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OTL, Output Transformerless Amplifier User Group.

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Thanks.

Posted by Lew on December 28, 2015 at 05:42:21:
For your far superior explanation of the ZOtl circuit. When I wrote my own response, I was in no position to research the subject, was relying on fragmentary memory of an early review of the first such amplifier to come from DB; I think it was in Positive Feedback. This is not to say that I understand the circuit as well as you apparently do.