• 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.

Schematic for a Fountain Gemsonic 10-10 valve amp

Late reply to this, as I just had to look at one of these amps.
Here's the cct I have:
 

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