Chula Vista, CA carries it.
|
|||
|
|
|
|||
|
|
I would rather get it directly from him because he probably wholesales
|
|||
|
|
it to the bookstore and I would rather have him get the money.
|
|||
|
|
|
|||
|
|
I got the PowerStat temporarily hooked up and it runs fine! The
|
|||
|
|
motor takes about 30 seconds to go from one end to the other. I didn't
|
|||
|
|
really throw a load on it, just a 500 watt quartz-halide floodlamp but
|
|||
|
|
it seems to be in like-new condition.
|
|||
|
|
|
|||
|
|
Thanks again for all the info - I will be keeping you posted - Dave
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b Bureaucrats are the meat loaf of humanity.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2713 Date: 01-06-94 15:47
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: tesla
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Hi Richard - forgot to mention in the last message but I just realized
|
|||
|
|
that two days from now we will have the 50th anniversary of Tesla's
|
|||
|
|
death. ( 7 Jan 1943 )
|
|||
|
|
|
|||
|
|
Maybe coilers around the world should power up for a minute in
|
|||
|
|
commemoration...
|
|||
|
|
|
|||
|
|
Dave
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b In New Guinea: cargo cults. In the U.S.: vaporware.
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2714 Date: 01-06-94 17:47
|
|||
|
|
From: Dave Halliday
|
|||
|
|
To: Richard Quick
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
RQ> DH> But the good news is that I also saw a triple-gang,
|
|||
|
|
> DH> motorized 50 Amp Powerstat unit there, priced at $300. I
|
|||
|
|
> DH> offered $100 and we settled on $150. Since it is motor
|
|||
|
|
|
|||
|
|
RQ>Your looking good. You should have no problems with current
|
|||
|
|
>overload with these units even running a pole pig. Powerstats are
|
|||
|
|
>commercial cont. duty rated and will handle a run at twice the
|
|||
|
|
>plate rating for 5 min. or more before they warm up. If required
|
|||
|
|
>you can use a cooling fan for real high current experiments. Good
|
|||
|
|
>job on hunting down the right componet for the job.
|
|||
|
|
|
|||
|
|
I kinda figured they would do the trick when I saw them. I'll have to
|
|||
|
|
include a shot of them when I send you the video. They are *huge*
|
|||
|
|
|
|||
|
|
The whole assembly must weigh at least 250 pounds!
|
|||
|
|
|
|||
|
|
RQ>Power relay safety interlocks are a very very good idea. I run
|
|||
|
|
>two in my power cabinet, one before the variac and one after the
|
|||
|
|
>variac. The first power relay interlock is tripped by key switch
|
|||
|
|
>to prevent unauthorized powerup of the cabinet, the second
|
|||
|
|
>interlock is switched with a toggle (cont. operation) and push
|
|||
|
|
|
|||
|
|
I think so too. I have had some near misses because I *knew* that
|
|||
|
|
everything was turned off and safe... I am very cautious. When
|
|||
|
|
changing the blade on my table saw, I will un-plug it from the wall and
|
|||
|
|
drape the cord over the saw table so I can look at it while changing the
|
|||
|
|
blade... There is no one else at the house ( except for two shepherds )
|
|||
|
|
but something could fall on the switch or I could trip and put a hand
|
|||
|
|
out on the wrong thing...
|
|||
|
|
|
|||
|
|
The key switch is one idea I hadn't thought of and the idea has just
|
|||
|
|
been swiped! <grin> I can imagine my leaving the garage door open some
|
|||
|
|
day and having a neighborhood kid walk in out of curiosity...
|
|||
|
|
|
|||
|
|
The idea with the relay was that whenever the coil was powered down, the
|
|||
|
|
relay would drop out and I would have to walk over to the PowerStat and
|
|||
|
|
hit a button to reset it. That way, if I have a hand-held remote, there
|
|||
|
|
would be no way I could fire it from the remote without first engaging
|
|||
|
|
the relay. The same relay would also be connected to the kill button on
|
|||
|
|
the remote.
|
|||
|
|
|
|||
|
|
I have also been thinking that since I use the little five-amp Variac on
|
|||
|
|
my test bench at the store but I do most of my home-brew electronics at
|
|||
|
|
the house, I could also run a line from the PowerStat to my workbench
|
|||
|
|
for testing electronics stuff. Kill two birds with one stone - blow
|
|||
|
|
things up with the coil and then fix them on the bench... <grin>
|
|||
|
|
|
|||
|
|
>button (manual pulse operation). Be sure to ground the variacs to
|
|||
|
|
>the breaker box with #6 copper min. and to the water pipe with
|
|||
|
|
>some more of that 1" strap. I use a separate 240 v breaker box
|
|||
|
|
>with plug-in replaceable breakers (60 amps currently) on the feed
|
|||
|
|
>to my cabinet/variacs.
|
|||
|
|
|
|||
|
|
Yeah - I was thinking of putting a 60 amp breaker in the main box, then
|
|||
|
|
coming off of that to a smaller box ( maybe with a couple of 60 amp
|
|||
|
|
fast-blow fuses ) and using that box to connect to the PowerStat.
|
|||
|
|
|
|||
|
|
I would then have a commercial ( Industrial grade ) electronics box
|
|||
|
|
conduited to it holding the relays and the control electronics. I was
|
|||
|
|
also thinking of picking up two current shunts so I could instrument the
|
|||
|
|
puppy a bit.
|
|||
|
|
|
|||
|
|
RQ> DH> Also, going through the back mail from when I was away, I
|
|||
|
|
> DH> got the January issue of the TCBA News and my membership
|
|||
|
|
|
|||
|
|
RQ>Collecting back issues of the news is a good idea. I have issues
|
|||
|
|
>dating back to 1988 and pop for another years worth of back
|
|||
|
|
>issues every time I renew. I have seen some dynamite articles (I
|
|||
|
|
>have been published here as well) and some really excellent coil
|
|||
|
|
|
|||
|
|
I noticed that the quality of writing was really good. Much better than
|
|||
|
|
Boarderlands or any of the "fringe" types. Actual legible circuit
|
|||
|
|
diagrams... Stuff like that... <grin>
|
|||
|
|
|
|||
|
|
>projects... One issue had a guy's coil powered by a 455 Olds
|
|||
|
|
>engine running a three phase 480 volt generator. The coil design
|
|||
|
|
>was unfortunately "classic" in origin though modern construction
|
|||
|
|
>and materials were used, but the article published the complete
|
|||
|
|
>schematic for the generator/control circuits. You will find some
|
|||
|
|
>really interesting stuff here.
|
|||
|
|
|
|||
|
|
That would be something to see!
|
|||
|
|
|
|||
|
|
RQ>Back on that ground for just a second. Make sure the pipes are
|
|||
|
|
>driven in away from basement foundation walls by at least 5'.
|
|||
|
|
>If you are putting the pipe in near a garage (built on a slab
|
|||
|
|
>with no basement foundation) it will be no problem to place
|
|||
|
|
>ground pipe right near the structure. The reason for this of
|
|||
|
|
>course is that a basement foundation wall only contacts earth on
|
|||
|
|
>one side, and grounding rod or pipe driven here will only conduct
|
|||
|
|
>180 degrees of a circle instead of all 360.
|
|||
|
|
|
|||
|
|
I was thinking of that. My initial plan was to run them down the side
|
|||
|
|
of the house but taking a walk out there made me realize that I would be
|
|||
|
|
loosing half of the ground. The property line is about 8 feet away so
|
|||
|
|
I
|
|||
|
|
will run it there. That particular line is the one I share with my
|
|||
|
|
grumpy neighbor so it should be a fun time putting them in.
|
|||
|
|
|
|||
|
|
Your'e doing what??? For *what*??? What's a "Tesla Coil" anyway???
|
|||
|
|
|
|||
|
|
RQ>Keep up the good work!
|
|||
|
|
|
|||
|
|
Thanks for the info/advice/help!
|
|||
|
|
|
|||
|
|
TTYL - Dave
|
|||
|
|
-!-
|
|||
|
|
b QMPro 1.51 b <<< Tagline deleted by Natl Endowment for the Arts >>>
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 1 Date: 06 Jan 94 22:14:20
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: tesla stuff...
