The Amp Garage

I don’t think you need to know the basics of how amps work to fix the thing, No shame in asking a professional for help if you get in too deep. Thank you. I have re-heated cold joints and replaced components on circuit boards before and feel confident. I have opened this amp before and am aware of ...

Thanks, I’ll figure it out and do it.

Okay, power to tubes is in series so that makes sense. I will want to check / resolder the entire circuit.

I know what a resistor looks like, how do I identify/ locate the plate resistors you are talking about?

You have failing and or bad solder connections on the tube sockets, as such is common with this amp, and I would say at least one bad plate load resistor. If it were a solder connection on the tube sockets wouldn’t it just effect the tube in that socket? All of the power tubes went dark and came ba...

So here is where I am at so far; While the problem(s) are almost constant, the static sometimes goes away for a while, and the power tube shutdown only happens here and there, which may make finding the problem difficult. The static is not a tube problem. If it was V1 the volume control would effect...

Here is something new, before I went to try swapping out the preamp tubes one at a time with an extra I have, I turned the amp on to play a little. The crackle started immediately, then it went totally silent and passed no signal. I looked in back and the power tubes were all dark. After less than a...

Have you tried swapping the tubes out? Describing a hiss, rather than a hum... Swapping the tubes out is the easiest and quickest to check. Not just reseating them, you understand, but replacing them. Thanks for the reply. I would not describe the sound as a hiss or hum. It is a more of a crackling...

Hey, I could use some help from a one of you repair tech types. I have an older Peavey classic 30 that is usually super reliable, but it has developed an annoying static noise. Pots are all clean. The first thing I tried was re-seating all of the tubes. That did not help. It is not very loud and tur...