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 08:17 AM 5/16/2003 -0600, you wrote:
>Original poster: "Mike by way of Terry Fritz <teslalist-at-qwest-dot-net>" 
><megavolts61-at-yahoo-dot-com>
>
>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.
><snip>
>
>Would this not detune your coil thereby losing the
>resonance(or maybe this would improve quenching)?
>Tesla studied the effect of charging a cap of two to
>four times the tank cap's size and letting the spark
>gap switch the energy into the tank circuit.  I don't
>know what effect that has on the output, because the
>tank circuit would never be quenched, but since he was
>trying to develop a transmitter, this might lower the
>output to suppress the arcs and have a longer ringdown
>time for the output waveform - making it more like a
>continuous wave output.
>Mike


But what about putting current into a resonant circuit tuned to one 
frequency, using low power, and resonant rise, to get the circulating power 
to a high level, then changing the resonant frequency to match that of a 
coupled load, dumping the circulating power.

Think of a flywheel driven punch press... spin the flywheel up over some 
fairly long time, then engage the clutch...

I don't claim that it's practical, just that it's a possible mechanism to 
"charge slow, discharge fast"