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
DH> Hi Richard - I was wondering if you had Walt Noon's address.
|
|||
|
|
DH> You had mentioned that he had a design program and I just
|
|||
|
|
DH> saw that the Tesla Bookstore in Chula Vista, CA carries it.
|
|||
|
|
|
|||
|
|
Walt and I are good friends. I have helped him debug, add
|
|||
|
|
features, and made other suggestions that he incorporated into
|
|||
|
|
the software. It works.
|
|||
|
|
|
|||
|
|
Please do write to him and let him know I am recommending his
|
|||
|
|
software in the conference. I owe him a letter still, so send my
|
|||
|
|
regards and tell him the halloween photos were appreciated.
|
|||
|
|
|
|||
|
|
Walt Noon III
|
|||
|
|
3283 Belvedere
|
|||
|
|
Riverside, CA. 92507
|
|||
|
|
|
|||
|
|
|
|||
|
|
DH> I got the PowerStat temporarily hooked up and it runs fine!
|
|||
|
|
DH> it seems to be in like-new condition.
|
|||
|
|
|
|||
|
|
Cool dude, you be entering the world of high voltage soon.
|
|||
|
|
|
|||
|
|
-!-
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 2 Date: 06 Jan 94 22:20:57
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Robert Taylor
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
-=> Quoting Richard Quick to Robert Taylor <=-
|
|||
|
|
|
|||
|
|
RQ> When serious research is done with any Tesla patented system
|
|||
|
|
RQ> or device it becomes all too clear that Telsa's world was
|
|||
|
|
RQ> based on well thought out and workable systems.
|
|||
|
|
|
|||
|
|
RT> Bingo! Couldn't have put it better myself. The guy was
|
|||
|
|
RT> definately a genius & at least 100 years before his time.
|
|||
|
|
RT> The shame is that most people don't remember him for much
|
|||
|
|
RT> past polyphase AC, high freq transmission, & synchronous
|
|||
|
|
RT> motors when there was a ton of useful stuff beyond that.
|
|||
|
|
RT> Later...
|
|||
|
|
|
|||
|
|
The shame is that most people don't remember Tesla at all :-(
|
|||
|
|
-!-
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
Msg#: 3 Date: 06 Jan 94 22:32:13
|
|||
|
|
From: Richard Quick
|
|||
|
|
To: Dave Halliday
|
|||
|
|
Subj: 10KVA Tesla Coil
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
Just read your other posts. The ground seems to be well planned
|
|||
|
|
and thought out. Go with it, it will work great and will be
|
|||
|
|
expandable when you go to put a bigger coil on it.
|
|||
|
|
|
|||
|
|
Your safety and protection system ideas sound level headed, and
|
|||
|
|
should work fine. Just don't forget to wire them in for those
|
|||
|
|
first few test runs.
|
|||
|
|
|
|||
|
|
The aniversity of Tesla's death should be celebrated with
|
|||
|
|
everyone switching off the electrical mains into their houses,
|
|||
|
|
then maybe people would begin to appreciate what he gave to
|
|||
|
|
mankind....
|
|||
|
|
|
|||
|
|
That HE was the one that brought power to the world!!!
|
|||
|
|
-!-
|
|||
|
|
... If all else fails... Put another megavolt through it.
|
|||
|
|
|
|||
|
|
======================================================================
|
|||
|
|
=====
|
|||
|
|
Date: 07-01-94 (11:18) Number: 2504
|
|||
|
|
From: DAVE HALLIDAY Refer#: NONE
|
|||
|
|
To: RICHARD QUICK Recvd: NO
|
|||
|
|
Subj: 10KVA TESLA COIL Conf: (218) Electronic
|
|||
|
|
----------------------------------------------------------------------
|
|||
|
|
-----
|
|||
|
|
RQ>Just read your other posts. The ground seems to be well planned
|
|||
|
|
>and thought out. Go with it, it will work great and will be
|
|||
|
|
>expandable when you go to put a bigger coil on it.
|
|||
|
|
|
|||
|
|
I was a ham for a while and also worked on some FM stations when I was
|
|||
|
|
in college and I can appreciate the value of a good ground. I am also
|
|||
|
|
into overbuilding anything that I can get my hands on. Takes more time
|
|||
|
|
at the beginning but it never breaks later...
|
|||
|
|
|
|||
|
|
|
|||
|
|
RQ>Your safety and protection system ideas sound level headed, and
|
|||
|
|
>should work fine. Just don't forget to wire them in for those
|
|||
|
|
>first few test runs.
|
|||
|
|
|
|||
|
|
This is a very astute comment. Patience has never been one of my
|
|||
|
|
virtues and I have to force myself to complete some of the things I work
|
|||
|
|
on instead of just running with them when they get to a certain level...
|
|||
|
|
|
|||
|
|
Rest assured though that I fully appreciate the dangers of the high
|
|||
|
|
voltages involved here... I have been "bit" a few times with tube
|
|||
|
|
equipment and have no desire for that to happen again!
|
|||
|
|
|
|||
|
|
RQ>The aniversity of Tesla's death should be celebrated with
|
|||
|
|
>everyone switching off the electrical mains into their houses,
|
|||
|
|
>then maybe people would begin to appreciate what he gave to
|
|||
|
|
>mankind....
|
|||
|
|
|
|||
|
|
RQ> That HE was the one that brought power to the world!!!
|
|||
|
|
|
|||
|
|
This is so true! That would be something to do - turn off the main
|
|||
|
|
breaker for ten minutes. The more and more I read about his work, the
|
|||
|
|
more I realize just how much everyone *else* derived from his ideas!
|
|||
|
|
|
|||
|
|
Anyway, TTYL - Dave
|
|||
|
|
|
|||
|
|
b QMPro 1.51 b Hey, don't pick up that dogW<67>.<2E> <20> D NO TERRIER
|
|||
|
|
|
|||
|
|
|
|||
|
|
--- WM v3.10/93-0100
|
|||
|
|
* Origin: St. Louis Users Group BBS (314) 878-7614 (1:100/4.0)
|
|||
|
|
(1:100/4)
|
|||
|
|
|
|||
|
|
======================================================================
|
|||
|
|
=====
|
|||
|
|
BBS: WELCOM BBS
|
|||
|
|
Date: 21-02-94 (10:57) Number: 3295
|
|||
|
|
From: RICHARD QUICK Refer#: NONE
|
|||
|
|
To: BRIAN CARLING Recvd: NO
|
|||
|
|
Subj: 10KVA Tesla Coil Conf: (111) ELECTRONIC
|
|||
|
|
----------------------------------------------------------------------
|
|||
|
|
-----
|
|||
|
|
L1 T1
|
|||
|
|
뀎<><EB808E><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
|
|||
|
|
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
3 L2 3
|
|||
|
|
3 3
|
|||
|
|
G1 O 3
|
|||
|
|
O 3
|
|||
|
|
3 C1 3
|
|||
|
|
~A<><41><EFBFBD><EFBFBD><EFBFBD><EFBFBD>' ~A<><41><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>'
|
|||
|
|
3 3
|
|||
|
|
3 3
|
|||
|
|
3 3
|
|||
|
|
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
X1 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><14>
|
|||
|
|
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
3 3
|
|||
|
|
3 3
|
|||
|
|
60 Hz Line In
|
|||
|
|
|
|||
|
|
|
|||
|
|
L1 = Tesla secondary coil.
|
|||
|
|
T1 = Discharge Terminal
|
|||
|
|
L2 = Tank Circuit Primary Coil
|
|||
|
|
G1 = Tank Circuit Spark Gap
|
|||
|
|
C1 = High Voltage, Pulse Discharging Capacitor
|
|||
|
|
X1 = High Voltage Step Up Transformer
|
|||
|
|
|
|||
|
|
|
|||
|
|
Power to drive the circuit is normally 60 Cycle 120/240 fed to a
|
|||
|
|
step up transformer (Neon sign, potential, power distribution, or
|
|||
|
|
plate type). The step up xfrmr charges capacitor C1 in the Tank
|
|||
|
|
Circuit. When C1 is fully charged, the voltage breaks down the
|
|||
|
|
air at the main system sparkgap <G1>, which sets the Tank Circuit
|
|||
|
|
into a high frequency oscillation. The specific frequency of
|
|||
|
|
oscillation is determined by the value of C1, and the inductance
|
|||
|
|
(# of turns) in the primary coil L2.
|
|||
|
|
|
|||
|
|
L1 is grounded at the base, as is the case and core of X1.
|
|||
|
|
L1 is fitted with a conductive discharge terminal on the
|
|||
|
|
ungrounded (air) end of the coil.
|
|||
|
|
|
|||
|
|
This is among the simplest circuits that Tesla patented, and is a
|
|||
|
|
good start for a beginner. A typical Tesla secondary in this
|
|||
|
|
circuit (L1) may be constructed by close winding about 1500 feet
|
|||
|
|
of #22 double Formvar coated magnet wire on a 6" diameter section
|
|||
|
|
of dried PVC thin wall drain pipe that has been well sealed with
|
|||
|
|
polyurethane or two part epoxy paint. The coil should be around
|
|||
|
|
24" high (no more than 30") and tightly, evenly wound with a
|
|||
|
|
single layer of wire. Leave about an inch of coil form above and
|
|||
|
|
below the windings. The coil is capped top and bottom with 1/4"
|
|||
|
|
plexiglas plates glued on with expoy. No holes are drilled into
|
|||
|
|
the sides of the PVC coil form. Once the coil is wound, it is
|
|||
|
|
again sealed with polyurethane or two part epoxy paint to prevent
|
|||
|
|
breakdown.
|
|||
|
|
|
|||
|
|
L2, the Primary Coil, is wound from 60-75 feet of 3/8" OD soft
|
|||
|
|
copper water pipe or refrigerator tubing. Wind the coil in a
|
|||
|
|
flat, pancake, spiral on some plastic insulating supports. The
|
|||
|
|
inside turn should be about 9-10 inches in diameter, with turns
|
|||
|
|
spaced about 1/4" apart. The finished coil should be about as
|
|||
|
|
wide as coil L1 is long, or a little wider.
|
|||
|
|
|
|||
|
|
C1 has typical values around .009 - .02 uf (microfarads) with a
|
|||
|
|
voltage rating between 10 - 20 killovolts AC. For best
|
|||
|
|
performance the capacitor should be pulse rated for rapid
|
|||
|
|
discharge.
|
|||
|
|
|
|||
|
|
T1 is the secondary coil discharger. A beginner might throw a 4-5
|
|||
|
|
inch diameter spherical aluminum flag pole top on the coil for a
|
|||
|
|
discharger. A Toriod (donut shaped) discharger will give higher
|
|||
|
|
breakdown voltages, and longer sparks.
