Re: Coil Pictures :-)

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

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>

Hi Winston,

Tesla list wrote:

>Original poster: "Malcolm Watts by way of Terry Fritz 
><twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>
> >     The system was my old 6" cobble up, running a 0.1 uF cap, 46 uH
> > primary, and a 60 mH 1300 turn secondary with 20 pF of top capacitance.
> > The Fres was about 110 kHz.  It was running at 1800VA from two seriesed
> > H&R xfmrs (2700V -at- 330 mA).  John's formula predicts a 9 foot spark
> > here, so my five footers aren't very impressive.
>
>Does it?  I get 6' from the formula I remember which sounds about
>right at that power level.

Yep, concur with Malcolm. 1800VA is about 6 feet (1.7 * sqrt(1800)).
So the system was doing well.
Bart