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OTL, Output Transformerless Amplifier User Group.

RE: Harvard Electronics H-1 OTL Amp


I think that 12B4A power triode which looses almost all getter have to be replaced with fresh one , just to attain future stable balance of output SEPP power stage for next period of amp use ,
but there is so many other things that have to be Very Very Carefully checked and examined before that old H1 will be again in power on condition , and ready for use , it is so old ,
and check that old power cable since from your pics seems to me that it is in not so good condition at place of trough chassis input plastic receptor ,
and if is possible add some more pics , especial from under the chassis ,
and one question , did that person from which you have bought this amp have maybe one more H1 ? , since it will be cool to find another one for your stereo system use ,
anyway is great thing that you have recognized and saved very significant piece of audio amp history .


"Art which does not have the appearance of art is true art."
- Old Roman saying -

Edits: 02/13/16

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