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Amplifier has channel hum. Could it be a broken pot?

Discussion in 'Headphone Amps (full-size)' started by wind016, Aug 19, 2011.
  1. wind016
    Sorry if I'm doing this twice but I really need help. My Stax SRM323s has hum on the right channel at loud volumes while my left channel remains noise free. There is still a hum when the source is turned off. There is also still hum if I touch the ground terminal.
    What could be the problem? The pot?
  2. Uncle Erik Contributor
    Possibly. Though I'd suspect a bad electrolytic in the power supply on that channel. It could be letting some AC hum through.
  3. wind016

    I'm not sure how to know if it's damaged though...
    I can upload some images of it helps, but it might not. I'm not sure where to buy these parts too...
    I uploaded the pics here.
  4. Uncle Erik Contributor
    I don't see any bulging or obviously open caps. That doesn't mean they're all OK, though. You'd need to measure them to see if any are bad.

    Replacements can be found at Digikey or Mouser.

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