RM20 no sound after a couple minutes

[reprimand]

Thought it was a tube but I replaced everything and it still dies down to no sound after a few minutes from standby. Could it be a cap gone bad? Diodes, failing resistor. Not sure what to look for if anyone has experienced this or has an idea. I’m stumped. Not the module as it does it with anything I put in it.

[SpitfireMusic]

Sorry for the late reply but in reality it’s probably going to be best to get this to a qualified repair tech to test things. Unless you are savvy and knowledgeable with this stuff I only mention this as there are lethal voltages inside any tube amp.

In reality with what you are describing assuming it’s not a tube or loose speaker connection it’s possible this is a failing output transformer.