piclist 2001\04\27\020409a >
Thread: Pin impedance SOLVED
face BY : David VanHorn email (remove spam text)

At 03:31 PM 4/27/01 +1000, David Duffy wrote:
>At 11:57 PM 26/04/01 -0500, you wrote:
>>Turns out, it was a 0.1uF leaded monolithic cap, that had developed an
>>internal "short" of 11.2k.
>>I've seen them fail shorted (near zero R) before, and open, but never 10k!
>>It's a more complicated failure though, as I wasn't able to pull it up to
>>5V, even with a 1k resistor.
>>47 ohms got it there though.  Sort of like a bad zener, and definitely not
>>what you expect from a capacitor!
>>FWIW, there's the culprit.
>I always use MKT's for audio and timing applications. The mono's seem
>to curl up and die when used for other than PSU de-coupling purposes.
>Maybe it shouldn't be so, but repair experience has shown it to be true.

All this one had to do was get charged and discharged through 10k and
10-150k resistors to 5V.
Hardly a stressful app..

Dave's Engineering Page: http://www.dvanhorn.org
Where's dave? http://www.findu.com/cgi-bin/find.cgi?kc6ete-9

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