RE: Mutual Inductance & K Factor

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

Original poster: "John H. Couture by way of Terry Fritz <twftesla-at-qwest-dot-net>" <couturejh-at-mgte-dot-com>


Terry -

Thank you for bringing this report to my attention. There certainly is
plenty of information to keep any coiler busy for years. I fully agree this
is a massive source of calculation data for Tesla coilers and Paul N. is to
be congratulated. And I thought that Beowulf was a weird story you had to
read for high school english.

However, it should be noted that this data is for TC secondaries and toroids
isolated in space. The influence of surrounding objects is not included. In
fact as I have said before this influence is an indeterminate unknown and
it's effects can only be found by testing the Tesla coil. This influence can
also be estimated before the coil is built by using the ETesla program.

John Couture

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-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Thursday, March 21, 2002 9:16 PM
To: tesla-at-pupman-dot-com
Subject: RE: Mutual Inductance & K Factor


Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi John,

Be sure to check this out:

http://www.abelian.demon.co.uk/tssp/vsd/

Paul ran 13500+ secondary/toroid configurations on some giant computer
thing and collected all the results in big data files.  It is probably more
accurate and "clean" than any other data available.  There is enough
information there to keep one occupied for years!!  I think this data could
easily supply the topload reduction data you seek.  A little work on it
with Excel should provide all the answers.

Be sure to check out the other wonderful things too at:

http://www.abelian.demon.co.uk/tssp/

We will be pondering all this data for decades!!

Cheers,

	Terry


At 11:46 PM 3/21/2002 -0800, you wrote:
>
>Malcolm -
>
>Do you know of any computer programs that finds the toroid capacitance when
>placed on the TC secondary at the design stage  other than Terry's ETesla6
>program? Even Terry's program requires inputs that can be only guestimates.
>Here again it is impossible to come to any conclusion about a TC program
>because there is not enough test data available to verify what the program
>is producing.
>
>However, after the TC is built the actual toroid capacitance can be found
by
>tests and with the JHCTES or similar program. The unknowns are still
>unknowns but their effects on the Tc operating frequency become known. This
>frequency is then used with the program to find the true toroid
capacitance.
>It should be noted that this can only be done with programs that are the
>automatic tuning type because several parameters are involved that must be
>coordinated.
>
>The 15 to 25% reduction is based on my limited tests. I agree that this
>reduction could be much greater when the top load conditions varied from
>those that existed when I made the tests.
>
>John Couture
>
>-----------------------------