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9V Transformer is Buzzing - Need I Worry?

Discussion in 'Electrical Engineering' started by Billy, Oct 29, 2003.

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  1. Billy

    Billy Guest

    I have a 9VAC GE security system transformer that began to make a faint
    buzzing sound and I'm worried this may be unsafe. The noise started a week
    ago after several weeks of it *not* buzzing when first installed - or at
    least I never noticed it. The unit does *not* appear "hot".

    I changed the receptacle that it is plugged into and checked for grounding
    and it is properly grounded. I tested the voltage for 110v with a multimeter
    and it is steady at 110. I also swapped the transformer with a new one but
    it still buzzes. Finally, I ran the transformer to another two outlets and
    it buzzed on both, but each with different intensity.

    What could be the cause of this, and how do I fix it? Is this a warning that
    it should not be used or corrected?
     
  2. That'll dang sure do it. Another thought is to ring up my favorite
    surplus company (mpja.com) and get another for less than $10. Use 'ol
    buzzy for a paperweight.
     
  3. John

    John Guest

    Its called a hysteresis hum caused by loose laminations I would replace
    it cheap enough to do Not likely to happen but it could cause the
    insulation coating on the windings to deteriate causing a short
    circuit.And please don't correct my spelling
     
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