Re: Tesla's large pancake coil

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: wysock@xxxxxxx 

Hello Bill B. & company.

There is experimental proof that Tesla's "pancake" design of coils are (most
likely), the most efficient that can be achived.  Please see Jeff 
Behary's web site:
http://www.turnofthecenturyelectrotheripymusem.com.  Jeff has 
recreated (on a table-top
scale), many of Tesla's "pancake" designs, which includes refinements by others
(who were contemporaries of Tesla's at the time), including Kinraide 
and others.

If you look at my web site: http://www.ttr.com, and click on the 
"Model 13" pages,
you will see after you scrool down, that there is a white paper that 
I first presented
at the (now defunct) ITS (International Tesla Society).  That paper 
starts out with my
proposal for building Model 14M.  Look at the drawings and see about this part
of my proposal.  It was to utilize a "hybrid" version of Tesla's 
"pancake coil",
not unlike how modern r.f. coil assemblies are built today.  That is 
to say, not
a single turn in a flat spiral like Tesla, but rather, a cascading 
number of turns
progressing from the outside diameter of the inductance, to the inner portion.
Small r.f. coil assemblies of today, use this design in what is 
called a "basket weave"
pattern.  This technique reduces the total amount of distributed capacitance of
the total coil assemby, without sacrficing on the total amount of 
inductance.  I
believe it was Fritz Lowenstein (a long-time assistant to Tesla), who 
came up with
this concept.

Bill B.  I think you are right in surmizing that this form of 
construction does in fact,
"shape" the electrostatic lines of force around the inductance,  just 
as a toroid
does on top of a classical Tesla coil.  My hope was to bring the "best of
both worlds" to reality.  Unfortunately at the time, my "financial 
partners" did
not agree and told me to "go back to the drawing board"...which I did, and
thus, Model 13M (as a 1/2 scale compromise without the hybrid pancake
master oscillator), was born.

Best regards,
Bill Wysock.

Date sent:      	Fri, 29 Sep 2006 16:24:30 -0600
To:             	tesla@xxxxxxxxxx
From:           	"Tesla list" <tesla@xxxxxxxxxx>
Subject:        	Re: Tesla's large pancake coil
Forwarded by:   	tesla@xxxxxxxxxx
Date forwarded: 	Fri, 29 Sep 2006 16:25:02 -0600 (MDT)

> Original poster: William Beaty <billb@xxxxxxxxxx>
>
> On Thu, 28 Sep 2006, Tesla list wrote:


> Heh.  There's really no need to use biased language make the drawing seem
> questionable.  It's already questionable! It's a drawing!  No doubt the
> drawing contains many details which differ from a photograph made of the
> same event.
>
> Now here's some science, as opposed attempted Floccinaucinihilipilification*
>
>    QUESTION:  If we actually build a large pancake-style TC secondary, and
>    mount a sphere terminal on the end of a central rod, then does the
>    discharge tend to occupy a fairly narrow cone which is directed
>    outwards from the pancake coil?      Yes or no.
>
> If nobody has experimentally determined the answer by building and
> operating such a pancake-shaped secondary, then we have no business
> pretending that we know the answer.
>
> If we want to adopt a scientific attitude, then we're not supposed to
> choose sides or to leap to unwarrented beliefs, instead we should remain
> tenative in the face of the unknown, and as Faraday said, "Let the
> experiment be made."
>
> I was hoping that the experiment ALREADY was "made" by someone here, so
> they'd give an answer.


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