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RE: Trusty McShaned Eico HF87

Hi,
If my memory is correct the output transformers are better suited for fixed bias operation.
Using the HF89 schematic as a guide I converted my HF 87 several years ago, I felt it was a night and day improvement. Even with a Mcshane style PS. and otherwise stock HF 87 I still preferred a stock Dyna ST 70 over the cathode bias HF 87. After changing the HF 87 to fixed bias the HF 87 far outdistanced the Dyna ST70
.

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