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  1. 08-08-2011, 08:35 AM #14
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    tipsrfine
    tipsrfine is offline Professional Member*
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    Quote Originally Posted by NCHeat View Post
    Someone explain this to me. How can a cell phone charger plugged in with no phone connected to itbe drawing power? What is pulling amps on that circuit?
    I would imagine it has to do with the fact that the charger is converting ac to dc;perhaps energy loss from the energy being coverted into heat.
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  2. 08-08-2011, 09:00 AM #15
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    jmac00
    jmac00 is online now Professional Member*
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    I asked a "tech" guy once why a x-former hums.

    I was told that it could be out of Phase?

    you can get the technical info here

    http://www.allaboutcircuits.com/vol_2/chpt_9/4.html

    or you probably could just change it out and see if that quiet's it down
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