Tube Amp Archive

Figured it out finally, I talked to my dad this evening, he has been fixing tube equipment since the 1960s and said that it sounds like I have a grounding problem. Before when I had been working on this I either had on my boots or shoes and was pretty much isolated from ground, this time I was in a ...

move the Volume and Tone controls out of it and onto the ends of two shielded 3 ft. long RG-58 cables Did you ground the new control panel back to the amp chassis? Mark Both controls are getting their ground through the cable shielding, they have not been mounted in the new control panel yet, altho...

I have two Stromberg-Carlson AU-34 tube amplifiers they both work fine as-is and don't have any problems putting out nice clean sound. Tubes: 1st pre-amp = 6SF5 2nd pre-amp = 6N7 Output = Two 6L6GC's (push-pull) Rectifier = 5U4 Several months ago I decided to modify one of them and built a wooden ca...