Tube Amp Archive

As I recall some 100W Marshalls ran plate voltage and load impedance that implied excessive dissipation, at or above the 238% calculated for the Hiwatt, but thanks to significant voltage sag at high current draw, they were reasonably reliable. Cloners who spec'd transformers with better regulation ...

First off why do want to push them so hard, and second how many watts are you looking to durive out of them? At this point, I'm just trying to understand what's possible and what isn't. I've seen circuits that pull 150 watts from a pair, but they aren't suitable for guitar use (Class B, and far too...

I'm trying to build a Class AB amp using a pair of KT-88s without melting them down. I would like to push them as far as they can go, but no farther. My "worst case" is a square wave (representing a heavily clipped signal) at B+/2. I understand that the conventional wisdom is that at B+/2, the plate...