Re: Parametric pumping for tesla coils?

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

Original poster: "Jim Lux by way of Terry Fritz <teslalist-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

At 03:25 PM 5/15/2003 -0600, you wrote:
>Original poster: "Jolyon Vater Cox by way of Terry Fritz 
><teslalist-at-qwest-dot-net>" <jolyon-at-vatercox.freeserve.co.uk>
>
>Dear List,
>If I may be so bold, I have been thinking that instead of using switching 
>devices to vary currents and voltages as we presently do, how about 
>changing say, the capacitance instead -charging at low voltage and 
>discharging at high
>since charge ,Q,  on an isolated capacitor doesn't change with a change in 
>capacitance but stored energy and voltage do vary with changes in the 
>capacitance.

It is the idea of charging a capacitor at low voltage, then separating the 
plates to reduce C, increasing the voltage (keeping Q, charge, constant) 
that many electrostatic machines are based on (i.e. Wimshurst, etc.)

I'm sure that Antonio can shed a huge amount of light on this...