Tube Amp Archive

A light bulb is placed in parallel with the speaker jack. The bulbs cold resistance is very low and hot resistance is high. The thought is that at low volume levels (if you find the right bulb, this only includes hum and hiss) all current from the transformers secondary passes through the bulb and n...

I just got a good deal on some 470uF 450wv snap-in capacitors which I would like to hook in series to yield 235uF 900wv. They will be going into a Ampeg V2 head which has 595V on the plates of the output tubes, thus the necessary series connection. It currently has ~37uF before the plates and 20uf o...