Re: measuring secondary parasitic capacitance?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz <twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>

Tesla list wrote:
 >
 > Original poster: "Laurence Davis by way of Terry Fritz 
<twftesla-at-qwest-dot-net>" <meknar-at-hotmail-dot-com>
 >
 > tried with a series connected 10m carbon film resistor.
 > meter consistently read 88pf +- 1.
 > sec spec: 4.5" coil form, 20" winding length, 30awg heavy build.
 > IIRC 1200 or so turns, around 1350ft.
 > meter is a radio shack dmm, model 22.174 rev b.

The resistor is not necessary. Just leave the connection open. This
measures the body capacitance of the coil, that is ~twice the
self capacitance. Keep the coil far from the ground and other
objects for a precise measurement.

Antonio Carlos M. de Queiroz