In Reply to: RE: Electronic Transformer heating for the gm70 test posted by used-hifi on January 28, 2017 at 17:50:25:
The transformers in my SETs run at 60-66kHz. Hum can be nulled with a pot, just like any other AC-driven filament. I wouldn't even consider using a DC system.
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Follow Ups
- RE: Electronic Transformer heating for the gm70 test - Triode_Kingdom 20:18:25 01/28/17 (1)
- RE: Electronic Transformer heating for the gm70 test - used-hifi 21:27:31 01/28/17 (0)