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Re: Flat Spiral Tesla Coils




From: 	Bert Wikkerink[SMTP:bert-at-mitra-dot-com]
Sent: 	Tuesday, July 01, 1997 8:56 AM
To: 	Tesla List
Subject: 	Re: Flat Spiral Tesla Coils

Tesla List wrote:
> 
> From:   Richard Wayne Wall[SMTP:rwall-at-ix-dot-netcom-dot-com]
> Sent:   Monday, June 30, 1997 5:46 PM
> To:     Tesla List
> Subject:        Flat Spiral Tesla Coils
> 
> 6/30/97
> 
> Nikola Tesla in the June issue of the 1919 Electrical Experimenter
> wrote the fifth article in a series called "My Inventions".  In this
> article he states that his laboratory was destroyed by fire in 1995.
> 
> NT wrote, " .   .   .   .  This calamity set me back in many ways and
> most of that year had to be devoted to planning and reconstruction.
> However, as soon as circumstances  permitted, I returned to the task.
> Although I knew that higher electro-motive forces were attainable with
> apparatus of larger dimensions, I had an instinctive perception that
> the object could be accomplished by the proper design of a
> comparatively small and compact transformer.  In carrying on the tests
> with a secondary in the form of a flat spiral, as illustrated in my
> patents, the absence of streamers surprised me and it was not long
> before I discovered  that this was due to the position of the turns and
> their mutual action.  Profiting from this observation I resorted to the
> use of a high tension conductor with turns of considerable diameter
> sufficiently separate to keep down the distributed capacity, while at
> the same time preventing undue accumulation of the charge at any point
> The application of this principle enabled me to produce pressures of
> 4,000,000 volts which was about the limit obtainable in  my new lab
> oratory at Houston Street as the discharges extended through a distance
> of 16 feet.  A photograph of this transmitter was published in the
> Electrical Review of November, 1998.  .   .   .  "
> 
> Tesla goes on to say that he had to go out in the open and this
> ultimately was why he went to Colorado Spring in 1999 where he remained
> for more than one year.
> 
> Recently, others on this list have had NT's same experience of very
> unimpressive flat spiral discharges.  Tesla nailed the problem of high
> interturn distributed capacitance and seems to have corrected it with
> spaced windings and high tension conductors.  I'm not sure he could
> accurately measure a 4,000,000 volt discharge, but he could probably
> quite accurately measure a 16 foot discharge.  To wit, our TC
> measurement technologies have not changed that much in a century.
> 
> None the less, Tesla was quite successful in design and function of his
> flat spiral geometries which were far more compact than his helical
> coils.  To that end, perhaps we should investigate the various
> parameters of flat spiral secondaries such as distributed capacities
> and inductances as we do in the helical varieties.  After
> "conventional" flat spiral secondaries are re-researched, a logical
> extension would advance to "magnifier" spiral secondaries.  And,
> ultimately flat spirals in liquid N2.
> 
> RWW

Cool,

I guess that we will have to wait a few years before they publish these
articles. I always thought that time travel would be cool, and it
appears that tesla accomplished it.  ;-)

Bert