Re: uBitx with first mod and question

Bob Benedict, KD8CGH
 

More info on the mod. I added wires:
  from the volume wiper to the rotary center.
  from rotary position 1 to Audio connector (original wiper destination) 
  rotary 2 & 3 to AF filter in
  AF filter out to tie point at rotary rotary 1 (back to Audio connector)

I tried replacing the wires with shielded mono audio cable with one end of shields tied together and grounded but it didn't help.
The filter itself is on a perfboad mounted to the right edge of the speaker so it is also very near the Raduino.

Any suggestions on next thing to try?

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