Tube Amp Archive

Thanks for the replies. This is a testament to the chopstick method: I opened the amp up and turned it on, the first thing I touched with the chopstick (a lug on my post volume pot) revealed a cold solder joint. I reflowed the joint and all the symptoms disappeared! Wouldn't it be nice if everything...

Hi all, thanks for the forum and thanks in advance for any advice to my amp problem. I built a plexi based amp from Doug Hoffman plans and parts. I recently installed the hotswitch mod which made it switchable from stock to cascaded preamp / master volume. Since then, I have played the amp for proba...