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Original Message
FWIW the GRAAF GM 200 and the GM 20 are quite different.
Posted by Ralph on February 1, 2012 at 12:26:40:
Its been a long time since I've seen the schematic, but if I recall right, the GM 20 uses the output section power supplies to also operate the input section; I don't *think* the GM200 uses that same technique.