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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: Anyone Ever Make their Own Filament Supply Inductors posted by garryR on January 31, 2007 at 09:59:31:
If the lams are interleaved you might find that it's not as easy to take them apart as you hope, but I'm not one to discourage diy experimentation. :) If you can find surplus chokes that are already gapped (all the E's together on one side, all the I's on the other) then it's a lot easier to reuse the cores. Florescent light ballasts are gapped. The ones I've seen are too small for this, but I haven't seen them all.18ga wire would be ok for a single 300B (1.2A current) but for a 2A3 (2.5A) I would go with #16.
"Don't you want poor high freq response in C-L-C filament supply. If yes then who cares how well you wind the thing."
I think you want as high a resonant frequency as possible to filter out the high frequency trash (i.e. as little capacitance as possible between turns.) A sloppy hand wind will tend to have less capacitance than a tight machine wind. :) You just end up with fewer turns (less inductance) and need a bigger gap (less inductance still.)
Having said all of that, Jeff Medwin's ultrafi chokes from Signal Transformer Co. seem to be made exactly for this kind of low voltage, high current supply. Whether or not they're ultrafi in this application I can not say.
-- Dave
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- Re: Anyone Ever Make their Own Filament Supply Inductors - Dave Cigna 13:25:02 01/31/07 (0)
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