• 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.

Futterman H-3

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Joined 2013
Hello, MR Koonw,

T thank you very much for this
information,

Sincerely

John.

No problems, but I made a little error in upper screen ground, here it's corrected.
 

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