Re: GM HEI (further measurements)

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

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

At 11:19 AM 1/19/2002 -0200, you wrote:
  The top load or terminal attached to the high-voltage button affects
>> the resonant frequency a lot too even though the HV-winding does seem to
>> have a large natural capacitance associated with it.
>
>Would this be really true? Remember that a in a Tesla coil secondary,
>the self-capacitance of the coil is a function practically only of the
>dimensions of the coil (one half of the body capacitance of a metal
>cylinder with the shape of the coil). In an induction coil there are
>the core and a metal case, that contribute with some extra capacitance 
>to the windings, but these are not so big. An inductance of 10 H 
>resonating at 10 kHz is seing only 25 pF of capacitance. It would be
>interesting to see measurements of these capacitances, with and
>without the core and the case.
>
>Antonio Carlos M. de Queiroz
>
>

I think the turn to turn capacitance is far higher in these coils.

http://hot-streamer-dot-com/TeslaCoils/Misc/GMHEI/GMHEI.jpg

Not a Medhurst distributed capacitance, but lots of wires wrapped together
in a small place.

Cheers,

	Terry