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OTL, Output Transformerless Amplifier User Group.

RE: MP Engineering OTL

Take a look at the schematic. This appears to very similar to the Futterman H1. These use the same 12B4A power tube (although a lot more of them), the same 6AU6 driver and the same 6S4 inverter.

I am, by no means, an expert in this field but I am willing to learn all I can. I look forward to any comments, thoughts, advice and/or recommendations any of you my have as I go through the process of bringing these gems back to life.

Let me know your thoughts.

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