[AMRadio] BC1-J Mod trans. is fine.

Bob Bruhns bbruhns at erols.com
Thu Mar 21 12:18:45 EST 2002


Modulator oscillation when the TX is on the antenna is probably
caused by RF getting into the audio circuits and being rectified,
producing audio which results in feedback.  Add RF filtering to the
audio inputs; a few turns around those square Radio Shack cores
helps too.  If everything is open, try shielding too (closed boxes,
etc).

  Bacon, WA3WDR


> >> works fine into a dummy but the
> >> modulator oscillates when into the antenna. I still need to
clean up the
> >> transmitter side of things. But there's hope.
> >>
> >> Dan





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