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OTL, Output Transformerless Amplifier User Group.

RE: Harvard Electronics H-1 OTL Amp

Spectacular! JF is for Julius Futterman, of course. I actually have a hand-written set of instructions for biasing my H3aa's, sent to me by Julius, and I recognize the handwriting. He was a nice guy. Whatever you do to restore the function of the amplifier, don't eradicate that note.


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