• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Fundamentals of tube amp design


2007-10-07 9:17 pm
I recently bought a WE91-styled amplifier kit so that I could learn about tube amps and in the process build one.

Unfortunately, the instructions for the amp are both incomplete and inaccurate, and they don't explain anything, they just show you what to do. The schematic doesn't match up with either the rest of the instructions or what actually comes in the kit.

I built the amp as best I could, and the finished product has a lot of hum. In order for me to diagnose & fix this hum, I need to learn how the amp works & why.

I've built other kits (from Bottlehead) and I know other types of eletronics well. I've done a fair amount of research but the one thing I can't find is a basic primer on the elements of tube amp.

Does anyone have any links?

And if anyone is in the NYC area, I'd be utterly grateful for some help.