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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: Cleaning up boost/buck heater drivers posted by Chip647 on September 12, 2024 at 12:05:44:
LC filtering can help, but frequencies that high usually migrate around the chassis. This type of noise can also conduct back into the AC line and into other areas from there. Don't know if it will help, but my SETs use a square wave switcher that heats the DHT filaments with an 80kHz square wave. I don't hear any odd effects, and distortion measurements don't indicate anything untoward happening in the audio band. I think a small amount of residual noise from a buck/boost isn't likely to create any issues.
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Follow Ups
- RE: Cleaning up boost/buck heater drivers - Triode_Kingdom 15:23:55 09/12/24 (3)
- RE: Cleaning up boost/buck heater drivers - Chip647 16:26:32 09/12/24 (2)
- RE: Cleaning up boost/buck heater drivers - Triode_Kingdom 18:57:39 09/12/24 (1)
- Yeah. Mv. Thanks. I will keep working it. (nt) - Chip647 07:38:20 09/13/24 (0)
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