|
|||
|
|
|
|||
|
|
G1 is the main system spark gap. Two solid brass utility door
|
|||
|
|
knobs from the hardware section at Walmart may be mounted on an
|
|||
|
|
insulating support. With the smooth knobs facing one another, and
|
|||
|
|
at least one knob made movable for adjustment, they will serve
|
|||
|
|
well for low power coiling for a beginner.
|
|||
|
|
|
|||
|
|
X1 for most beginners is the common Neon Sign xfrmr. The higher
|
|||
|
|
voltage units are best, but you must not exceed the voltage
|
|||
|
|
rating of your capacitor C1. To increase the current to charge
|
|||
|
|
the capacitor you may run several neon sign xfrmrs in parallel.
|
|||
|
|
... And if all else fails... Put another megavolt through it
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
|
|||
|
|
--- WM v3.10/93-0100
|
|||
|
|
* Origin: St. Louis Users Group BBS (314) 878-7614 (1:100/4.0)
|
|||
|
|
(1:100/4)
|
|||
|
|
|
|||
|
|
======================================================================
|
|||
|
|
=====
|
|||
|
|
BBS: WELCOM BBS
|
|||
|
|
Date: 27-04-94 (20:00) Number: 5940
|
|||
|
|
From: RICHARD QUICK Refer#: NONE
|
|||
|
|
To: DAVE HALLIDAY Recvd: NO
|
|||
|
|
Subj: 10KVA Tesla Coil Conf: (111) ELECTRONIC
|
|||
|
|
----------------------------------------------------------------------
|
|||
|
|
-----
|
|||
|
|
Dave,
|
|||
|
|
|
|||
|
|
I thought I would take a minute to cover some aspects of RF
|
|||
|
|
choking on the feed lines to the Tesla Tank circuit. I will refer
|
|||
|
|
you to vol. 13, #2, page 6 of the Tesla Coil Builders Association
|
|||
|
|
publication NEWS for a start. Since others will be reading this,
|
|||
|
|
and will not have access to this publication, I will reproduce
|
|||
|
|
the circuit diagram below.
|
|||
|
|
|
|||
|
|
PC1 X1 RFC 1A RFC 2A
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>> TO TESLA TANK
|
|||
|
|
<20><><EFBFBD> )<29>( 3
|
|||
|
|
<20><><EFBFBD> )<29>( 3
|
|||
|
|
3 )<29>( O
|
|||
|
|
.<2E><><EFBFBD><EFBFBD>' )<29>( .<2E><><EFBFBD><EFBFBD><EFBFBD>o SAFETY GAP
|
|||
|
|
3 )<29>( O
|
|||
|
|
<20><><EFBFBD> )<29>( 3
|
|||
|
|
<20><><EFBFBD> )<29>( 3
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>UUUUU<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>UUUUU<EFBFBD><EFBFBD><EFBFBD>> TO TESLA TANK
|
|||
|
|
PC2 RFC 1B RFC 2B
|
|||
|
|
|
|||
|
|
"Radio Frequency Chokes RFC 1A and 1B are wound with about 70
|
|||
|
|
turns on a 1" cylinder (PVC, plastic, etc.). RFC 2A and 2B are
|
|||
|
|
wound with around 20 turns on a similar form. The size of the
|
|||
|
|
wire is not critical as long as the wire is capable of carrying
|
|||
|
|
the rated current."
|
|||
|
|
|
|||
|
|
"Protective Capacitors PC1 and PC2 are not critical and can be
|
|||
|
|
rated in the vicinity of .5 to 2 microfarads. Use a voltage
|
|||
|
|
rating as high as possible. The usual 400-600 volt capacitors
|
|||
|
|
will not withstand kickbacks for very long. I prefer capacitors
|
|||
|
|
with ratings of from 2500 to 5000 (or higher) volts"
|
|||
|
|
|
|||
|
|
The above is quoted from the article, X1 is of course the high
|
|||
|
|
voltage step up transformer that supplies the Tesla Tank. I will
|
|||
|
|
note that this circuit is the bare minimum protection required,
|
|||
|
|
and that this is only adequate for small (6") coils running under
|
|||
|
|
1.5 KVA.
|
|||
|
|
|
|||
|
|
Even the author, Harry Goldman, admits that this RF protection
|
|||
|
|
circuit does not eliminate, but only reduces the RF and kickback
|
|||
|
|
problem. Note his statement that the low voltage line PC
|
|||
|
|
(Protective Capacitors) capacitors (PC1 & PC2) need a rating of
|
|||
|
|
2500 volts or higher. These capacitors are across the 120 or 240
|
|||
|
|
volt 60 cycle line!!!! Imagine what voltage spikes are appearing
|
|||
|
|
in the house or shop supply line if 400-600 protective capacitors
|
|||
|
|
are routinely failing. Obviously the problem needs some more
|
|||
|
|
attention.
|
|||
|
|
|
|||
|
|
Please note the modifications to the above circuit in my
|
|||
|
|
recommended circuit below.
|
|||
|
|
|
|||
|
|
<20>------<2D>
|
|||
|
|
| | X1 RFC 1A
|
|||
|
|
<EFBFBD><EFBFBD>|<7C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>|<7C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>> TO TESLA TANK
|
|||
|
|
| | )<29>( 3 3
|
|||
|
|
| | )<29>( 3 3
|
|||
|
|
| | )<29>( BC1 <20><><EFBFBD> O
|
|||
|
|
| LF1 ~A<>. )<29>( <20><><EFBFBD> o<><6F>. SAFETY GAP
|
|||
|
|
| | )<29>( 3 O
|
|||
|
|
| | )<29>( 3 3
|
|||
|
|
| | )<29>( 3 3
|
|||
|
|
<EFBFBD><EFBFBD>|<7C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>|<7C><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>UUUUU<55><55><EFBFBD>> TO TESLA TANK
|
|||
|
|
| | 3 RFC 1B
|
|||
|
|
<20>------<2D> <20><><EFBFBD>
|
|||
|
|
grnd
|
|||
|
|
|
|||
|
|
LF1 is a commercial heavy duty line filter wired in reverse.
|
|||
|
|
Where current throughputs are high I use several in parallel.
|
|||
|
|
Quality commercial line filters employ iron powder chokes, as
|
|||
|
|
well as the "PC" capacitors of the circuit at the top of this
|
|||
|
|
post. The Line Filters I use also have RF choke coils in the
|
|||
|
|
ground path; the ground wire can be run reversed (it is neutral)
|
|||
|
|
and can be used to trap stray RF, preventing ground path
|
|||
|
|
contamination to the 60 cycle breaker box. I should note that I
|
|||
|
|
use a minimum of two independent grounds. The core of X1, and
|
|||
|
|
everything to the right of X1 in this diagram, is grounded
|
|||
|
|
separately to a heavy, dedicated, RF ground. This heavy RF ground
|
|||
|
|
is also used to ground the base of the Tesla secondary.
|
|||
|
|
|
|||
|
|
Note that the core of X1 is grounded in this diagram, where the
|
|||
|
|
top diagram shows the core floating ungrounded. I believe this
|
|||
|
|
was an oversight of Mr. Goldman's.
|
|||
|
|
|
|||
|
|
BC1 is a Bypass Capacitor. I use high voltage barium titanate
|
|||
|
|
doorknobs, with stacks of four or more in series. A typical
|
|||
|
|
rating for a single cap would be .003 microfarad @ 30 KVDC, and
|
|||
|
|
using four of these caps in series I get .0007 microfarads at 120
|
|||
|
|
KVDC. Since the AC rating is about half the DC rating on these
|
|||
|
|
type capacitors, figure a series stack of four will withstand a
|
|||
|
|
kickback of 50-60 KVAC in this use.
|
|||
|
|
|
|||
|
|
Where center tap ground type xfrmrs are used for X1 (such as neon
|
|||
|
|
sign cores) BC1 must be divided into two units, and the center of
|
|||
|
|
the stack must be grounded with the xfrmr core (see the arrange-
|
|||
|
|
ment of PC1 and PC2 in the top most diagram). Use no more than
|
|||
|
|
.0008 or so microfarads per side, as too large a bypass capaci-
|
|||
|
|
tance will create an oscillating current in the high voltage
|
|||
|
|
windings on your step up xfrmr that will cause the xfrmr to fail.
|
|||
|
|
|
|||
|
|
RFC 1A and RFC 1B are about 15-20 turns (minimum) of insulated
|
|||
|
|
wire on a large iron powder core. I use 2" diameter iron powder
|
|||
|
|
toroids to wind these chokes.
|
|||
|
|
|
|||
|
|
I have found that the RF and Kickback protection of the circuit
|
|||
|
|
using bypass capacitors and iron powder (as opposed to air core)
|
|||
|
|
RF chokes is much better than the simpler circuit recommended by
|
|||
|
|
Mr. Goldman. If you are running a small tabletop Tesla coil, then
|
|||
|
|
Mr. Goldman's circuit is probably all you need. But if you are
|
|||
|
|
running, or intend to run, more than 1.5 KVA out of your power
|
|||
|
|
supply; look carefully at the circuit I have outlined.
|
|||
|
|
Remember... Over 1.5 KVA and the kickbacks are sounding like high
|
|||
|
|
powered rifle shots at the safety gap. They will "light up your
|
|||
|
|
life" if not properly contained and grounded.
|
|||
|
|
|
|||
|
|
... If all else fails... Throw another Megavolt across it!
