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Original Message
RE: how to remove feedback loops
Posted by rage on June 11, 2017 at 15:10:01:
there is other stuff going on there after that driver tube that may be related to the feedback loop.
you might want to try the el cheapo amp or even look at the original st35. both have feedback but simpler circuits. the st35 could be built with a 12ax7 and 12au7 for the cathodyne phase splitter. el cheapo uses a differential pair with a ccs which i prefer.