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In Reply to: Pretty boxes.. posted by bare on June 5, 2017 at 13:02:08:
I agree the ST-70 is not the best, about the only thing that is really pretty good is the output transformers. I rebuilt my brother's ST-70 using the K&K mod (transformer phase splitter, 6n23p-ev differential driver stage, and differential power stage using NOS 6s3p-e tubes), shunt regulated power supply, and beefed up power transformer, run in triode mode, no negative feedback. Not much ST-70 about it anymore other than the chassis and output transformers. Sounded PDG.
twystd
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- RE: Pretty boxes.. - twystd 19:22:22 06/05/17 (0)