• 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.

APPJ PA0901A() schematics

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Any luck? Mine was just breaking in, opening up, and giving me lots of joy (2 months, with JJ EL84's and a mystery 12ax7), when it went dark today. Power fuse good, power switch lights up, tubes don't... boo! Nothing looks naff inside, but I'm not really qualified to prod much further.
 
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