In Reply to: ideas on variable filament supplies? posted by vinnie2 on July 21, 2015 at 13:15:06:
If you have a separate filament transformer, you can connect a variable resistance in series with the 120VAC primary side. Value depends on load current, try a 10 Ohm pot, wired like a rheostat. A 2 watt pot should be sufficient.
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: ideas on variable filament supplies? - Alpha Al 13:23:42 07/21/15 (15)
- RE: ideas on variable filament supplies? - vinnie2 03:55:08 07/22/15 (14)
- 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)
- RE: ideas on variable filament supplies? - amnesiac 04:51:44 07/22/15 (4)
- RE: ideas on variable filament supplies? - BofService 07:49:34 07/23/15 (3)
- RE: ideas on variable filament supplies? - Triode_Kingdom 08:13:07 07/23/15 (2)
- RE: ideas on variable filament supplies? - amnesiac 22:42:51 07/23/15 (1)
- RE: ideas on variable filament supplies? - lugnut1 06:09:38 07/24/15 (0)