Re: determining capacitance of a topload?

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

Original poster: "Malcolm Watts" <m.j.watts-at-massey.ac.nz> 

On 4 Apr 2004, at 13:06, Tesla list wrote:

 > Original poster: "Eastern Voltage Research Corporation"
 > <dhmccauley-at-easternvoltageresearch-dot-com>
 >
 > Very easy.  First measure the resonant frequency of a secondary coil.
 > Then put the top load on it.  Re-measure the resonant frequency.
 >
 > You will now be able to calculate the top load capacitance.  Its a
 > rough measurement, but should be good enough for your purposes.
 >
 > Dan

It doesn't quite work because the second frequency is determined by
the aggregate capacitance of the secondary and topload - they shield
each other to some extent and the total capacitance is lower than the
sum of the individual capacitances.

Malcolm
<snip>