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What is it? (component)

Discussion in 'Electronic Basics' started by Ivan Vegvary, Nov 11, 2012.

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  1. Ivan Vegvary

    Ivan Vegvary Guest

    Size and shape is identical to a 1/4 watt carbon axial lead resistor.

    Body is glass-like and has a red band on each end.

    Markings are: 104M - - 50V - - WC - - 8421

    Analog ohm meter reads infinity but slowly drops to about 5 meg in about 10 seconds time. Readings in both directions are identical.

    Thanks for the help,
    Ivan Vegvary
     
  2. Phil Allison

    Phil Allison Guest

    "Ivan Vegvary"

    ** Class encapsulated, ceramic capacitor.

    100nF, 20% tolerance 50V rating - made in the 21st week of 1984.

    Likely manufactured by Unitrode.

    Old Peavey guitar amps were full of them - easily mistaken for zener
    diodes.



    ..... Phil
     
  3. Yes, the giveaway was the "104".

    Michael
     
  4. Phil Allison

    Phil Allison Guest

    "Michael Black"

    ** Must be one of them rocket scientist types ....





    ..... Phil
     
  5. Somebody's fingers are holding the test leads against the capacitor leads
    and increased pressure causes the reading to drop?

    Michael
     
  6. amdx

    amdx Guest

    Cause the cap was charged in one direction, then the leads were swapped
    and the meter reads infinity until until the charge polarity changes and
    then it measures leakage resistance.
    Until someone tells me better.
    Mikek
     
  7. Except, it's a .1uF capacitor, not really going to hold a charge

    Michael
     
  8. Guest

    Compared to the input resistance of the meter? What's going to
    discharge it?
     
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