I have 90's Ampeg Reverberocket that has a loud static buzz on the clean channel (does not get louder with increase in volume), and it also makes a "popping" noise when switching to and from the clean channel. The buzz does not happen on the dirty channel.
Here's what it is not:
1. Tubes (tried several sets, current set is new and biased correctly)
2. Resistors (all resitors in the signal path check out with a multi-meter, including the ones that run to ground)
3. Solder joints on the daughter board that the tubes plug into, which look good and shiny
I am at the point where I need to disassemble the amp to access the main board to check the relays, small caps, and solder joints (filter caps have been drained).
I suspect it may have something to do with the relay, given the nature of the problem. Does anyone have experience fixing a similar problem? Was it caused by the relay or something else?
