• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
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    the safety precautions around high voltages.

Favorite noval hi gain dual triode?

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So what's your favorite 9 pin high gain dual triode? Obvious choices are 12AX7 or russian 6N2P.

BTW, if you want to know the application, I'm thinking of using an Aikido PCB as the driver board for a 6L6 amp, so mu needs to be twice what's needed to take line level up to drive the 6L6.
 
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