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OTL, Output Transformerless Amplifier User Group.

RE: I believe Julius would have called those "H3a"




H3a was my guess, too, until I found this image in rhinohifi714's gallery that's identified as an H3a.

Looking at photos of the H3aa, I now think that the ones in my possession are early, hard-wired versions. Later, more finished looking builds replace the single cap with six smaller ones, but otherwise appear to be very similar.

George Kaye is still active. He's in Brattleboro, VT, and has a site called kayeaudiolabs.com. I also found references elsewhere on the OTL Asylum to a retired NYAL engineer named Ted Hammond, in Croton, NY, who also worked on them. However, health issues may have limited his activities.

Joe



Edits: 04/02/15

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