RE: Calculating E-Field of SSTC or Tesla Coil

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

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

Hi John,

If the room is 300 inches high and the coil is 200 inches high...  C top 
will increase just as good ol' E-Tesla predicts ;-))  It's that C is 
proportional to 1/d thing...

What is this "No surroundings effect" stuff!!!   With the ceiling only 1/2 
of the secondary height away, "surrounding effects" will be dramatic!!!!

I am concerned the E-Tesla and TSSP seem to disagree since TSSP uses much 
of the same theory as E-Tesla.  It is possible the E-Tesla was confused by 
such a close ceiling but it should have reported the usual warnings.  I 
would need the full "output.txt" file to really know what is going 
on...  E-Tesla is very good at "tight places" stuff...

Can you tell me the actual input data to E-Tesla and I can easily check it 
all out.  E-Tesla creates a diagnostic file that can easily plot all the 
fields and where it is "thinking"...  Bobo's are pretty apparent then...

Cheers,

         Terry




At 09:34 PM 7/25/2003 -0400, you wrote:

>Terry -
>
>There appears to be a problem with E-Tesla6. The program is showing an
>incorrect Fres when compared to TSSP and JHCTES. This is due to the Cpf
>being too large.
>
>Bare secondary coil is isolated in center of room
>Ceiling and walls 300"
>Pri and sec windings at 200"
>No surroundings effect
>
>                     TSSP     JHCTES       E-Tesla6
>
>Fres KHz  about     150      149.71        139.91
>
>C pf                ---       13.30         16.38
>
>Sec Ind mh          ---       84.97         84.97
>
>When the capacitance effects of the surroundings are taken into
>consideration (ceiling and walls = 100) the C pf should decrease and the
>Fres should increase???
>
>John Couture
>
>--------------------------------
>
>
>-----Original Message-----
>From: Tesla list [mailto:tesla-at-pupman-dot-com]
>Sent: Friday, July 25, 2003 3:57 PM
>To: tesla-at-pupman-dot-com
>Subject: Re: Calculating E-Field of SSTC or Tesla Coil
>
>
>Original poster: "Terry Fritz" <teslalist-at-qwest-dot-net>
>
>Hi Dan,
>
>E-Tesla6 can calculate x/y arrays of numbers that can be imported into
>Excel or MathCad.  See the readme file and the other site:
>
>http://hot-streamer-dot-com/TeslaCoils/Programs/E-Tesla6.zip
>
>http://hot-streamer-dot-com/andrewb/models/models.htm
>
>The program is really to find Fo, but we have had great fun with the data
>that can be plotted from the array work files.
>
>Cheers,
>
>          Terry
>
>
>
>At 03:25 PM 7/25/2003 -0400, you wrote:
>
> >Anyone have any information on how to calculate the E-field
> >(approximately) of a tesla coil.
> >I saw an old post that stated Terry had an E-Field calculator program,
> >but i didn't see one on the
> >hot-streamer site.
> >
> >Any help appreciated.
> >Thanks
> >
> >Dan