• 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.

Mystery tube

A friend ask me if i can repair a vintage DIY PA tube amp he own. I found a bad
diode but there's no identification on the power tubes, externally they are very similar to 6V6GT but the number of pins is different. Someone know?
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A friend ask me if i can repair a vintage DIY PA tube amp he own. I found a bad
diode but there's no identification on the power tubes, externally they are very similar to 6V6GT but the number of pins is different. Someone know?



It is 6P6S Russian electronic tube, see pictures below:
 

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