• 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.

FET Phase inverter to drive valve PA

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This is from a French design, the "Pacific" (magazine Maison de l'Audiophile).
The input stage was meant to drive a PP EL84 output stage.
It runs on some +/- 80 volt.
Very good design; will make a fine sounding amplifier.
When reading French is no problem I can post a link to the complete article.
 

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