Hi Al and all,
> Also, I had to think about this for a minute -- I believe Ken is mixing his
> transmitter models (not that it's any big deal, just brings back memories HI
> HI!!) RCA used _4-400s_ in the BTA 1R transmitter at the small-town AM
> station I worked for early in my broadcast career.
>
I may be wrong about the model number (thought it was BT1K), I am sure
the old RCA TX at KVEC 920 kHz in San Luis Obispo used four 833As. It
probably was a parallel pair, and not push-pull finals. Definitely
push-pull modulator. They also had a newer TX (brand name I can't
remember, NOT RCA) that used 4-400s. That one was purchased used from a
station formerly on 1030 kHz (or something like that) and the "engineer"
(not a General Class or better ham by the way) neglected to retune the
second harmonic trap from 2060 kHz to 1840 kHz. They had quite a signal
on 160 meters. In fact it exceeded FCC part 73 rules. They refused to do
anything about it until I made measurements and sent the results to the FCC.
DE N6KB
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