Capacitor Conundrum

Discussion in 'General Electronics Chat' started by richbrune, Feb 3, 2006.

  1. richbrune

    Thread Starter Senior Member

    Oct 28, 2005
    106
    0
    I recently purchased two large capactors. After desiging a circuit and a case that they would go in. I realized that the markings on the capacitor were wrong. I'd like to know if there's some kind of test that will tell for sure what the polartiy is, so I don't need to get a new hair-doo.

    Attached is a photo of the capacitor. I think it's an electrolytic.

    Thanks again,
    Rich
     
  2. pebe

    AAC Fanatic!

    Oct 11, 2004
    628
    3
    Can't see the photo. What is the capacity and voltage rating?
     
  3. richbrune

    Thread Starter Senior Member

    Oct 28, 2005
    106
    0
    I'll try again, but its a 70 volt, 3,600 MFD wit about a 2" diameter case and about 6" long.
     
  4. pebe

    AAC Fanatic!

    Oct 11, 2004
    628
    3
    You could try putting approx 10 volts on it via a 100 Ω resistor and measure the leakage current. Then discharge it and reverse the polarityand test again. You will probably find a difference in leakage current - correct polarity gives lowest current.
     
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