Re: Toroid Capacitance

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

Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>

Hi John,

The capacitances of toroids, coils, and their combination is well known and 
understood.

If one takes say a 20pF (free space) toroid and adds it to a coil with a 
Medhurst capacitance of say 15pF, The combination will (in fact must) have 
significantly less capacitance.  Maybe like 27pF.

All these can be calculated with E-Tesla6:

http://hot-streamer-dot-com/TeslaCoils/Programs/Programs.htm

Cheers,

         Terry

At 05:52 PM 7/19/2003 -0400, you wrote:

>All -
>
>Have any coilers found that the Toroid free space capacitance is reduced
>when the toroid is placed on the secondary coil?
>
>John Couture
>
>-----------------------------------