RE: FW: Updated JHCTES Ver 3.3

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

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



-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Thursday, June 21, 2001 6:50 AM
To: tesla-at-pupman-dot-com
Subject: Re: FW: Updated JHCTES Ver 3.3


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

Hi John,

Tesla list wrote:

> Original poster: "John H. Couture by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <couturejh-at-worldnet.att-dot-net>
>
> Bart -
>
> Your changing the primary capacitor Cp to change the primary turns is one
> way of changing the primary turns. However, the Cp is usually known
> accurately or can be easily measured so changing this variable is not
> necessary.

Yes of course. But it made sense to do this to get turns to relate
accurately.

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

I don't think I made myself clear on this very important procedure for
correlating the primary turns with the secondary terminal capacitance when
using the JHCTES program or any other program. The correct number of pri
turns is never known until the TC is built and tested. This is because the
sec term isotropic free space cap is reduced by an unknown amount when
placed on the sec coil. The ETesla6 program estimates this amount and
appears to come closer to the true value than any other method.

At the design stage the designer estimates the sec term cap by any of
several methods which is entered into the JHCTES program. This will get him
near the proper number of pri turns depending on his estimate. When the coil
is completed and tested he can find the actual operating frequency. He will
also have the actual pri turns. The only unknown he does not have is the
true sec term cap.

Going back to the JHCTES program he adjusts the sec term cap to obtain the
actual pri turns. This will then give him the true sec term cap. All of the
major parameters of the TC will then be accurately known by the designer.
This is the only way to find the true sec term cap except to do what the
program does and that is to do the same calcs manually. Of course most
coilers only tweet the finished coil and don't bother with the calcs. You
have to be dedicated to calcs in addition to sparks to bother with any TC
program.

John Couture

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