Re: Toroid question two

[Esondrmn-at-aol-dot-com (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

In a message dated 8/30/00 4:43:58 PM Pacific Daylight Time, tesla-at-pupman-dot-com 
writes:

<< 
 Experts,
 
 is there a specific formula that will tell you the optimum total topload C 
 you should have, other than the 1/4 tuning point? or is the only way to tell 
 by pilling on C until you get the best results?
 
 also same question, but for tube diameter (breakout voltage i mean).
 
 Dan
  >>

Dan,

I am not aware of any formulas to determine this.  On my 6.0" diameter coil, 
I started out with neon sign transformers, .01 uf tank cap and a toroid of 
14" in dia by 4" thick.  I now am using a 5kva distribution transformer, .05 
uf tank cap and two toroids, one 33" in dia and one 40" in diameter in a 
stacked configuration.  And, this coil could still use a larger toroid but I 
just haven't gotten around to making one.  You just need to experiment.  As 
input power goes up, the tank cap can get larger, primary frequency goes down 
and the toroid needs to get larger and larger.  You really want to get to the 
point where the toroid just breaks out at 80 to 90% of full power and emits 
only one or two streamers at a time - not breakout all around the toroid at 
the same time.

Ed Sonderman