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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: Anyone Ever Make their Own Filament Supply Inductors posted by garryR on January 31, 2007 at 09:59:31:
Hammond makes a nice series of high-current chokes suitable for filament use. I use them with battery filament supplies in a DHT headphone amp. The idea is to block AC from passing through the battery, and also damp any high-frequency noise caused by the chemical reaction of the battery itself discharding. I suspect that even a low-value choke like 4mH can help here, as it is still quite effective in the higher frequencies. (The reactance of 4mH at 5Khz is 125R.) These low-value chokes can be had at very low DCRs.
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Follow Ups
- just buy the hammond stuff - nl 19:44:00 02/02/07 (0)
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