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Mains hum + RF interference

Discussion in 'Electrical Engineering' started by Den Murray, Feb 25, 2004.

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  1. Den Murray

    Den Murray Guest

    Hi Group

    I'm looking for a simple solution to an annoying problem.

    On my PC I've got a set of external (mains powered) speakers. I've got a
    couple of annoying problems that I'm sure should be rectifiable, but I don't
    know how!

    1. When the speakers are turned up high I hear a mains (60Hz) hum.
    2. I sometimes get really heavy interference from what sounds like local
    walkie-talkie / taxi service / emergency service (mainly noticable when the
    speakers are (i.e. powered up) but have no audio output going to them.

    Any ideas how to stop this?

    Cheers

    D
     
  2. Vlad

    Vlad Guest

    It looks to me you have a ground problem.
    In order to detect a modulated carrier you must have a detector (a non
    linear connection) A bad ground.
    Have all grounds together and grounded only at one location.

    Vlad
     
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