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RE: FWIW the GRAAF GM 200 and the GM 20 are quite different.

Posted by Lew on February 1, 2012 at 13:18:26:
I briefly looked at the schematic that Luca provided, and I do believe I saw a separate supply for the front end of the GM20. But the output tubes shown on the GM20 schematic are unlabeled triodes, which I believe to have been 6C33Cs. Whereas the GM200 is using something else for outputs that appear to be pentodes. In a circlotron, which the GM20 is, could one run the front end off one or both of the output supplies, successfully? I would not have thought so.