|
|||
|
|
|
|||
|
|
|
|||
|
|
--- WM v3.10/93-0100
|
|||
|
|
* Origin: St. Louis Users Group BBS (314) 878-7614 (1:100/4.0)
|
|||
|
|
(1:100/4)
|
|||
|
|
|
|||
|
|
======================================================================
|
|||
|
|
=====
|
|||
|
|
Date: 03-05-94 (21:05) Number: 6265
|
|||
|
|
From: RICHARD QUICK Refer#: NONE
|
|||
|
|
To: BLAIR GROVES Recvd: NO
|
|||
|
|
Subj: 10KVA Tesla Coil Conf: (111) ELECTRONIC
|
|||
|
|
----------------------------------------------------------------------
|
|||
|
|
-----
|
|||
|
|
BG> Hi Richard, I've been reading about a monster Tesla coil
|
|||
|
|
BG> you've made, but got into this echo a bit too late to hear
|
|||
|
|
BG> the important stuff... can you fill me in on it? (like, how
|
|||
|
|
BG> big is this beast, and what can you do with such a thing?)..
|
|||
|
|
|
|||
|
|
The coil is not very big. The actual coil featured on the video
|
|||
|
|
is 10-3/4 inches in diameter. The winding is a single layer of
|
|||
|
|
#21 magnet wire, 1024 close spaced turns, making a winding length
|
|||
|
|
that is only 32", on a form that totals 35" in height. But the
|
|||
|
|
sparks from this coil have exceeded 14 feet in length...
|
|||
|
|
|
|||
|
|
I have imported some stuff from my archives (which are extensive)
|
|||
|
|
to answer in more detail...
|
|||
|
|
|
|||
|
|
>What can a person do with such a device once constructed? Does
|
|||
|
|
>it have any practical purpose other than to amuse your friends?
|
|||
|
|
|
|||
|
|
I first began to build small 1/4 wave (spark generating) Tesla
|
|||
|
|
coils for fun. I loved the light show, and so did my friends. As
|
|||
|
|
I gained experiance in building coils I realized that most of the
|
|||
|
|
"plans" were full of inaccuracies. I began to design my own
|
|||
|
|
systems to increase efficiency. As my interest and experience
|
|||
|
|
grew, I discovered more advanced coil systems that Tesla designed
|
|||
|
|
(the Tesla Magnifier) and began initial research into other
|
|||
|
|
areas: particle acceleration, lasers, wireless power
|
|||
|
|
transmission, and particle beams. I am planning on making a very
|
|||
|
|
serious study in these areas in the next few years.
|
|||
|
|
|
|||
|
|
Dave Archer is a painter in California who uses a Tesla coil to
|
|||
|
|
electrically spread paint. He places his canvas on a grounded
|
|||
|
|
plate and directs the Tesla discharge over it. The resulting
|
|||
|
|
paintings are regularly featured as space backgrounds and hanging
|
|||
|
|
art on Star Trek TNG, Omni Magazine and several other publica-
|
|||
|
|
tions, as well as private collections. Tesla coils were also used
|
|||
|
|
in the time travel scenes in both Terminator movies, and are re-
|
|||
|
|
emerging in the special effects industry because they photograph
|
|||
|
|
well and the sparks are more realistic than computer generation
|
|||
|
|
or animation.
|
|||
|
|
|
|||
|
|
Tesla coils were used in the first induction heaters, and were
|
|||
|
|
employed medically for the treatment of arthritis and other joint
|
|||
|
|
and muscle problems. The same coil could be adjusted to generate
|
|||
|
|
sufficient voltage to produce X-Rays, and as such a Tesla coil
|
|||
|
|
was a standard medical instrument in Dr's offices in the early
|
|||
|
|
1900s. Nearly all of the first high quality X-Rays were produced
|
|||
|
|
with Tesla driven X-Ray tubes until the 1930's. The first self
|
|||
|
|
cauterizing "electric scalpels" were electrified with a Tesla
|
|||
|
|
coil.
|
|||
|
|
|
|||
|
|
A Tesla coil is in your monitor (flyback transformer). Tesla
|
|||
|
|
coils were also an important part of the first radio
|
|||
|
|
transmitters. My feeling is that the Tesla coil has a major place
|
|||
|
|
in modern physics, but has not been fully evaluated.
|
|||
|
|
|
|||
|
|
The 1/4 wave Tesla coil (sweet and simple, though there
|
|||
|
|
are other configurations) is an oscillator driven, air core
|
|||
|
|
resonate transformer.
|
|||
|
|
|
|||
|
|
The oscillating tank circuit drives the secondary coil. The tank
|
|||
|
|
circuit consists of pulse discharging capacitors, air gap (spark
|
|||
|
|
gap, break) and the primary coil. I said the setups are very
|
|||
|
|
flexible, so I will focus on specs for the 10KVA coil.
|
|||
|
|
|
|||
|
|
The primary coil is wound from a single 100' length of 1/2" soft
|
|||
|
|
copper water pipe placed on plexiglas stand off insulators. The
|
|||
|
|
inside turn starts at 14" in diameter, and the turns wind
|
|||
|
|
outward to form a flat pancake spiral, like the grooves on a
|
|||
|
|
phonograph record. The outside turn is 36" diam.. There are a
|
|||
|
|
total of 15 turns in this coil, spacing between turns is 1/4".
|
|||
|
|
|
|||
|
|
I own two .1 mfd 45 kvac pulse discharging capacitors. These two
|
|||
|
|
custom commercial units were purchased to supplement my 14
|
|||
|
|
homemade polyethylene/aluminum flashing/mineral oil units rated
|
|||
|
|
at .02 mfd 10 kvac pulse. With the 10 KVA coil I use the two
|
|||
|
|
commercial "caps" in series with the primary, so the actual
|
|||
|
|
operating capacitance is only .05 mfd. (rated 90 KVAC though...).
|
|||
|
|
|
|||
|
|
I connect the capacitors to the primary coil and the spark gap.
|
|||
|
|
By using a movable "tap" lead which can clip to any location on
|
|||
|
|
the heavy primary coil, the primary coil inductance is varied,
|
|||
|
|
and the tank circuit frequency can be changed or "tuned".
|
|||
|
|
|
|||
|
|
The spark gap acts as a high voltage switch. When the gap is
|
|||
|
|
open, the capacitors charge. When the gap fires, the caps are
|
|||
|
|
discharged in a pulse. Because of the voltage and currents
|
|||
|
|
involved, the gaps on larger coils employ a rotary break, almost
|
|||
|
|
exactly like a large car distributor at high speed.
|
|||
|
|
|
|||
|
|
This pulse discharging produces a large current (over 1000a@20kv
|
|||
|
|
in my system) from a modest transformer output (.5 amp @ 20kv).
|
|||
|
|
The pulse "rings" (oscillates) from capacitor plate, through the
|
|||
|
|
coil, and back.
|
|||
|
|
|
|||
|
|
The secondary coil has a natural electrical resonate frequency
|
|||
|
|
dependant mostly on wire length. It may be modified or tuned by
|
|||
|
|
addition or subtraction of top capacitance or "discharge
|
|||
|
|
terminal". The two coils are tuned to the same frequency, and
|
|||
|
|
then energy is xfered from the primary to the secondary. This is
|
|||
|
|
the resonate transformer theory.
|
|||
|
|
|
|||
|
|
BG> Also, I'm interested in making a Jacob's Ladder. Do you have
|
|||
|
|
BG> any plans or ideas on that?
|
|||
|
|
|
|||
|
|
All you need is a neon sign xfrmr and a couple of coat hangers.
|
|||
|
|
Neons have built in current limiting. Do not construct a Jacob's
|
|||
|
|
Ladder with an xfrmr that is not current limited.
|
|||
|
|
... If all else fails... Throw another Megavolt across it!
|
|||
|
|
___ Blue Wave/QWK v2.12
|
|||
|
|
|
|||
|
|
|
|||
|
|
--- WM v3.10/93-0100
|
|||
|
|
* Origin: St. Louis Users Group BBS (314) 878-7614 (1:100/4.0)
|
|||
|
|
(1:100/4)
|
|||
|
|
|
|||
|
|
======================================================================
|
|||
|
|
=====
|
|||
|
|
BBS: WELCOM BBS
|
|||
|
|
Date: 07-08-94 (21:31) Number: 10768
|
|||
|
|
From: RICHARD QUICK Refer#: NONE
|
|||
|
|
To: DON KIMBERLIN Recvd: NO
|
|||
|
|
Subj: Tesla Coils Conf: (111) ELECTRONIC
|
|||
|
|
----------------------------------------------------------------------
|
|||
|
|
-----
|
|||
|
|
|
|||
|
|
RQ> DK> ...Nice sketch:
|
|||
|
|
RQ> DK> ...but where do you plug the microphone in? <smirkle>
|
|||
|
|
|
|||
|
|
Human voice T1
|
|||
|
|
\/
|
|||
|
|
3
|
|||
|
|
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><--Diaphram 3 L2
|
|||
|
|
<20> <20> V <20><--Valve ~A<><41><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>}
|
|||
|
|
<20> <20> <20> <20> 3 }
|
|||
|
|
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 3 }
|
|||
|
|
Gas in^ <20> 3 }
|
|||
|
|
Gas out> <20> 3 }
|
|||
|
|
<20> A1 3 } L1 C1
|
|||
|
|
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> >>>> } {<7B><><EFBFBD>'~A<><41><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> < HF
|
|||
|
|
Gas stream> 3 } { o
|
|||
|
|
3 } { G1 o
|
|||
|
|
3 } {<7B><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> < HF
|
|||
|
|
~A<><41><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>}
|
|||
|
|
3
|
|||
|
|
earth <20><><EFBFBD>
|
|||
|
|
|
|||
|
|
RQ>The "gas under pressure" microphone was placed in the circuit
|
|||
|
|
RQ>between the air capacity terminal (T1) and the ground. The
|
|||
|
|
RQ>modulated air stream would in turn modulate the arc at A1.
