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.

Question 6p3p*2 Class A valve amp - put the wrong valves in - it's broken...

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If you want to change the tubes, with no modifications, russian 6P3S-E and 6N1P-EV. Perfect equivalents.

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