[AMRadio] DX-100B on Phone - bad audio distortion / oscillation

[Rick Poole]

At 10:09 PM 12/4/2011, wb3fau at att.net wrote:

 >>>>>
>Or, maybe the antenna is the problem?  lets try  running  it  into a
>good  dummy load and see what  it  does...
<<<<<

I have done that from the very beginning, in fact the transmitter fed 
a dummy load exclusively for more than a week as I went through the 
process of getting the station up and running.  The problem shows up 
only occasionally, when running on a dummy load.  I have a field 
strength meter and the level of RF in the shack, while present, is 
very low, no higher than with my rice boxes and Collins station, none 
of which are affected... or my computers (3 of them), two of which 
are very susceptible to RF interference and show no ill effects.

Thinking it might be related to SWR, I put a tuner in the line 
immediately after the transmitter and tuned to 1:1 SWR, no beneficial effect.

Right now I'm waiting until my 6146A's show up, to replace the 
6146B's that are in there now, and will take it from there.