|
|||
|
|
DK> ....
|
|||
|
|
|
|||
|
|
DK> ...Sonofagun! Old (young) Tesla had it all! Interesting
|
|||
|
|
DK> situation occurs when trying to modulate extremely low
|
|||
|
|
DK> frequencies, however. Unless the ratio between the
|
|||
|
|
DK> modulating (speech) and modulated (radio) sigs is more than
|
|||
|
|
DK> about 1:10, a lot of problems with distorted speech occur.
|
|||
|
|
|
|||
|
|
Tesla mentions this effect several times in the COLORADO SPRINGS
|
|||
|
|
NOTES, both in reference to the circuit above, and in the carbon
|
|||
|
|
microphone circuits. He stated that the oscillations of the coil
|
|||
|
|
and the break rate on the gap had to be very rapid to reduce this
|
|||
|
|
effect and produce the clearest speech at the receiver; so it
|
|||
|
|
appears to me at any rate, that he was not only very aware of
|
|||
|
|
this problem, but that he had gone far towards solving it.
|
|||
|
|
|
|||
|
|
DK> Still, if the technology had ever gotten to wide use, I'm
|
|||
|
|
DK> sure he would have worked that out...
|
|||
|
|
|
|||
|
|
I think it was worked out. So many people fail to realize that
|
|||
|
|
Tesla designed and constructed not random inventions, but entire
|
|||
|
|
working systems. By "working systems" I mean things like the
|
|||
|
|
commercialized polyphase system in use today (and unchanged since
|
|||
|
|
Tesla first handed the patents to Westinghouse machinists).
|
|||
|
|
|
|||
|
|
Tesla stated all the way up to the time of his death in 1943 that
|
|||
|
|
his wireless system was far superior to any system in use. The
|
|||
|
|
example above is drawn from his experimental work of 1899 and
|
|||
|
|
prior, as are the carbon microphone systems I mentioned (and
|
|||
|
|
provided references for). What I find particularly impressive:
|
|||
|
|
his system required no sensitve detector (receiver - amplifier),
|
|||
|
|
and no external power supply, for a person to hear human voice at
|
|||
|
|
the receiving end (the transmitter being very powerful and
|
|||
|
|
efficient at delivering energy).
|
|||
|
|
|
|||
|
|
Tesla showed us fully developed triode vacuum tubes in 1891 in
|
|||
|
|
his public lectures (drawings, photos, and lecture transcriptions
|
|||
|
|
of the tubes exist). He was asked during his pending court case
|
|||
|
|
in 1916 why such tubes were not employed by him in receiver/
|
|||
|
|
amplifier circuits. He answered that in his "system" they were
|
|||
|
|
not required: that no amplification was. He was clearly quite
|
|||
|
|
familiar with the design, construction, and operation of these
|
|||
|
|
tubes before Deforest; but did no further study with them because
|
|||
|
|
the knowledge and use of these tubes were not required for voice
|
|||
|
|
transmission.
|
|||
|
|
|
|||
|
|
Tesla frustrates me time and time again for what he clearly
|
|||
|
|
documented but refused to employ/patent in some application;
|
|||
|
|
others grabbed credit for much of what was his original work.
|
|||
|
|
|
|||
|
|
... If all else fails... Throw another Megavolt across it!
|
|||
|
|
--- Blue Wave/RA v2.12 [NR]
|
|||
|
|
* Origin: Cindex Support BBS (314) 837-5422 Florissant, MO.
|
|||
|
|
(1:100/395.0)
|
|||
|
|
|
|||
|
|
======================================================================
|
|||
|
|
=====
|
|||
|
|
BBS: WELCOM BBS
|
|||
|
|
Date: 06-09-94 (16:52) Number: 12123
|
|||
|
|
From: RICHARD QUICK Refer#: NONE
|
|||
|
|
To: JAMES MEYER Recvd: NO
|
|||
|
|
Subj: Tesla Capacitors Conf: (111) ELECTRONIC
|
|||
|
|
----------------------------------------------------------------------
|
|||
|
|
-----
|
|||
|
|
|
|||
|
|
RQ> Flat plate caps have no inductance. Rolled caps contain two
|
|||
|
|
RQ> or more plates which are tightly rolled up. Rolled plates
|
|||
|
|
RQ> exhibit some properties of coils, they contain a certain
|
|||
|
|
RQ> degree of self-inductance.
|
|||
|
|
|
|||
|
|
JM> Rolled caps don't always have to show a lot of inductance.
|
|||
|
|
JM> With a slight modification to your construction techniques,
|
|||
|
|
JM> you could make "extended foil" caps with almost no
|
|||
|
|
JM> inductance. The inductance of an extended foil cap doesn't
|
|||
|
|
JM> change as they get bigger either.
|
|||
|
|
|
|||
|
|
Please tell me more. What slight modifications would be required,
|
|||
|
|
and how do those modifications reduce or eliminate self-
|
|||
|
|
inductance?
|
|||
|
|
|
|||
|
|
As I may have mentioned; the .02 uf 10 KVAC pulse discharging
|
|||
|
|
rolled capacitor (instructions which I have posted here several
|
|||
|
|
times) are self-resonant around 1.2 MHz. When I build larger caps
|
|||
|
|
of this design; the self resonance drops below 1 MHz where it
|
|||
|
|
interferes destructively with the tank circuit operation of
|
|||
|
|
smaller coils; these smaller coils are where the beginners start.
|
|||
|
|
|
|||
|
|
The second design limitation I have encountered is a lowering of
|
|||
|
|
the tank circuit Q factor when larger rolled caps are used in the
|
|||
|
|
oscillator. I attribute part of this to destructive self-reson-
|
|||
|
|
ance, but this can be controlled/reduced by operating the
|
|||
|
|
oscillator at lower frequencies, and maintaining a suitable
|
|||
|
|
spread between the self-resonate frequency of the cap, and the
|
|||
|
|
normal operating frequency of the oscillator. The destructive
|
|||
|
|
interference does not seem to account for the large drop in Q
|
|||
|
|
factor I read on my scope.
|
|||
|
|
|
|||
|
|
One problem with tank circuits is that the circuit Q factor drops
|
|||
|
|
off as the physical length of non-primary coil conductors
|
|||
|
|
increase. I have run physically large oscillators below 100 kHz,
|
|||
|
|
using up to 14 of the homemade .02 uf rolled caps in the circuit
|
|||
|
|
at one time, and the Q factor gets pretty poor. The bus wiring
|
|||
|
|
alone subtracts plenty of Q (even with great care you get tons of
|
|||
|
|
radiant surface area and off-axis inductance); but when I add up
|
|||
|
|
all of the plate lengths of the rolled caps, and include these
|
|||
|
|
lengths as a factor in the tank circuit wiring, it becomes clear
|
|||
|
|
that the wiring length of the circuit exceeds the primary coil
|
|||
|
|
length by several times. It seems that this must be avoided.
|
|||
|
|
|
|||
|
|
Where physically large layouts are common, that is at lower tank
|
|||
|
|
circuit frequencies (say below 175 kHz), I switch to flat stacked
|
|||
|
|
capacitors. When I switch, I see tank circuit Qs increase. This
|
|||
|
|
capacitor construction (flat plate) avoids the problem of self-
|
|||
|
|
inductance (&therefore self-resonance), but I see an increase in
|
|||
|
|
tank circuit Q that the self-inductance factor alone does not
|
|||
|
|
seem to account for.... It seemed to me the best course to limit
|
|||
|
|
the rolled cap design at .02 uf, and for larger capacitors, to
|
|||
|
|
switch over to a flat stacked capacitor design.
|
|||
|
|
|
|||
|
|
I am not at all trying to detract from the viability of your
|
|||
|
|
suggestion, which I would like to hear in more detail, but I am
|
|||
|
|
simply trying to outline and clarify some of the problems and
|
|||
|
|
design limitations I have encountered in the course of my
|
|||
|
|
experimentation.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... If all else fails... Throw another Megavolt across it!
|
|||
|
|
--- Blue Wave/RA v2.12 [NR]
|
|||
|
|
* Origin: Cindex Support BBS (314) 837-5422 Florissant, MO.
|
|||
|
|
(1:100/395.0)
|
|||
|
|
|
|||
|
|
======================================================================
|
|||
|
|
BBS: WELCOM BBS
|
|||
|
|
Date: 06-09-94 (18:24) Number: 12124
|
|||
|
|
From: RICHARD QUICK Refer#: NONE
|
|||
|
|
To: TERRY SMITH Recvd: NO
|
|||
|
|
Subj: Tesla, Col.Sprng Conf: (111) ELECTRONIC
|
|||
|
|
----------------------------------------------------------------------
|
|||
|
|
|
|||
|
|
My mail services have been poor to worse the last two weeks.
|
|||
|
|
No mail picked up for a nearly a week, then getting duplicates,
|
|||
|
|
not counting posts missed completely and late messages....
|
|||
|
|
|
|||
|
|
Anyway, Terry Smith and Don Kimberlin were commenting on some
|
|||
|
|
info I dug up on Tesla's Colorado Springs Magnifier....
|
|||
|
|
|
|||
|
|
TS> Interesting, yes, but nothing like what would be
|
|||
|
|
TS> characteristic of any height insulated vertical radiator,
|
|||
|
|
TS> with or without typical loading.
