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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: RE: ideas on variable filament supplies? posted by Alpha Al on July 24, 2015 at 04:34:43:
You were right about it being way too high a value; that was because I did not have a load on the transformer. Duh! With the tube filament connected into the circuit we need to get down to about 2.5k for the pot value to get a useful range of voltage. Trouble is then you get a hot pot after running it a few minutes. Going to have to break down and do a little math and figure what rating I need and theh shop around for a rheostat with the proper specs. It may not be the universal solution I first thought it could be, but it might still work for giving me an adjustable filament supply on my test mule bread board. Hopefully this will still be a simpler, cheaper solution than a $60 variac.
Edits: 07/24/15 07/24/15
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