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OTL, Output Transformerless Amplifier User Group.

The small circuit board

Unless I'm mistaken, Ralph is liking the idea of a solid state constant current source. There are a great many plus'. Though I can't remember what they are?.

The biggest advantage, and this is huge, it frees up a 6SN7. Your M60 now has two input tubes, like the MA-1, I think?.

If I'm not mistaken, this drops distortion to really low levels.

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