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Fwd: Re: Questions about oscillating frequency



>X-Envelope-From: stretchmonster-at-juno-dot-com  Sat Apr 17 22:00:12 1999
>To: tesla-at-pupman-dot-com
>Cc: tesla-at-pupman-dot-com
>Date: Sat, 17 Apr 1999 18:19:03 -0500
>Subject: Re: Questions about  oscillating frequency
>X-Mailer: Juno 2.0.11
>From: Brent L Caldwell <stretchmonster-at-juno-dot-com>
>
>Original Poster: Brent Caldwell  < StretchMonster -at- juno-dot-com>
>
>
>A question for all:
>
>	Among the copius literature I have read about tesla coils, I have read
>that the secondary coil is supposed to oscillate at 4 times the frequency
>of the primary.  I have also seen that the secondary is supposed to
>oscillate at 1/4 the frequency of the primary.  Furthermore, I have heard
>many people say they have disproven  both theories mentioned above.  
>
>My questions are the following: 
>
>1.)  At what relative frequency does the secondary oscillate?  

The primary and secondary should be at the SAME frequency.  Books often
talk of "1/4 wavelength" but they do not mean 1/4 the frequency.  If you
look at an AC sine wave, the first highest voltage point occurs at 1/4 of
the full wave distance and that is where they get all the 1/4 wavelength
stuff.  It is really totally independant of frequency.  I could say a lot
more but ... :-)

>
>2.)  If they do oscillate at the same fequency, then why is it not good
>to have a tight       magnetic coupling between the primary and secondary
>coils?

If the coupling were tight, the tesla coil would act as a transformer.  The
output voltage would simply be a function of the turns ratio.  However,
with loose coupling, the voltage is a function of input energy and the
square root of the ratio of the component values which can be much greater
with far less effort.  One can, and a few of use have, spent years studying
such things so I can't give a quick closed answer since this subject can
get very deep very fast but that is the basic idea...

I have a paper that showes actual and predicted voltages and current in a
real TC at:

www.peakpeak-dot-com/~terryf/tesla/experiments/experiments.html

	Terry


>
>Anyone with any information regarding either of these is welcome to
>resopond.  I am also particularly interested in actual measurements taken
>of the oscillating frequencies regarding the above questions.
>
>
>							BzzzzzzzzzzzzZap
>							Brent Caldwell
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