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Part 15 AM Transmitter

B

BobOnTheJob

This goes back to my youth...just wondering if anyone else ever put together a 100mw AM by taking a 160 meter ham rig, leaving the oscillator and buffer stage active (50 volts @ 2ma IIRC) and placing a 600 ohm to 5000 ohm (or was it 10000 ohm?) transformer in series with the 'high voltage' and feeding the output of the audio processor directly to the 600 ohm side of the transformer? I believe 20dbm is 100mw of audio...far more than needed for 100% modulation. Seems it sounded mighty good with no 'modulator' stage involved...
 
I did something similar. I used the external exciter from a Gates BC1D. I think it had a 807 as the output . I put a transformer in the plate circuit and fed it with a 50 watt Bogen PA amp. Not what I would call part 15. The antenna was an inverted V strung from the top of my 110 foot ham radio tower. It got out pretty good and if I had understood anything about matching it to the antenna I am sure it would have worked even better.
About 35 years ago.. This was when radio was fun, now its work.
Robert
 
rew,

You're probably one of two engineers who have ever seen a Gates 1D. I'm the other one.
I've done similar things .... many years ago.
Those were the days .........
 
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