In Reply to: RE: HK Citation V posted by sony6060 on April 29, 2021 at 11:30:29:
The only parallel to this that I've seen has been the old Akai/Roberts reel-to-reel tube amp. The EF86 head preamp has its own filament winding and hum pot. The winding is labelled 5.7V, not 6.3V. I've never known why this was done. Noise reduction would make sense, although I'm not sure it would be so beneficial in a line-level stage like the 12BY7.
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Follow Ups
- Interesting - Triode_Kingdom 12:19:17 04/29/21 (0)