On Sun, 20 Feb 2011 10:00:12 -0500, Jamie
t wrote:

John - KD5YI wrote:
On 2/19/2011 6:33 PM, Jim Thompson wrote:

Anyone have good guess for the capacitance of a 1" diameter piezo
disk?

Likewise, how much capacitance in around 100' of typical telephone
twisted pair?

...Jim Thompson


I just measured the only piezo disk I have, a .75 inch one. It measures
20 nF.

Cheers,
John
I would be willing to bet if you were to use several different model
instruments to measure that, you won't get inconsistent readings.. I
would think the applied energy from the instrument would cause a
piezoelectric (mechanical change) effect there by giving you different
readings from one to another..

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Then you _would_ get inconsistent readings.

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JF