134 lines
4.6 KiB
Plaintext
134 lines
4.6 KiB
Plaintext
FM KITS FROM FREE RADIO BERKELEY
|
|
|
|
First, a word from our legal department:
|
|
|
|
For educational purposes only. These kits are offered for the furtherance
|
|
of one's knowledge regarding radio frequency design and principles. At all
|
|
times during operation the assembled unit must be connected to a dummy
|
|
load. Part 15 of the FCC rules prohibits an antenna being used with these
|
|
units. All responsibilities for the ultimate use of these kits are born
|
|
solely by the builder and/or operator.
|
|
|
|
|
|
KITS AVAILABLE NOW !
|
|
|
|
|
|
All kits are complete and come with professionally manufactured, drilled
|
|
and tinned PC boards. All coils are pre-wound. Each unit, unless
|
|
specified, requires 12 volts for proper operation. Full instructions and
|
|
diagrams included.
|
|
|
|
|
|
5 Watt FM Transmitter - $50
|
|
|
|
An improved version of the Panaxis 5 watt design with a much more
|
|
rugged output transistor capable of producing 5-6 watts. Oscillator is a
|
|
stable FET based VFO. It is mono unit that accepts line level input (i.e.
|
|
an audio signal from a tape deck, mixer, etc.). A fine frequency
|
|
adjustment control makes keeping on frequency an easy adjustment.
|
|
Requires 12 to 14 volts DC at 3/4 to 1 amp for operation.
|
|
|
|
|
|
6 watt RF Amplifier - $25
|
|
|
|
Uses the same output transistor as above. It is designed to boost low
|
|
wattage transmitters to a bit higher output power and will produce 6 watts
|
|
for 1/2 watt input drive. Easy, quick assembly. Requires 12-14 volts DC
|
|
at 3/4 to 1 amp for operation.
|
|
|
|
|
|
15 watt RF Amplifier - $45
|
|
|
|
Uses a very high gain (14dB, power gain of at least 25X) RF transistor
|
|
to boost a 1/2 watt input to 15 watts. Easy, quick assembly. Requires
|
|
12-14 volts at 2 amps for operation.
|
|
|
|
|
|
20 -24 watt RF amplifier - $95
|
|
|
|
$95 might sound a bit steep, but for those who do not wish to do an
|
|
extensive amount of soldering and tuning, this is kit is for you. It uses
|
|
a broadband high gain, RF power module which will put out a 20-24 watt
|
|
signal for only a 100 to 200 milliwatt input. Kit requires less than 20
|
|
solder connections to complete, including a 5 element filter. Since the
|
|
module is broadband from 88 to 108 Mhz no tuning is required, plug and play
|
|
as they say. Requires 12-14 volts at 3 to 4 amps.
|
|
|
|
|
|
25-30 watt RF Amplifier - $55
|
|
Will produce full power with an input drive of 3-5 watts. This unit
|
|
works very well with the 5 watt transmitter kit. In fact, next to the 5
|
|
watt kit, it is our most popular item. Easy assembly. Includes heatsink.
|
|
Requires 12-14volts DC at 4-5 amps for operation.
|
|
|
|
1/2 to 1 watt Amplifier - $20
|
|
|
|
1/2 to 1 watt output for an input power of 10 mw. Great for boosting
|
|
lower power VFOs and low power FM kits
|
|
|
|
|
|
Output Filter Kit - $8.00
|
|
|
|
A seven element low pass filter, composed of 4 coils and 3 capacitors,
|
|
to flatten those harmonics. Specify cutoff frequency desired, 94 Mhz,
|
|
100 Mhz, 104 Mhz, 108 Mhz. The cutoff should be about 2 to 4 Mhz above
|
|
the frequency the transmitter is set for.
|
|
|
|
Dummy Load Kit - $10.00
|
|
|
|
Essential for tuning up and testing transmitters and amplifiers.
|
|
Will handle 15 watts without any strain, higher powers for a briefer
|
|
period of time (i.e. shut down when it gets rather hot). Will be making
|
|
50 and 100 watt units available soon.
|
|
|
|
|
|
|
|
1/2 - 1 watt Stereo Broadcast Transmitter - $50
|
|
|
|
A vast improvement over the Ramsey FM-10. It uses the BA1404 IC as a
|
|
stereo modulator only to modulate a FET vfo, buffer and amp chain. Better
|
|
audio input filtering and bypassing. IC voltage regulation for the 2.5
|
|
volt supply for the BA1404. A very rugged output stage and collector
|
|
voltage bypassing make this unit stand out from all other transmitter
|
|
designs using the BA1404 chip.
|
|
|
|
NEW ITEMS TO BE INTRODUCED BY APRIL
|
|
|
|
Stereo Audio Processor - $Price to be determined
|
|
|
|
A combined stereo generator using the BA1404 coupled with compandor ICs for
|
|
limiting of audio signals
|
|
|
|
|
|
75 Watt Amplifier Kit
|
|
|
|
150 Watt Amplifier Kit
|
|
|
|
2-4 Watt AM & SW Transmitter kit with companion 25-50 watt amplifier kit
|
|
|
|
2-3 watt UHF TV transmitter kit with 15 & 50 watt amplifier kits
|
|
|
|
Antenna kits for a 2 bay dipole, j-antenna, colinear, slim jim designs
|
|
|
|
|
|
If you have any other particular requirements please let us know. Custom
|
|
design and fabrication services are available including PC layout and
|
|
production. Full CAD services as well.
|
|
|
|
|
|
Proceeds from the sales of these kits go to the furtherance of micro power
|
|
broadcasting, bringing a voice of empowerment to every community.
|
|
|
|
Please add $3.00 for handling and shipping for each kit. Add $2.00 for 2nd
|
|
day mail service for each kit.
|
|
|
|
Payment to be made out to Free Radio Berkeley
|
|
|
|
Free Radio Berkeley
|
|
1442 A Walnut St., #406
|
|
Berkeley, CA 94709
|
|
|
|
Voice mail: (510) 464-3041
|
|
|
|
Net mail: frbspd@crl.com
|