RE: Input power measurement

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

Original poster: "Stephen Conner by way of Terry Fritz <teslalist-at-qwest-dot-net>" <steve-at-scopeboy-dot-com>

At 19:11 09/03/03 -0700, you wrote:
>Original poster: "John H. Couture by way of Terry Fritz 
><teslalist-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>
>
>
>All -
>
>It should be noted that on Richie's web site below the example for the
>loading at resonance charging is Watts = V x I = 200,000 x 2 = 400,000 watts
>or
>400 KW.

The theory of resonant charging is more complex than it appears. A resonant 
circuit could ring up to very high voltages/currents/reactive powers but in 
practice the spark gap fires every half cycle and 'resets' it so it never 
has a chance to ring up.

I used resonant charging for my first coil with a 10/25 NST. I used spice 
simulations and calculated  that the tank cap would charge to 20kV peak and 
the real power throughput would be about 200W. With LTR it was 14kV and 
about 210W. Of course if the spark gap fails to fire reliably every 
half-cycle (like mine did) then it's a different story and your NST will 
soon blow up (like mine did again) I now run DC resonant charging which is 
much more predictable.

Steve C.