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Cable Asylum Interconnects, speaker wire, power cords. Ask the Cable Guys. |
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Cable Asylum Interconnects, speaker wire, power cords. Ask the Cable Guys. |
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In Reply to: Wall Wart questions posted by SCBailey on November 16, 2006 at 07:06:46:
They are usually made with just enough capacity to get by, which is not enough for most audio applications. The linear ones have too little transformer core and will generate noise from core saturation with higher line voltage. The rectifier diodes will generate noise as well (this is true of any linear supply using p-n junction rectifier diodes). The mechanical arrangement of having something heavy dangling from the outlet invites vibration problems.There are also switching wall-wart supplies, and these are horrid sources of RF noise.
As bartc said, it is easy to make your own superior supply. You can buy a laboratory regulated supply for the same output voltage, but this will still need some sort of filtering at its AC input to keep its noise out of your AC.
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Follow Ups
- The trouble with wall-wart supplies... - Al Sekela 13:51:53 11/16/06 (4)
- Re: The trouble with wall-wart supplies... - SCBailey 14:11:05 11/16/06 (3)
- I'm talking about lab bench supplies. - Al Sekela 21:15:53 11/16/06 (0)
- here's one example of an easy and effective replacement - troporobo 17:30:24 11/16/06 (1)
- Yes, this site gives several good designs - bartc 17:41:44 11/16/06 (0)
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