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