RE: JHCTES Programs was (15" coil project)

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

Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <couturejh-at-telocity-dot-com>


Malcolm -
I was sorry to hear that you are not an advocate of TC programs because I
have used some of your test data to make my programs possible.

I would agree that some TC programs are sophisticated calculator programs.
The JHCTES Ver 3.1 and many other TC programs are of this type. They use
standard equations and produce a number of outputs saving the coiler a lot
of work. There is now another type of TC program that is available, one that
not only uses the standard equations but also empirical equations based on
test data from real world coils.

An empirical equation for Tesla coils requires the building and testing of
many coils and the processing of this data to modify the theoretical
equations. This is what has been done with the JHCTES Ver 3.3 program and
why I have requested coilers to send me their test data. I am indebted to
many coilers who have been kind enough to send me their data and make my
programs possible. The Ver 3.3 is under continuous change to make it conform
with the latest data available. The results to date have been encouraging.

It is interesting to note that the Ver 3.1 can be a sort of empirical
program because the sec term capacitance input can be changed to agree with
the actual test capacitance by adjusting the pf so the actual operating
frequency shows in the outputs. You might call this instant empirical
processing. I think that Terry's ETesla6 program is based only on
theorectical equations but he may have modified the program because it
apparently gives very good results for the sec term.

Malcolm, thanks for demolishing the old wirelength idea to which I think you
are referring. That also helped my programs. I would also be interested in
your Toroid program.

John Couture

-----------------------

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Monday, October 22, 2001 6:07 PM
To: tesla-at-pupman-dot-com
Subject: Re: 15" coil project


Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<m.j.watts-at-massey.ac.nz>

Hi Greg,
         I cannot say that I am a great believer in computer programs
since they appear to be, for the most part, a more complex form of
calculator which adds little in the way of "design" (my sincere
apologies to those who consider their programs to be more than this).
I have written a few small utilities for calculating Cself etc. and
used a spreadsheet to demolish an old wirelength idea that was once
popular but beyond that do not expect to be writing anything else.
      Below I suggested a range of qualities desirable in a coil
which meets my personal coiling aims. To a degree it reads like a
simultaneous equation. I previously suggested specifying output
voltage and terminal energy which, together with a primary power
figure, gives the starting point for such a design.
      Personally, I get more enjoyment from developing an idea than
cranking out a rote design from a program.

Regards,
Malcolm