|
|||
|
|
|
|||
|
|
DK>...How about it, Terry? Can you figure what the field would
|
|||
|
|
DK> be like off a 94 kHz loading coil with a top hat? It sure
|
|||
|
|
DK> looks to be pretty "standard" in that regard...my first
|
|||
|
|
DK> guess says about 1.5 Amps average base current, but 1350
|
|||
|
|
DK> Amps peak base current...what a pulse!
|
|||
|
|
|
|||
|
|
TS> Based on 209 ohms and 420 kV, we might expect over 2,000 A at
|
|||
|
|
TS> the base. Extrapolating with the ratio of 31.5 and assuming
|
|||
|
|
TS> minimal losses, the arc might be around 60 A. That's
|
|||
|
|
TS> approaching a gigawatt.
|
|||
|
|
|
|||
|
|
TS> As to radiation efficiency, I'd be curious if any data
|
|||
|
|
TS> comparable to present day units existed. A 200 ohm base is
|
|||
|
|
TS> typical of a 120 degree or so tower. Loading of normal
|
|||
|
|
TS> radiators commonly does more to match impedances without
|
|||
|
|
TS> higher Q networks, than to boost radiation efficiency. The
|
|||
|
|
TS> near zero Vf, and indication (based on what?) of 70 degree
|
|||
|
|
TS> wavelength, conflict with normal radiator modelling, as does
|
|||
|
|
TS> a VSWR so much greater than 2.
|
|||
|
|
|
|||
|
|
TS> I'd be curious, but afraid to even guess. I would speculate
|
|||
|
|
TS> that fields from some of the coils might cancel, but that
|
|||
|
|
TS> there'd be some radiation from both the long coil, and the
|
|||
|
|
TS> arc path. How much I'd guess would depend a lot on
|
|||
|
|
TS> construction practices, not shown here. If I had to pick a
|
|||
|
|
TS> number to compare with equivalent transmitting power into an
|
|||
|
|
TS> efficient radiator, I'd guess this might be similar to around
|
|||
|
|
TS> a megawatt, though low duty cycle. Is there any historical
|
|||
|
|
TS> field data?
|
|||
|
|
|
|||
|
|
The whole idea of the Colorado Springs Experimental Station was
|
|||
|
|
to verify Tesla's previously discovered methods of transmitting
|
|||
|
|
communications and electrical power without wires. The system was
|
|||
|
|
not designed, built, or operated at as radiating transmitter. The
|
|||
|
|
Magnifer circuit was operated at industrial power levels to
|
|||
|
|
perfect a method of wireless global transmission thru conduction.
|
|||
|
|
|
|||
|
|
References to radiation efficiency completely miss the point of
|
|||
|
|
the experiment. Tesla stated over and over that his goal was to
|
|||
|
|
supress radiation and increase conductivity. This is why the
|
|||
|
|
system was required to produce such high voltages.
|
|||
|
|
|
|||
|
|
The posted values were derived from only one of many dozens of
|
|||
|
|
experiments Tesla performed with the equipment at hand, and is
|
|||
|
|
"typical" in showing the type voltages, currents, and frequencies
|
|||
|
|
Tesla worked with at the station between 1899-1900.
|
|||
|
|
|
|||
|
|
The famous spark photos from the Colorado Springs lab were taken
|
|||
|
|
solely to publicize to power processing ability of the machine,
|
|||
|
|
and does not document the primary function of the oscillator/coil
|
|||
|
|
system. It could also be surmised that spark length gave a good
|
|||
|
|
relative indication of system tune given the absence of any
|
|||
|
|
reliable commercial diagnostic equipment in 1899-1900.
|
|||
|
|
|
|||
|
|
|
|||
|
|
... If all else fails... Throw another Megavolt across it!
|
|||
|
|
--- Blue Wave/RA v2.12 [NR]
|
|||
|
|
* Origin: Cindex Support BBS (314) 837-5422 Florissant, MO.
|
|||
|
|
(1:100/395.0)
|
|||
|
|
|
|||
|
|
======================================================================
|
|||
|
|
=====
|
|||
|
|
BBS: WELCOM BBS
|
|||
|
|
Date: 07-09-94 (20:55) Number: 12220
|
|||
|
|
From: JAMES MEYER Refer#: NONE
|
|||
|
|
To: RICHARD QUICK Recvd: NO
|
|||
|
|
Subj: Tesla Capacitors Conf: (111) ELECTRONIC
|
|||
|
|
----------------------------------------------------------------------
|
|||
|
|
-----
|
|||
|
|
|
|||
|
|
On 09-06-94, RICHARD QUICK wrote to JAMES MEYER and said:
|
|||
|
|
|
|||
|
|
RQ> Please tell me more. What slight modifications would be required,
|
|||
|
|
RQ> and how do those modifications reduce or eliminate self-
|
|||
|
|
RQ> inductance?
|
|||
|
|
RQ>
|
|||
|
|
RQ> I am not at all trying to detract from the viability of your
|
|||
|
|
RQ> suggestion, which I would like to hear in more detail, but I am
|
|||
|
|
RQ> simply trying to outline and clarify some of the problems and
|
|||
|
|
RQ> design limitations I have encountered in the course of my
|
|||
|
|
RQ> experimentation.
|
|||
|
|
|
|||
|
|
An extended foil cap is wound with the foil extended over the
|
|||
|
|
edge of the dielectric so that the connection to the foil can
|
|||
|
|
be made continuously along the entire edge of the foil. This
|
|||
|
|
means that the charging currents are distributed over the
|
|||
|
|
foil much more evenly and the effective series inductance is
|
|||
|
|
the same as a piece of wire the same length as the cap.
|
|||
|
|
|
|||
|
|
Perhaps a picture right now would be worth a thousand more
|
|||
|
|
words.
|
|||
|
|
|
|||
|
|
"A" "B"
|
|||
|
|
------------------------------- ^
|
|||
|
|
| dielectric | | r
|
|||
|
|
---| -------------------------------- | o
|
|||
|
|
| f | | foil 2 | | l
|
|||
|
|
| o | | | | l
|
|||
|
|
| i | | | |
|
|||
|
|
| l | | | | t
|
|||
|
|
| | | | | h
|
|||
|
|
| 1 | | | | i
|
|||
|
|
| | | | | s
|
|||
|
|
---| -------------------------------- |
|
|||
|
|
| "D" | | w
|
|||
|
|
------------------------------- "C" - a
|
|||
|
|
y
|
|||
|
|
|
|||
|
|
"A" to "B" is the length of the finished cap. (One foot?)
|
|||
|
|
"B" to "C" is the length of the foil before rolling.
|
|||
|
|
(Several yards?)
|
|||
|
|
|
|||
|
|
The cap is made by laying down one sheet of dielectric of the
|
|||
|
|
proper size. Next goes one foil plate placed so that one
|
|||
|
|
edge extends past the edge of the dielectric by about a
|
|||
|
|
quarter to a half inch.
|
|||
|
|
|
|||
|
|
The second dielectric sheet is exactly the same size as the
|
|||
|
|
first, and it gets laid down so the corners match the corners
|
|||
|
|
of the first.
|
|||
|
|
|
|||
|
|
The second foil is the same size as the first and it goes on
|
|||
|
|
next, but it is extended to the opposite side as the first
|
|||
|
|
foil.
|
|||
|
|
|
|||
|
|
Of course you want the dielectric sheets larger than the foil
|
|||
|
|
by enough to get the arc-over voltage high enough.
|
|||
|
|
|
|||
|
|
Then the cap is rolled up. The two foils will be extended
|
|||
|
|
from opposite ends of the cap. It's then only a matter of
|
|||
|
|
attaching the two terminals to the foils. Since the entire
|
|||
|
|
edge of both foils is available, a good high current
|
|||
|
|
connection can be made. If you use a hammer to pound the
|
|||
|
|
turns of each foil into contact, you could then solder a real
|
|||
|
|
heavy piece of copper strap or a threaded brass rod to the
|
|||
|
|
foil at each end.
|
|||
|
|
|
|||
|
|
This is how physically small caps with low inductance are
|
|||
|
|
made. It's also how the large, pulse discharge, caps in the
|
|||
|
|
modulator for the linear particle accelerator at the lab are
|
|||
|
|
made. I know. I've dissected a couple after they "blew".
|
|||
|
|
|
|||
|
|
You could take apart a few old small caps to get an idea
|
|||
|
|
about how they're made. The "orange drop" Sprague caps are
|
|||
|
|
usually extended foil.
|
|||
|
|
|
|||
|
|
Jim
|
|||
|
|
|
|||
|
|
* JABBER v1.2 * The earth is like a tiny grain of sand, only =much=
|
|||
|
|
bigger.
|
|||
|
|
--- FidoPCB v1.5 beta-'j'
|
|||
|
|
* Origin: Psychotronic BBS - We are smarter than you. RTP,NC (1:3641/1)
|
|||
|
|
|
|||
|
|
======================================================================
|
|||
|
|
BBS: WELCOM BBS
|
|||
|
|
Date: 08-09-94 (07:46) Number: 12237
|
|||
|
|
From: TERRY SMITH Refer#: NONE
|
|||
|
|
To: RICHARD QUICK Recvd: NO
|
|||
|
|
Subj: Tesla, Col.Sprng Conf: (111) ELECTRONIC
|
|||
|
|
----------------------------------------------------------------------
|
|||
|
|
|
|||
|
|
RQ> Anyway, Terry Smith and Don Kimberlin were commenting on some
|
|||
|
|
RQ> info I dug up on Tesla's Colorado Springs Magnifier....
