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Audio Hum and Noise?

RNST Feb 7, 2016

  1. RNST

    RNST Entrusted Devil Super Moderator

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    It took a while to find who the culprits are in the system.

    The pre amp manufacturer says on their site that proper grounds are required for best performance. They have a grounding lug for attachment to the turntable. Problem is the turntable doesn't have a ground post. Grounding it to the headphone amp works well.

    I noticed there was still hum depending where it was case grounded. Also the gain switch amplified the hum.

    So good grounds and nominal gain works well.

    I determined this when removing dust balls under the amp one day. Still holds true cleanliness is next to . . .
     
  2. waterdogs

    waterdogs Brigade Member Brigade Member

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    4/14/18
    Just a little update as I was reviewing this thread.
    A lot of my equipment is of the vintage variety, from the days before everything had polarized plugs. Had a hum in one of my turntables that was a pain in the ass to track down, when I found the solution was as simple as just pulling the plug from the wall, flipping it over 180 degrees, and plugging it back in. Some days, ya just get lucky....
     

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