Re: Tesla Coil toroid Size

• To: tesla-at-pupman-dot-com
• Subject: Re: Tesla Coil toroid Size
• From: RWB355-at-aol-dot-com (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Sat, 05 Sep 1998 07:16:26 -0600
• Approved: terryf-at-verinet-dot-com

 Original Poster: "John H. Couture" <couturejh-at-worldnet.att-dot-net> 
SNIP
   These equations indicate the output voltage (Vs) or spark length would
 decrease, not increase, if the Cs (toroid capacitance) was increased.
    Any comments regarding this apparent contradiction with theory? How would
 you or do you determine the optimum toroid size for a particular TC design?
 It is obvious that changing the toroid size affects the spark length as
 proven by tests.
 
Hi John,

 Here are my 2 (s)cents worth.
 I would suppose increased spark length is not only dependent on the output
voltage but also largerly depends on the output current, which DOES increase
when you increase the total capacitance.
There has also been a lot of controversion about  (Ctotal = Csec+Ctopload).
You canīt really just add Ctopload to Csec to get the total capacitance. I
have seen equations where only 75 % of Csec+Ctopload are used as the total
capacitance.

Brent Turner drew a nice diagram which clearly shows that the equation 
Ctotal=Csec+Ctopload does not really hold true. For a look at the average
frequency 
it comes close enough however.

I posted it on my webpage:
www.geocities-dot-com/CapeCanaveral/Launchpad/4902/sec.gif

Sorry, this is the only file on my webpage at the time because I simply donīt
get around to shaping it up

coiler greets from germany,
Reinhard

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