RE: Coil Woes

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

Original poster: "Lau, Gary" <gary.lau-at-hp-dot-com> 

My cap size selection was determined by an experiment I performed with
different sizes between .01 and .05uF, in .01uF increments.  For each
size I determined the relative power delivered to the primary.  See
http://www.pupman-dot-com/listarchives/2004/April/msg01087.html for complete
details.  The bottom line was that with my particular NST, operating at
140VAC in, the most power (C*V*V) was delivered using a .04uF cap.

Regards, Gary Lau
MA, USA

Original poster: "Gerry Reynolds" <gerryreynolds-at-earthlink-dot-net>

Hi Gary,

Have you tried 2.8 * Cres with your 7x30 toroid?  I would think that
with 4
* Cres, you would not be able to charge to full output voltage.  You
might
get greater bang energy with a smaller cap.   With my 15/60 setup, I get
the
caps charged to 24KV with 2.5 * Cres.

Gerry R.

  > Original poster: "Lau, Gary" <gary.lau-at-hp-dot-com>
  >
  > I know that I recently swapped my 7x30 toroid for a 6x24 toroid.  The
  > bigger toroid would only breakout reliably from a breakout point and
  > delivered my longest streamers.  The smaller toroid didn't need a
point
  > and readily broke out all over the toroid with shorter streamers,
  > probably similar to what you were saying.  This was with my 15/60,
sync
  > RSG, and a Cres*4.0 cap in both cases.
  >
  > Gary Lau
  > MA, USA
  >