In Reply to: RE: ideas on variable filament supplies? posted by vinnie2 on July 22, 2015 at 03:55:08:
In the primary side, current is low. A low power pot or rheostat would work fine there. It is common practice in high-power radio transmitters to adjust filament voltage, where filament current can be 20-30 amps. A low current adjustment in the 120VAC primary side is the way to do it.
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Follow Ups
- RE: ideas on variable filament supplies? - Alpha Al 05:19:00 07/22/15 (8)
- RE: ideas on variable filament supplies? - vinnie2 04:54:15 07/23/15 (7)
- RE: ideas on variable filament supplies? - Alpha Al 09:31:09 07/23/15 (6)
- RE: ideas on variable filament supplies? - vinnie2 10:04:08 07/23/15 (5)
- RE: ideas on variable filament supplies? - Alpha Al 11:26:13 07/23/15 (4)
- RE: ideas on variable filament supplies? - vinnie2 12:30:12 07/23/15 (3)
- RE: ideas on variable filament supplies? - Alpha Al 04:34:43 07/24/15 (2)
- well rats! - vinnie2 14:13:26 07/24/15 (0)
- RE: ideas on variable filament supplies? - vinnie2 12:09:52 07/24/15 (0)