"N_Cook" wrote in message ...

Valve amp, little used then stored for 3 years now very low level
wanted, undistorted output and constant buzz, minimum wiht middle
setting of A/AB pot on rear.
Good signal out of SEND and bad output from test signal in RET, so PA
problem. Nothing seen weeping nor dodgey solder.
I was hoping S/R bypass switch corrossion but not that.



That A/AB pot on the back is a bit weird from memory. Does it kind of turn
one output tube off?



Cheers,


Gareth.