• 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.

Direct replacement for 5Z3PA and 5Z3P Rectifier


I am wondering if the Russian 5C3S / 5U4G SVETLANA tubes are direct replacement for 5Z3PA and 5Z3P Chinese Tubes?

Would like to change the Chinese tubes because both had been "sparking" occasionally a few seconds after the power is turn on. Do not want the "sparking " to destroy anything in the SE amps i am using now.

Any advise would be most appreciated.

Thank you.