What is it? (component)

Nov 11, 2012 5 Replies

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


"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

Yes, the giveaway was the "104".

Michael

"Michael Black"

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

.... Phil

Like Phil said, its a 100nF cap.

What I want to know, though, is why the meter starts at infinity then drops to 5 megohm -- I would think it'd stay at infinity.

Tim Wescott Control system and signal processing consulting www.wescottdesign.com

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

Michael

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