|
|||
|
|
|
|||
|
|
TS> Interesting, yes, but nothing like what would be
|
|||
|
|
TS> characteristic of any height insulated vertical radiator, TS> with
|
|||
|
|
or
|
|||
|
|
without typical loading.
|
|||
|
|
|
|||
|
|
DK>...How about it, Terry? Can you figure what the field would
|
|||
|
|
DK> be like off a 94 kHz loading coil with a top hat? It sure
|
|||
|
|
|
|||
|
|
TS> Based on 209 ohms and 420 kV, we might expect over 2,000 A at
|
|||
|
|
TS> the base. Extrapolating with the ratio of 31.5 and assuming
|
|||
|
|
TS> minimal losses, the arc might be around 60 A. That's
|
|||
|
|
TS> approaching a gigawatt.
|
|||
|
|
|
|||
|
|
TS> As to radiation efficiency, I'd be curious if any data
|
|||
|
|
TS> comparable to present day units existed. A 200 ohm base is
|
|||
|
|
TS> typical of a 120 degree or so tower. Loading of normal
|
|||
|
|
TS> number to compare with equivalent transmitting power into an
|
|||
|
|
TS> efficient radiator, I'd guess this might be similar to around
|
|||
|
|
TS> a megawatt, though low duty cycle. Is there any historical
|
|||
|
|
TS> field data?
|
|||
|
|
|
|||
|
|
RQ> The whole idea of the Colorado Springs Experimental Station was
|
|||
|
|
RQ> to verify Tesla's previously discovered methods of transmitting
|
|||
|
|
RQ> communications and electrical power without wires. The system was
|
|||
|
|
RQ> not designed, built, or operated at as radiating transmitter. The
|
|||
|
|
|
|||
|
|
RQ> References to radiation efficiency completely miss the point of
|
|||
|
|
RQ> the experiment. Tesla stated over and over that his goal was to
|
|||
|
|
RQ> supress radiation and increase conductivity. This is why the
|
|||
|
|
|
|||
|
|
Don and I were simply trying to compare apples and oranges, or place the
|
|||
|
|
secondary characteristics of this coil in the realm of references we
|
|||
|
|
consider when looking at RF devices of substantial fractional wavelengths.
|
|||
|
|
It's normal to look at induced and radiated fields of a broadcast antenna,
|
|||
|
|
coupling efficiency to the earth, and the earth resistance in conducting
|
|||
|
|
that signal. Tesla's signals obviously have some overlap, though it does
|
|||
|
|
appear to be a much different balance of parameters than in intentional
|
|||
|
|
RF radiators.
|
|||
|
|
|
|||
|
|
You must realize how most components or circuits for one nominal purpose
|
|||
|
|
can usually be analyzed as to the (albeit, somtimes minute) elements of
|
|||
|
|
other types. For example, you can measure series inductance of many
|
|||
|
|
resistors, shunt and series resistance of capacitors, inter winding
|
|||
|
|
capacitance and series resistance of inductors, etc.
|
|||
|
|
|
|||
|
|
|
|||
|
|
RQ> The famous spark photos from the Colorado Springs lab were taken
|
|||
|
|
RQ> solely to publicize to power processing ability of the machine,
|
|||
|
|
RQ> and does not document the primary function of the oscillator/coil
|
|||
|
|
RQ> system. It could also be surmised that spark length gave a good
|
|||
|
|
RQ> relative indication of system tune given the absence of any
|
|||
|
|
RQ> reliable commercial diagnostic equipment in 1899-1900.
|
|||
|
|
|
|||
|
|
Ahh, you're just jealous that with modern technology, you haven't been
|
|||
|
|
able to build something twice as large. <<g>>
|
|||
|
|
|
|||
|
|
|
|||
|
|
Terry
|
|||
|
|
|
|||
|
|
--- Maximus 2.01wb
|
|||
|
|
* Origin: Charges filed under Ohms Law! (203)732-0575 BBS (1:141/1275)
|
|||
|
|
|
|||
|
|
======================================================================
|
|||
|
|
BBS: WELCOM BBS
|
|||
|
|
Date: 09-09-94 (11:19) Number: 12267
|
|||
|
|
From: DON KIMBERLIN Refer#: NONE
|
|||
|
|
To: RICHARD QUICK Recvd: NO
|
|||
|
|
Subj: Tesla, Col.Sprng Conf: (111) ELECTRONIC
|
|||
|
|
----------------------------------------------------------------------
|
|||
|
|
|
|||
|
|
<Terry Smith posted:>
|
|||
|
|
|
|||
|
|
RQ>TS> I'd be curious, but afraid to even guess. I would speculate
|
|||
|
|
RQ>TS> that fields from some of the coils might cancel, but that
|
|||
|
|
RQ>TS> there'd be some radiation from both the long coil, and the
|
|||
|
|
RQ>TS> arc path. How much I'd guess would depend a lot on
|
|||
|
|
RQ>TS> construction practices, not shown here. If I had to pick a
|
|||
|
|
RQ>TS> number to compare with equivalent transmitting power into an
|
|||
|
|
RQ>TS> efficient radiator, I'd guess this might be similar to around
|
|||
|
|
RQ>TS> a megawatt, though low duty cycle. Is there any historical
|
|||
|
|
RQ>TS> field data?
|
|||
|
|
|
|||
|
|
RQ>The whole idea of the Colorado Springs Experimental Station was
|
|||
|
|
RQ>to verify Tesla's previously discovered methods of transmitting
|
|||
|
|
RQ>communications and electrical power without wires. The system was
|
|||
|
|
RQ>not designed, built, or operated at as radiating transmitter. The
|
|||
|
|
RQ>Magnifer circuit was operated at industrial power levels to
|
|||
|
|
RQ>perfect a method of wireless global transmission thru conduction.
|
|||
|
|
|
|||
|
|
SET MENTAL_BLOCK.SYS /on
|
|||
|
|
|
|||
|
|
...Oh, boy, do I have trouble with that, Richard. As you note,
|
|||
|
|
"radiation" does imply propagation of magnetic or static fields
|
|||
|
|
through space. But "conduction" implies propagation of induction
|
|||
|
|
fields through the earth. Then, we have some sort of Tesla
|
|||
|
|
experiments involving what has to be radiating X-rays and such
|
|||
|
|
toward the ionosphere.
|
|||
|
|
|
|||
|
|
...Please sort out my feeble mind. While I have no problem with
|
|||
|
|
understanding Tesla could have been working on both radiation and
|
|||
|
|
conduction as I know them, it seems like the descriptions don't
|
|||
|
|
separate the two...unless there is some higher plane of
|
|||
|
|
understanding I need to get to. (Yes, the two are related, but
|
|||
|
|
usually we're concentrating on one and trying to suppress the
|
|||
|
|
other...)
|
|||
|
|
|
|||
|
|
RQ>References to radiation efficiency completely miss the point of
|
|||
|
|
RQ>the experiment. Tesla stated over and over that his goal was to
|
|||
|
|
RQ>supress radiation and increase conductivity. This is why the
|
|||
|
|
RQ>system was required to produce such high voltages.
|
|||
|
|
|
|||
|
|
...Again, when it's conduction, the emphasis is on current,
|
|||
|
|
not voltage...at least for ordinary mentalities...can you help
|
|||
|
|
get my perspective right for this understanding?
|
|||
|
|
|
|||
|
|
--- GOMail v2.0j Beta [94-0035]
|
|||
|
|
* Origin: Borderline! BBS Kannapolis, N.C. (1:379/37)
|
|||
|
|
|
|||
|
|
======================================================================
|
|||
|
|
=====
|
|||
|
|
BBS: WELCOM BBS
|
|||
|
|
Date: 11-09-94 (13:10) Number: 12291
|
|||
|
|
From: BRETT LILLEY Refer#: NONE
|
|||
|
|
To: RICHARD QUICK Recvd: NO
|
|||
|
|
Subj: Tesla Capacitors Conf: (111) ELECTRONIC
|
|||
|
|
----------------------------------------------------------------------
|
|||
|
|
-----
|
|||
|
|
|
|||
|
|
Hi Richard, I have followed the Teslar thread here with interest even to
|
|||
|
|
the cost of obtaining copies of your videos via Jim Oliver.
|
|||
|
|
|
|||
|
|
They are most impressive although I make a plea no doubt endorsed by
|
|||
|
|
other viewers, PLEASE INVEST IN A TRIPOD FOR YOUR CAMERA. I get sea sick
|
|||
|
|
watching them :-(
|
|||
|
|
|
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|
|
I have around 15 years experience in radio, mostly at VHF and UHF and
|
|||
|
|
Microwaves but my training included the LF, MF and HF bands. Your Tesla
|
|||
|
|
coils operate at the lower end of the LF bands.
|
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|
|
|
|||
|
|
> RQ> Flat plate caps have no inductance.
|
|||
|
|
|
|||
|
|
Wrong! all capacitors have inductance as well as series and shunt
|
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|
|
resistance and of course capacitance. It is just that flat plate caps
|
|||
|
|
have much less inductance and at LF frequencies it provides insignificant
|
|||
|
|
reactance. However even at LF frequencies an effect known as Skin effect
|
|||
|
|
can result in a significant effective series resistance, more about
|
|||
|
|
that later.
|
|||
|
|
|
|||
|
|
> RQ> Rolled caps contain two
|
|||
|
|
> RQ> or more plates which are tightly rolled up. Rolled plates
|
|||
|
|
> RQ> exhibit some properties of coils,
|
|||
|
|
|
|||
|
|
They are coils!
|
|||
|
|
|
|||
|
|
> RQ> they contain a certain degree of self-inductance.
