# Re: Toroid Capacitance vs. Frequency

• To: tesla-at-pupman-dot-com
• Subject: Re: Toroid Capacitance vs. Frequency
• From: Terry Fritz <twftesla-at-uswest-dot-net>
• Date: Thu, 01 Jul 1999 22:27:50 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

```Hi Yuri,

I have a computer program that will calculate the resonant frequency given
the dimensions of your coil.  It is at:

www.peakpeak-dot-com/~terryf/tesla/misc/e-tesla3.zip

You can see how different top terminals affect the frequency.  There is a
text file that tells how the program works.  In general, the larger the
terminal the lower the frequency.  I am not a fan of the 1/4 wavelength
theory and there are some papers below you may be interested in.

www.peakpeak-dot-com/~terryf/tesla/experiments/modact/modact.html
www.peakpeak-dot-com/~terryf/tesla/experiments/topsync/topsync.html

There are also some great formulas and general info about coil design at:

Cheers,

Terry

At 05:27 PM 7/1/99 -0700, you wrote:
>I have heard that a wide variety of sizes, shapes, and capacitances of
>discharges terminals can be used on any given secondary coil. What I would
>like to know is, how does the capacitance or size of the discharge terminal
>effect the resonant frequency of a secondary? I ask this because I'm having
>a bit of a problem with my resonant frequency. Can I alter this value by
>using a bigger or smaller discharge terminal? My exact situation is that I
>have a quarter wavelength resonant frequency of 165.24 kHz. I would like to
>alter this to get it as much higher as possible. Thanks for any help.
>
>-Yuri Markov
>
>
>_______________________________________________________________
>Get Free Email and Do More On The Web. Visit http://www.msn-dot-com
>

```