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1/4 Wave Theories - Trash Them!
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From: Sulaiman Abdullah [SMTP:sulabd-at-hotmail-dot-com]
Sent: Friday, May 29, 1998 1:49 PM
To: tesla-at-pupman-dot-com
Subject: Re: 1/4 Wave Theories - Trash Them!
Terry,
Firstly I'd like to thank you for all the 'scope photos,
VERY educational.
I'm a real beginner BUT if you truly beleive that 1/4 (or less)
wavelength is not important try running your research system
with a 6" sphere (or equivalent) as the secondary terminal with
appropriate re-tuning of the primary (tap).
I'd expect lots of discharges from half-way up the secondary!
You can never prove anything, but things can be dis-proved.
Regards ...... Sulaiman
>To: "'Tesla List'" <tesla-at-pupman-dot-com>
>Subject: 1/4 Wave Theories - Trash Them!
>Date: Thu, 28 May 1998 23:17:05 -0500
>From: Tesla List <tesla-at-pupman-dot-com>
>
>
>----------
>From: terryf-at-verinet-dot-com [SMTP:terryf-at-verinet-dot-com]
>Sent: Thursday, May 28, 1998 1:05 AM
>To: tesla-at-pupman-dot-com
>Subject: 1/4 Wave Theories - Trash Them!
>
>Hi All,
>
> I wrote another paper. What many have suspected, appears to be
true.
>Tesla Coils are not antennas. They are transformers.
>
>"An Analysis of Top and Bottom Currents in the Tesla Coil Secondary
Inductor."
>
>It can be found as a web page and WORD97 zip at:
>
>http://www.peakpeak-dot-com/~terryf/tesla/experiments/experiments.html
>
> This paper describes measurements of the top and bottom currents in a
Tesla
>coil secondary inductor. These measurements indicate that the
secondary is
>acting as a simple lumped inductor. There appears to be no 1/4 wave
effect.
>The currents are in phase. It appears that the 1/4 wave theory of
Tesla
>coil operation is incorrect. Also, the top terminal appears to be
acting as
>a simple capacitor in parallel with the coil's self capacitance. A
model
>for this behavior is presented.
>
> You can take all those 1/4 wave models and all those books with
>pretty sine wave current distributions and throw them away (Well....
save
>Tesla's)! The basic Tesla coil is a simple lumped parameter
transformer
>with loose coupling. Very good news for spice modelers!
>
>Still need to do some theorizing about the self capacitance........
>
>
>
>Now.... comes the sparks!! :-))
>
>
> Terry Fritz
>
>terryf-at-verinet-dot-com
> or
>terryf-at-peakpeak-dot-com
>
>
>
>
>