In Reply to: RE: 12AT7 runs fine on either 6.3 or 12.6 V........ posted by vinnie2 on August 4, 2017 at 18:35:55:
You would connect one wire from your 6.3V source to the centertap of the 12AT7 filament, and the other wire to both ends of the filament tied together.
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Follow Ups
- RE: 12AT7 runs fine on either 6.3 or 12.6 V........ - Triode_Kingdom 19:48:51 08/04/17 (0)