Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Slight hum in Dahlquist LP1 elctronic crossover posted by johng@clarkretirement.org on December 29, 2006 at 07:43:16:
If you don't sell it to Jeffrey,I assume you don't have test instruments. Try replacing the diodes. If you ahve a slight hum in a well-designed power supply, it could be that one of the diodes has opened and you're actually running off a half-wave power supply. Diodes are cheap and easy to replace. The other easy possibility is a filter cap that's failing. They, too, are cheap and pretty easy to replace for a low voltage, low power unit like this. The next possibility is a voltage regulator. Those go out sometimes.
If you replace all these items with stock items, you're looking at $10-20. If you upgrade to HEXFRED diodes and maybe some well-regarded caps, double that. It's still not much, and is probably within your skills.
Good luck!
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Follow Ups
- Suggestions - lipmanl 09:00:51 12/29/06 (2)
- Re: Suggestions - johng@clarkretirement.org 11:18:06 12/29/06 (1)
- Re: Suggestions - lipmanl 11:35:54 12/29/06 (0)