In Reply to: dc filament heating posted by RayP on May 31, 2017 at 12:25:29:
You know, now that you mention it, they must be ac, because I remember when we were building them we had trouble measuring the voltage because of the frequency. Wouldn't have that problem with dc, now would we? Good catch.
Edits: 05/31/17
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- RE: dc filament heating - vinnie2 12:32:00 05/31/17 (0)