• 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.

6DQ6 for audio power amp?

The "red board" uses sweep tubes and can be used as a guide. Personally I think that sweep tubes make great audio amplifiers. If I can be of any help, please feel free to email me @ [email protected]


I have a warm spot in my heart for this tube as it's the first I used as a ham radio transmitter.

By "Red Board" -- do you mean: DCPP Amp