Re: darn the formula torpedoes

["Antonio Carlos M. de Queiroz" <acmq-at-compuland-dot-com.br> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Tesla list wrote:

> Original poster: "Metlicka Marc" <mystuffs-at-orwell-dot-net>

> john, this is interesting, could the added length be do to the magnetic field
> coupling into the windings of the extra coil when you placed it onto the
> driver?

Yes.

> i actually see a couple reasons why a magnifier would be less efficient, one
> being the resistance of the transmission line connecting the driver to the
> extra
> coil? 

No. It's insignificant compared to the other losses. The capacitance of
the "transmission line" and other elements at the interconnection, if
not 
with the right value, may really be prejudicial.

> the other being that the extra coil is removed from the flux of the
> primary,

No problem at all. It's perfectly possible to build a magnifier (or
by the way a conventional Tesla coil) with totally uncoupled coils,
connected by wires.

> i know that in the corum papers that they state that the
> inductance into
> the secondary windings is not an issue, but i can't see how it wouldn't
be? if
> the driver is wound with say, 300 turns and the extra coil with say 800,
> then the
> flux only couples into the 300 turns, or am i missing something here? 

All the three inductances are important, and the three capacitances too.
The most important relation is that the primary circuit must be tuned
to the same frequency of the sum of the secondary and tertiary 
inductances with the terminal + self capacitance of the third coil.
But there are other relations (formulas!) for an optimized design.
See http://www.coe.ufrj.br/~acmq/tesla/magnifier.html.

Antonio Carlos M. de Queiroz