I see posts about 5687 as driver tube 1:1 transformer coupled to GM70 in SE amp. And the Gm70 running in 1200-1250V. I wonder whether the driver has enough voltage swing for this purpose??
I have my GM70 operating at 1000V.
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Topic - 5687 for GM70?? - Lawrence_triode 07:39:48 02/16/12 (2)