Tube Amp Archive

Fixed : I bot a bad batch of 100K resistors. They have the good color code but measure only 100 Ohms. With the Ohmeter I read 100 Ohms but didn't take care about the little "Kohms" which was missing on the right. :oops: My three board now, are working very well. I must confess that it made crazy. Th...

Oh, and the volume and tone pots dont do anything.

Before the PI (pins 6,7,8 of V2)? Or before the 2nd gain stage (pins 1,2,3 of V2)? What about the Volume/Tone controls? The signal is weaker than normal after the coupling cap just before the Volume pot. I believe (i try to remember) that it almost disappears after the first triode of the PI. I rem...

So, you built a dozen working 5E3's and now two in row that don't work? Troubleshooting these things is always easier with a scope or at least a probe that can send the signal to another working amp. Oh, and fuse should always go on the Hot/Line. Yes that's the reason why I changed the fuse's place...

Hello guys, I built at least one dozen of 5e3 and I am very happy with the results : no hum, pretty gound tone, good overdrive etc … But I have an issue with my new build and I must confess that I am lost now, after spending many many hours to try to debugg the amp. So every comment is desired. I fe...