The Amp Garage

Try it with the power tubes removed. Sounds like bad tubes or fried output xfmr. With power tubes removed I get the voltages that I've shown on the last chart uploaded (only measured gz34 and the voltages coming to the power tube sockets). I suspected the OT may be fried, measured the resistance be...

so the voltages are good across the amp now? whole thing? I don't know. Should I put every tube, plug the speakers and read the voltages?, the values that I've provided look ok-ish? Edit. I tried to measure everything with all tubes plugged. Out of nothing I decided to test the cable that I was usi...

1. Measured the voltages on the rectifier tube socket, I think it looks fine. 2. After that, I've plugged the GZ34 and measured again, remember that no other tube are plugged. A voltage chart available online (I'm attaching that too) says that I should be getting 400 VDC on pin 2-8, I've got 462 VD...

Heya Jose! When you say you turned the amp on and it was unloaded (no speakers) and you say there were lights and sounds.. so you played through the amp and truned the volume way up because it made no sound at first? If the tubes looked like lightning and they made sounds like rattlesnakes.. the ou...

Hello guys, my name is José, recently I was modifying/rewiring my old JTM45 build in order to take out some annoying hum noises that -I think- were product of a faulty build when I was a teenager. Years and years have passed, not playing a single note on my amp, mainly because it’s too loud for my r...