Re: measuring secondary parasitic capacitance?

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

Original poster: "Barton B. Anderson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>

Hi Larry,

In step with actual measurement, "you" would be the best one to estimate 
the capacitance because you know your secondary specs and misc. data. I 
encourage you to give FANTC a try.

http://www.classictesla-dot-com/fantc/fantc.html

In case you or anyone else is assuming FANTC is just another java 
calculator, here are a few comments I hope encourages you and others:

Greg Leyh wrote:
"I tried out the stats for the final design set on Electrum. The FANTC 
program seems to have hit it spot on... certainly well within the error 
bars of my actual measurements"

Bert Hickman wrote:
"This is one accurate and very POWERFUL program - congratulations Bart and 
Paul!"

Terry Fritz wrote:
"This is WONDERFUL!!!"

We did have issues to fix at the time besides positive comments, but mostly 
browser issues (many we just don't have control over). Patience is needed 
while FANTC does it's thing, but the wait is well worth the accuracy 
attained. So again, I encourage you (and everyone) to use FANTC. It's a 
brand new TC tool, and one that has been needed for a long, long, long 
time. It's in an on-line format so that all have access to it regardless of 
platform. Because of this, it's not compiled and slower than one may wish, 
but that's the price we pay to make it available to "everyone". Your 
question on estimation is just one of many areas where FANTC can help. 
Although I am obviously trying to get the word out about FANTC, I also 
believe it's the program which will provide the best estimate.

Take care,
Bart

Tesla list wrote:

>Original poster: "Laurence Davis by way of Terry Fritz 
><twftesla-at-qwest-dot-net>" <meknar-at-hotmail-dot-com>
>
>just out of curiosity i tried to measure the capacitance of a secondary.
>my meter kept giving the out of range error, then at one point started
>to give a reading. it wasnt stable.  the lowest I read was .150 nf.
>I didn't do the tesla calc thing on the secondary, but I would expect
>two things.
>
>should be .015nf (or 15pf) or rounds 'bout there.
>
>parasitic capacitance has to be measured with higher
>voltage. perhaps the lower voltage requires more sensitivity
>to measure the capacitance than that of higher voltage.
>or design a piece of test equipment to measure it.
>just curious to see accurate the estimations are.
>
>larry.
>
>