• 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.

PP Triode Choice & Output Impedance

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JasonWatkins

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Joined 2018
I built a stereo/pair of the cascode schematic using the non-doubled supply. It turned out to be 184 volts under load, so a little higher than I remembered. The only thing I changed was the cathode bypass cap since I didn't have a 150uF on hand. I put a 330uF in instead. I took two 6GC5s and triode-strapped them for the output. That was suggested earlier for 6V6s and I happened to have two 2.5k edcor OPTs very similar to the 12k ones I just ordered. These are just the SE version of the same series. It sounds really nice. Fat and punchy I guess but that's what I like. Current is still a little low but this is night and day better than the resistance coupled circuit that I played with earlier. I can still build that and take measurements if it would be helpful.
 

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