Tube Amp Archive

Is you PT somehow isolated from the chassis? It should be bolted directly to the chassis making it electrically the same potential as your (grounded) chassis. For that matter, is the chassis truly grounded? I would check it against the ground prong of the power cord with a meter. Also don't rule ou...

You need to rewire that amp to a three prong cord and get rid of the death cap ASAP. Be sure to ground the green wire to it's own screw and nut through the chassis. Thanks, I appreciate it.... In my orig. post I mentioned that I've already removed the death cap and wired the AC cable exactly like y...

I recently acquired a 57’ tweed Pro amp that has quickly become a “desert island” amp for me. After playing thru the amp for several days with no problems, I noticed a strange hum-like sound at the start of a session. The amp still has the ground switch / death cap circuit, so I flipped the ground s...