[Elecraft] K3 - Right "speaker" problem - works only when SUB is on

[Jim Miller]

K3 #1442, sub rcvr, plus.

 

Any ideas guys?  Same symptoms, always right side, either speakers or
headset.  

 

Was intermittent - no longer,  If not using the SUB receiver, there is no
audio out of the right speaker (where the SUB is directed).  Switching
(button) the A/B VFO frequencies still has right speaker not working (just a
comment and doubt that has anything to do with it).  Speakers connected in
back and headset connected in the front.

 

What other info do you need for isolation?

 

What else can I try/test to isolate?

 

What is the most likely cause?

 

Thanks, 73, Jim KG0KP