Bitx40 audio screech

mark bodlovich
 

New build bitx40. Rx audio fine untill  volume control turned way down. Then a horrible screeching sound. Maybe needs a resistor across the volume control to give a min load. Idk what do you guys think? Using allards sketch attempting callbration. Things are getting tricky. 

Join BITX20@groups.io to automatically receive all group messages.