|
|||
|
|
|
|||
|
|
Not surprising, Knowing their capacitance and self resonant frequency you
|
|||
|
|
should be able to calculate their inductance.
|
|||
|
|
|
|||
|
|
fc = 1/(2*pi*(L*C)^-2) or L = 1/((2*pi*fc)^2*C)
|
|||
|
|
|
|||
|
|
> JM> Rolled caps don't always have to show a lot of inductance.
|
|||
|
|
> JM> With a slight modification to your construction techniques,
|
|||
|
|
> JM> you could make "extended foil" caps with almost no
|
|||
|
|
> JM> inductance. The inductance of an extended foil cap doesn't
|
|||
|
|
> JM> change as they get bigger either.
|
|||
|
|
|
|||
|
|
> Please tell me more. What slight modifications would be required,
|
|||
|
|
> and how do those modifications reduce or eliminate self-
|
|||
|
|
> inductance?
|
|||
|
|
|
|||
|
|
One method would be to terminate each plate at its edge rather than its
|
|||
|
|
ends by extending the edge of one plate beyound the insulator at one end
|
|||
|
|
of the roll and doing the same with the other plate at the other end. You
|
|||
|
|
could then bond across all the turns of each plate. This would reduce the
|
|||
|
|
inductance (and the series resistance!) by making the effective length of
|
|||
|
|
conductor the width of the plate rather than the length of the plate.
|
|||
|
|
You would of course have to double the "creepage" allowance of insulator
|
|||
|
|
at the edges of the plates (ends of the roll).
|
|||
|
|
|
|||
|
|
> The second design limitation I have encountered is a lowering of
|
|||
|
|
> the tank circuit Q factor when larger rolled caps are used in the
|
|||
|
|
> oscillator. I attribute part of this to destructive self-reson-
|
|||
|
|
> ance, but this can be controlled/reduced by operating the
|
|||
|
|
> oscillator at lower frequencies, and maintaining a suitable
|
|||
|
|
> spread between the self-resonate frequency of the cap, and the
|
|||
|
|
> normal operating frequency of the oscillator. The destructive
|
|||
|
|
> interference does not seem to account for the large drop in Q
|
|||
|
|
> factor I read on my scope.
|
|||
|
|
|
|||
|
|
You are encountering skin effect. At frequencies higher than about 100khz
|
|||
|
|
current flow in a conductor only occurs near the surface thus reducing the
|
|||
|
|
effective cross sectional area and increasing the effective series resistance.
|
|||
|
|
This effect will occur in all parts of your primary tank circuits and in
|
|||
|
|
the secondary coil. The usual method of countering this is to use conductors
|
|||
|
|
with a large surface area for a given cross section. Ie. compare the surface
|
|||
|
|
area per unit length of a flat conductor vs a round conductor of the same
|
|||
|
|
cross sectional area. Other techniques effective at LF include the use of a
|
|||
|
|
multi stranded conductor where each strand is insulated (Litz wire).
|
|||
|
|
|
|||
|
|
I definately don't proffess any experience in the area of Tesla coils but
|
|||
|
|
hopethat a little cross pollenation with radio theory will help eliminate
|
|||
|
|
some of your problems.
|
|||
|
|
|
|||
|
|
Bye.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
* Origin: Brett's Point (Co-Sysop of The Beast - 64 7 3575355)
|
|||
|
|
(3:774/600.4)
|
|||
|
|
|
|||
|
|
======================================================================
|
|||
|
|
BBS: WELCOM BBS
|
|||
|
|
Date: 19-09-94 (16:12) Number: 12788
|
|||
|
|
From: RICHARD QUICK Refer#: NONE
|
|||
|
|
To: DON KIMBERLIN Recvd: NO
|
|||
|
|
Subj: Tesla, Col.Sprng Conf: (111) ELECTRONIC
|
|||
|
|
----------------------------------------------------------------------
|
|||
|
|
|
|||
|
|
RQ>The whole idea of the Colorado Springs Experimental Station
|
|||
|
|
RQ>was to verify Tesla's previously discovered methods of
|
|||
|
|
RQ>transmitting communications and electrical power without
|
|||
|
|
RQ>wires. The system was not designed, built, or operated at as
|
|||
|
|
RQ>radiating transmitter. The Magnifier circuit was operated at
|
|||
|
|
RQ>industrial power levels to perfect a method of wireless
|
|||
|
|
RQ>global transmission thru conduction....
|
|||
|
|
...
|
|||
|
|
RQ>The high voltage and RF frequencies means that large amounts
|
|||
|
|
RQ>of energy can be conducted freely through low pressure gas
|
|||
|
|
RQ>(a-la waveguide) where there is no radiating wave propagation.
|
|||
|
|
|
|||
|
|
DK> ...Hmmm...I'm right with you fine up to this point, but it
|
|||
|
|
DK> sure seems that "conduction channel" would have to be focused
|
|||
|
|
DK> toward the ionosphere somehow...
|
|||
|
|
|
|||
|
|
I am not sure that Tesla was aware of the existance of the
|
|||
|
|
ionosphere, nor that it matters much. Practical lab experiments
|
|||
|
|
of scale test systems can be performed by any coiler worth his
|
|||
|
|
salt. A four inch diameter coil (transmitter) and a six inch
|
|||
|
|
diameter coil (receiver) can be set up in transmitter/receiver
|
|||
|
|
configuration. The four inch coil is heavily top loaded with
|
|||
|
|
capacitive air terminal (toroid) to prevent spark breakout. Top
|
|||
|
|
loading the four inch coil will also reduce to coil resonate
|
|||
|
|
frequency to the point where a frequency match can be made with
|
|||
|
|
the unloaded, or slightly loaded, six inch coil. I connect the
|
|||
|
|
base of the two coils to a common ground, and run an 8 foot long
|
|||
|
|
florescent tube, or two tubes with the ends pressed and taped
|
|||
|
|
together between the two air terminals of the coils. Real power
|
|||
|
|
can be transmitted through the tube. I have no problems pumping
|
|||
|
|
through a killowatt or two. At a threshold voltage, which depends
|
|||
|
|
on gas pressure and composition, the low pressure gas becomes
|
|||
|
|
self ionizing, and conducting.
|
|||
|
|
|
|||
|
|
DK> ... and I don't know of any focusing devices Tesla used for
|
|||
|
|
DK> that...otherwise, I'm right here with you -- I think...
|
|||
|
|
|
|||
|
|
I am afraid I cannot give a precise answer to this question of
|
|||
|
|
beam focusing devices. Alas there are acknowledged holes in the
|
|||
|
|
documentation of Tesla's advanced work. Many of these gaps were
|
|||
|
|
deliberate on Tesla's part to throw off the competition. Yet we
|
|||
|
|
get closer and closer every year. Serious study, and experi-
|
|||
|
|
mentation, leads us to bridges over these gaps. In all of the
|
|||
|
|
work I have personally conducted, I have found no flaws in
|
|||
|
|
Tesla's basic logic.
|
|||
|
|
|
|||
|
|
DK> ...Was the Magnifier a focusing device for the conductive
|
|||
|
|
DK> beam?
|
|||
|
|
|
|||
|
|
No, the Magnifier is a name for a specific three coil arrangement
|
|||
|
|
which represents a power processing efficiency breakthrough.
|
|||
|
|
Tesla always strove for high efficiency, and the Magnifier gave
|
|||
|
|
it to him in a RF resonate tuned transformer of enormous power.
|
|||
|
|
|
|||
|
|
|
|||
|
|
DK> ...But, now that we have it going up, how do we tap into it
|
|||
|
|
DK> to get it down?
|
|||
|
|
|
|||
|
|
I would have to assume that the receiver plugged in the same way
|
|||
|
|
as the transmitter.
|
|||
|
|
|
|||
|
|
An interesting thing about this system is that it uses a
|
|||
|
|
resonator for the final stage to deliver the high EMF output.
|
|||
|
|
In the same simplified scale experiment I briefly described
|
|||
|
|
above, the receiving coil is still processing energy even if the
|
|||
|
|
conductive channel (low pressure tube) is not connecting the air
|
|||
|
|
terminals. A "free" (not inductively coupled to the transmitter
|
|||
|
|
system) resonator will pick up and resonate on ground current
|
|||
|
|
alone. No air terminal conductive channel is required for the
|
|||
|
|
system to deliver some considerable energy to the receiver
|
|||
|
|
through ground conduction alone. Enough voltage is present on the
|
|||
|
|
air terminal of the receiving coil to cause it to spark freely,
|
|||
|
|
light bulbs, etc.. I have gotten bulbs to light on a tuned
|
|||
|
|
receiving coil 1/4 mile away from a shielded transmitter. The
|
|||
|
|
input energy to the transmitter was only one killowatt, there was
|
|||
|
|
no raditaion: the "pickup" or receiving coil was connected to
|
|||
|
|
a 50' length of aluminum flashing sunk in creek bottom. There are
|
|||
|
|
some interesting properties to Tesla's open ended resonators.
|
|||
|
|
|
|||
|
|
It appears that a large scale system would deliver enough energy
|
|||
|
|
from the ground connection alone to open up a conductive channel
|
|||
|
|
to the stratosphere (via X-Ray, UV bulbs on the air terminal of
|
|||
|
|
the receiver).
|
|||
|
|
|
|||
|
|
|
|||
|
|
... If all else fails... Throw another Megavolt across it!
|
|||
|
|
--- Blue Wave/RA v2.12 [NR]
|
|||
|
|
* Origin: Cindex Support BBS (314) 837-5422 Florissant, MO.
|