Re: Info and requests for book

To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
Subject: Re: Info and requests for book
From: Tesla List <tesla-at-stic-dot-net>
Date: Thu, 18 Sep 1997 07:31:16 -0500
Approved: tesla-at-stic-dot-net

From: 	John H. Couture[SMTP:couturejh-at-worldnet.att-dot-net]
Sent: 	Thursday, September 18, 1997 12:24 AM
To: 	Tesla List
Subject: 	Re: Info and requests for book

At 05:51 AM 9/17/97 +0000, you wrote:
>
>From: 	terryf-at-verinet-dot-com[SMTP:terryf-at-verinet-dot-com]
>Sent: 	Tuesday, September 16, 1997 11:43 PM
>To: 	tesla-at-pupman-dot-com
>Subject: 	Info and requests for book
>
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  Terry -

 You also should have my books and JHCTES computer program. These items have
been recently brough up to date and contain much TC design information that
is not in the books you presently have.

  I agree there is much more TC design and theory for a new book. However,
you should know what is presently available if you want your book to be
original.

  A TC computer program that can do more than what is now available would
also be very valuable. It would take a lot building and testing TC's and
data collecting from your coils and from the TC tests of other coilers.

  I am sending you additional info by private email.

  Good luck on your new venture.

  John Couture      

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>Hi,
>        My name is Terry Fritz and I have been playing around with high
>voltages both professionlly and for fun for many years (23).  Just joined
>this group and I am interested in what's been going on in the world of Tesla
>Coils.  I have always had this desire to write up a paper or GBC bound
>"book" on Testla coil design.  I have the ones from Duane Bylund and D.C.
>Cox and I think I could add a great deal of info.  Coupling coefficients,
>secondary coil design, and secondary terminal design seem to need more
>detailed explanations and info.  Since these require either heavy math or
>computer analysis they tend to get left out.  However, They are VERY
>important.  If any one has a "wish list" of things they would like to see in
>a Tesla Coil design book please drop me an E-mail at "terryf-at-verinet-dot-com" .
>>From what I have seen here and in the archives it looks like capacitors,
>secondary inductors, and power sources are the big issues.  I guess I am
>somewhat surprised that there is so little theory.  I am looking for any
>info on the following:
>
>1.      Any information on the losses on the secondary such as secondary
>terminal capacitance change vs voltage, Energy loss vs voltage and time,
>ect. would be useful.
>
>2.      Has anyone tried using varistors (transient surge absorbers) instead
>of spark gaps for transformer protection?  I realize they my need to be
>isolated with chokes due to their capacitance but in quantity they are
>fairly inexpensive (1800V 4500A $1.88ea from DigiKey) and they can be easily
>chained together to reach a desired voltage.  I would think they would give
>much better protection than a spark gap.
>
>3.      Any info on predicting secondary parasitic capacitance or resonant
>frequency.  This is a big killer for most Tesla coils and the info I have
>seen tends to fall far short of what is needed.  There are certainly better
>ways to wind the secondary to reduce this capacitance but I have never seen
>any good details on doing this.  The programs and equations I have seen have
>never predicted any of my coils very well at all.  Virtually all Tesla coils
>tend to be big delay lines instead of antennas.
>
>I guess I am one of those who never saw too much mystery in how Tesla coils
>worked (although getting all the variables to work together is a challenge).
>I guess it is time to finally put this all in some kind of book.  I hope
>this doesn't take too much of the magic out of Tesla coiling but I feel that
>there needs to be better basic info.  Thoughts / Comments  let me know.
>
>        Terry
>
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