135 lines
6.0 KiB
Plaintext
135 lines
6.0 KiB
Plaintext
CBBS(R) 4.0.3b
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07/07/91 21:15:15
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Y/N: want CBBS "1st time user" info?^U
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?^U
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?^U
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?n;ward;christensen;odraw;;fullc;piss
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Logging name to disk...
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You are caller 222486; next msg =44959; 379 active msgs.
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Prev. call 07/06/91 @ 23:25, next msg was 44954
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Recording logon for next time...
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Use FULL? to check assignments
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?^U
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?xxxxx
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"Mine" command checking for msgs TO you,
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>Function:?dir c:log;dir c:killed;dir summary;type-20 log,ward c;or;*;short
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LOG. 8
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KILLED. 15
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SUMMARY. 25
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07/05/91,22:52:06,222447,2,WARD CHRISTENSEN,,
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E#44949,3
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07/05/91,22:58:14,222448,2,JOHN SERRANO,,1
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47,222463,2,WARD CHRISTENSEN,,
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E#44954,3
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07/07/91,00:11:51,222464,9,TONY ANTONUCCI,,5
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07/07/91,01:08:43,222465,2,BILL MATTSON,,1
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07/07/91,01:43:53,222466,9,ERIC BOHLMAN,,
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E#44955,6
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07/07/91,05:50:25,222467,2,BILL WOLFF,,1
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07/07/91,09:18:02,222468,2,MARTY DIPPEL,,17
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07/07/91,09:44:46,222469,9,BEN TEIFELD,,1
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07/07/91,09:55:59,222470,2,MARTY DIPPEL,,33
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07/07/91,14:14:03,222471,3,BORIS KUKSO,Chicago/ IL,21
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07/07/91,14:46:25,222472,2,JOHN SERRANO,,1
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07/07/91,15:13:45,222473,2,BILL WOLFF,,1
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07/07/91,16:23:01,222474,2,CHRIS KING,CHGO/ IL,7
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07/07/91,16:28:42,222475,2,JERRY HASLETT,,
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>Help: G] !"(,Y>Y2[WYGVB.SY,
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07/07/91,16:52:44,222476,3,MURRAY ARNOW,,
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E#44956,29
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07/07/91,17:23:14,222477,2,DONNIE STUHLMAN,,3
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07/07/91,17:33:06,222478,2,BILL WOLFF,,
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E#44957,3
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07/07/91,17:46:35,222479,1,BOB CLARK,Chicago,16
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07/07/91,18:04:13,222480,1,BOB CLARK,,7
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07/07/91,18:22:28,222481,1,DAVID JOHNSON,,4
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07/07/91,18:50:17,222482,1,DAVID JOHNSON,,6
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07/07/91,20:04:03,222483,1,ERIC LEFEBER,Chicago IL,6
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07/07/91,20:39:27,222484,1,RICHARD GOZDAL,,7
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07/07/91,21:07:47,222485,2,BILL WOLFF,,
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E#44958,2
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07/07/91,21:15:19,222486,2,WARD CHRISTENSEN,,
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44954 07/06/91 WARD CHRISTENSEN => JERRY OLSEN: "R/INTNL. SHAREWARE SOURCES"
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44955 07/07/91 ERIC BOHLMAN => BILL WOLFF: "R/REFERENCE BOOK"
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44956 07/07/91 MURRAY ARNOW => BILL WOLFF: "R/CRT LIFETIMES"
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44957 07/07/91 BILL WOLFF => ERIC BOHLMAN: "R/REFERENCE BOOK"
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44958 07/07/91 BILL WOLFF => MURRAY ARNOW: "R/CRT LIFETIMES"
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---- End of summary ----
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Retrieving flagged msgs: C skips, K aborts.
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Msg 44954 is 02 line(s) on 07/06/91 from WARD CHRISTENSEN
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to JERRY OLSEN re: R/INTNL. SHAREWARE SOURCES
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Are you on Compuserve? There is a forum called "IBMEUR" (Europe)
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which could give you a good start!
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Msg 44955 is 03 line(s) on 07/07/91 from ERIC BOHLMAN
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to BILL WOLFF re: R/REFERENCE BOOK
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There's a second edition of Horowitz and Hill, dated 1989. Among other
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things, they completely rewrote the chapter on FETs. Definitely worth
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the money.
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Msg 44956 is 21 line(s) on 07/07/91 from MURRAY ARNOW
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to BILL WOLFF re: R/CRT LIFETIMES
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I'll quickly answer your questions. If you want more detail look at the
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Handbook of Materials and Techniques for Vacuum Devices by Walter Kohl
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(Reinhold, 1967) andColor Television Picture Tubes by Albert Morrell, et. al.,
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(Academic Press,1974). I beleive both books are out of print, but your library
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may have copies. This is a very mature industry and new books aren't in demand.
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Now, the getter is always functioning until it gets exhausted, which may or may
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not happen during the life of a tube. The better the tube is processed the
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less outgassing and getters last forever. The tube needs not to be operating
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for barium getters to function. A barium getter operates this way. A device
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holding a barium suspension in an aluminum matrix is welded to the gun. The
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device often called the getter is heated after the tube has been pumped and
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sealed. The barium is vaporized during the heating and is deposited on the
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inside of the tube, usually on the envelope and mask. Barium is an active
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metal and combines with the residual gases in the tube to form barium compounds
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The barium coating the mask is going to be exposed to electron beam
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bombardment. The x-rays usually are created here. The coating on the funnel
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is not at ground it is at the screen voltage. It is there to form a field
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free region so the electron beam isn't defelected by electrostatic forces.
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By the way I've been involved in electronics design for about 20 years,
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ranging from tubes to chips, voltages from 150KV down to nanovolts. Thanks,
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for your references. If I get a chance I'll look at it.
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Msg 44957 is 03 line(s) on 07/07/91 from BILL WOLFF
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to ERIC BOHLMAN re: R/REFERENCE BOOK
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Hi Eric! I should have known that you would have one one those reference
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books and a 1989 edition at that. You can be sure that I'll be checking out
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the newer version. Where did you get yours at?
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Msg 44958 is 21 line(s) on 07/07/91 from BILL WOLFF
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to MURRAY ARNOW re: R/CRT LIFETIMES
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Thanks again Murray! The knowledge you shared sure illustrated a great
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deal. I must say there is a big distinction between high vacuum systems and
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vacuum tubes. The system I used to work on had to be reopened to air from
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time to time. The getter system used in CRT's just couldn't handle this
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mistreatment. Yet on the other hand, if we had a getter that always
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performed, that sounds really convenient.
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If you didn't know, electron microscopes go up to 1 million volts. Many of
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the ones I was close to, created 120KV to 400KV. Some used oil as an
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insulator and some used SF6 gas. Some of the circuits that I had to check,
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required to be within one millionth of a volt. Tightfisted specifications
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huh? It had to be, as the error would then would be magnified one million
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times. It was tough finding a differential voltmeter. I even had to make my
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own to get by. Maybe that is why they only hired engineers.
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It was also my job to interface electron microscopes to computers with
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imaging packages. Not fun when you were the first one doing them. I've
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learned they are still doing them just the way I had designed the first
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few. That is good, but there were some things I would have liked to have
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done differently if I had the time. Was it that way with you as well? By
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the way, thank you for the references. I am very likely to check them out.
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No dup. chars.
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>Function:? |