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RE: Formula for true self capacity of a coil.
Terry, All -
What are the tolorances, etc, of the "actual" measurements?
It is great that Tesla coil design and testing are finally getting close to
comparable results.
John C.
---------------------------
-----Original Message-----
From: Tesla List [mailto:tesla-at-pupman-dot-com]
Sent: Monday, May 29, 2000 4:20 PM
To: tesla-at-pupman-dot-com
Subject: RE: Formula for true self capacity of a coil.
Original Poster: Terry Fritz <twftesla-at-uswest-dot-net>
Hi John, All,
Let's not loose sight of the "actual" measurements!
1. 394.5 kHz
2. 269 kHz
3. 212.7 kHz
I ran these through E-Tesla5 and got:
1. 412.5
2. 286.1
3. 201.8
and Cmed got:
1. 401.43
2. 298
3. 230.41
and Jones/Cox got:
1. 397.07
2. 296.678
3. 208.78
and John C. got:
1. 403.6
2. 299.58
3. 231.38
"We" all came out high on the second one compared to the actual... Dare I
suggest that the second actual could be a little wrong! =:O
It would be a scarry day when we trust the calculations over the actual
measurements but... In my own testing I kept getting high numbers in one
test. I went back and check the "actual" dimensions and... oops! The darn
computer WAS right! ;-))
It "slightly" seems that Jones/Cox is getting the best answers... Of
course, slap dual toroids on these coils, and I'll vote for E-Tesla5 ;-)))
Hey! Does anyone remember the "good ol' days" when we had no clue what a
given secondary system frequency would turn out as ;-))
Cheers,
Terry
BTW - Great work Gavin in finding that true C formula!!
At 03:35 PM 5/29/00 -0700, you wrote:
>
>Gavin -
>
>You may be interested in how your calcs compare with the JHCTES Ver 3.1
>program.
>
>Coil Parameter Gavin JHCTES
>
># 1 L 17.87 17.87
> Cmed 8.8 8.9
> fr kHz 401.43 403.6
>
># 2 L 29.3 28.82
> Cmed 9.9 9.79
> fr kHz 298.00 299.58
>
># 3 L 42.25 42.67
> Cmed 11.19 11.09
> fr kHz 230.41 231.38
>
>Very good agreement considering different equations were used.
>
>John H. Couture
>
>----------------------
>
>-----Original Message-----
>From: Tesla List [mailto:tesla-at-pupman-dot-com]
>Sent: Monday, May 29, 2000 11:27 AM
>To: tesla-at-pupman-dot-com
>Subject: Formula for true self capacity of a coil.
>
>
>Original Poster: "Gavin Dingley" <gavin.dingley-at-astra.ukf-dot-net>
>
snip....