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Re: Tesla Coil toroid Size



Tesla List wrote:

> >
> > This is not necessary contrary to the findings of other coilers.  A larger
> > toroid will *not* increase the spark length in the case where the original
> > toroid is of the correct size or already too large.  See a recent posting
> > of mine for guidelines for proper toroid sizing.
> >
> > In general it would be
> > more correct to say as a general rule of coiling, that the proper toroid
> > size will give the longest spark, for a given power input, rather than
> > saying that a larger toroid gives longer sparks which is an incomplete
> > statement.  In coiling, many things must be matched up as needed for
> > best results.
> >
> > As one works with coils, these relationships among the different parts
> > of the coils become more fully understood and appreciated.
> >
> > John Freau

  I am amazed how my original adage about larger toroids ALLOWING longer
sparks
to be produced from a given coil system has been shortened to "larger toroids
give larger sparks" .  John is correct.

A small system producing 12" of spark off of a 9KV 60 ma transformer with a
12"
tall coil 4" in diameter is close to being maxed out.  Putting a larger toroid
on such a system will undoubtedly reduce the output spark.

Doubling the current supplied or raising the voltage will allow a larger
toroid
to produce larger sparks.  Still more power or a larger capacitor and yet a
further increase in size in toroid will again enlarge the sparking radius.
With
great skill and special circumstances (magnifier) this same small resonator
can
produce 10 feet of spark.

I should know, Magnifier 11-E has been doing it for a couple of years.  The
only
reason this can happen on this small resonator is related strictly to toroid
size and geometry.

The power for the spark comes from elsewhere.  The ability for the small
coil to
handle the energy and produce the spark to air without destruction is purely
toroid (field control) related.

Large toroids do not CREATE or MAKE longer sparks!!!  They ALLOW or FACILITATE
longer spark production.  ALL my writings on this subject have been most
specific that the larger toroid and longer sparks from a small resonator
demand
a an increase in input energy.


Richard Hull, TCBOR