[Elecraft] Audio volume problems

[Jan Ditzian]

I suddenly came up with several problems related to audio volume on my 
K3, MCU 4.51.

I was listening on USB with slow AGC and I noticed that the volume would 
suddenly drop and remain low until I hit the T/R button, whereupon it 
would come back again, and then disappear.  I switched to fast AGC and 
the problem diminished but did not disappear.  So I reached for the 
audio volume control and discovered that it now turns 360 degrees 
without a stop, although there is a slight detent at the regular 
stopping point.  I tried to turn AGC off, and although the display 
indicates that it is off, there appears to be no increase in volume.  I 
now feel that the volume is lower than it was when I first built the unit.

There may be some troubleshooting to do here.  I notice this less with 
strong signals.  I guess I would like to know what to do about the 
rotation first, and then pursue the overall volume problem.

Thank you,

Jan, KX2A