[R-390] R392

[Charles Steinmetz]

Guido wrote:

>  There is some popping before it come back
>  so I suspect a bad cap in the audio section.

If the volume control has no effect, the problem would appear to be in 
the audio section (V606, V607, V608 and associated circuitry).

Bad cap is certainly one possibility, but don't forget the most common 
source of such problems, namely noisy contact between tube pins and 
their sockets.  To check, just put your finger on top of each tube (one 
at a time) and wiggle it a little.

Best regards,

Charles