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Re: [TCML] Toroid Capacitance

Hi Nicholas,
Javatc should never be that far off. The ground plane, the surroundings, and actual heights above ground are just as important as the basic coil data. Likely there is input error somewhere. Ensure the turns are real also. An easy method of that is to measure the secondary inductance and compare to the stated output for Ldc. 

Take care,
Bart

On 9/16/2011 7:15 AM, Nicholas Hall wrote:

Hello All -

I recently have been tuning my coil and found it interesting that my
numbers were quite a bit off of that of JavaTC.  Essentially I found
the resonant freq of my secondary with a signal generator and a scope.
  My tests shown I resonate at 274khz; JavaTC has me down at 240khz.
I'm trying to figure out what JavaTC is not accounting for with my
setup.

Does density of a toroid affect capacitance or is it strictly
dimensions?  Also wondering if I measure topload capacitance with a
simple capacitance setting on a Fluke multimeter?  I've been thinking
of purchasing one.

Thanks

Nicholas Hall
262.706.1337
ngharo@xxxxxxxxx
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