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RE: Superiority of the magnifier

Adam -

Tesla said the magnifier should produce more output than the classical coil
because the extra coil is out of the magnetic field of the primary. This
field tends to limit the gain in the secondary. I do not believe anyone has
ever performed the proper tests to compare two large systems.

Several years ago I built a small classical coil and tested it then
converted it with an extra coil but both outputs were the same when using
the same input wattage. However, small Tesla coils have high efficiencies so
any possible gain would be negligible. Large Tesla coils are less efficient
and may show a gain when the extra coil is added but this has never been

Theoretically the Tesla coil coupling only changes the energy transfer time
and not the amount of energy transferred. Coupling has to do with magnetic
circuits where there are no gains or losses. Only electric circuits have
gains and losses. A magnetic flux line (maxwell) leaves the Tesla primary
and links with the secondary with no gain or loss. However, the currents
involved have I^2R losses.

John C.


-----Original Message-----
From: Tesla List [mailto:tesla-at-pupman-dot-com]
Sent: Thursday, June 01, 2000 9:17 PM
To: tesla-at-pupman-dot-com
Subject: Superiority of the magnifier

Original Poster: "Adam Parker" <park_e_r-at-hiwaay-dot-net>

For those on the list who have fiddled with a Tesla coil until they have
squeezed every last possible inch of spark out of it, and those who have
around with magnifiers, what is the general theory among list members on the
advantages of a magnifier (if any)?

It seems that even after quite e few of us have experimented with a three
arrangement, the specicifics on "just why should we build one" still remains
indecisive and sketchy. Some people even argue that the extra coil principle
offers no real advantages over the "classic" system at all.

Just to quench my curiosity, I'd like some opinions from list members on
they think gives the magnifier the upper hand in performance.

And of course, here's my own two cents:

It seems to me that the main advantage comes from the huge coupling
between the primary and secondary coils. This means a great deal more of the
power is making it to the spark than is in a regular two coil system. There
plenty of claims that support the "de-coupled" theory, saying the the
of mutual inductance between the extra coil and the rest of the system makes
the difference. It may make a difference. It may make a big difference. I
certainly believe from my experiences that most of the gain comes the the
higher coupling.

What does eveybody else think? I sure hope I haven't stepped on anyone's