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RE: I made me kind of a quasi tertiary winding in a dynaco ST70.

Mike,

I you tried grounding the output cathode through the secondary of the OPT transformer....you're puttin some DC on the crossover and driver but I have not yet experienced any issues...I'm using this method of feedback on my PP EL84 build...along with UL connections, the little Pentodes are tame and rich....I love the sound in straight Pentode but the distortion levels are too high when driving less efficient loud speakers...

Have Fun

Stuben


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