mechanical phone ringer

Discussion in 'General Electronics Chat' started by electronis whiz, Aug 4, 2010.

  1. electronis whiz

    Thread Starter Well-Known Member

    Jul 29, 2010
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    i have a few old mechanical phone ringers one has a .4 mf 500 v DC paper capacitor bolted to it is this suposed do something for the ringer like a capacitor does for a flash in a camera. or is it for something else.
     
  2. beenthere

    Retired Moderator

    Apr 20, 2004
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  3. electronis whiz

    Thread Starter Well-Known Member

    Jul 29, 2010
    519
    27
    so this capacitor would go in series with the ringer. am i understanding this corectly. this capacitor is rated 500 vdc how can it run ac too. i thought they capacitors blew up when there polarity is reversed or used on ac.
     
  4. beenthere

    Retired Moderator

    Apr 20, 2004
    15,815
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    It would if it were electrolytic. Sounds like yours is wax and paper. That is a non polar type - not sensitive to the polarity of applied voltage.
     
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