Re: Transformerless Tesla coil

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jason Johnson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <hvjjohnson13-at-hotmail-dot-com>

This post reminded me of something posted a few years back by Dr
Resonance on a magnifier thread. We were talking about the operation of
magnifiers when someone came up with the idea of eliminating the driver
coil, and thus the worries of flashover there and other problems with
the primary etc. He said that they had done this before by taking a
normal disruptive coil with two coils tuning it and then removing the
secondary coil to a remote location and connecting the base of the
secondary coil to another tap on the primary right by the first tuning
tap with some heavy gauge wire, such as welding cable. I never did try
it at the time, but now that I have thought of it again, I may have to
give it a go next time I run my coil. The only problem I see with this
is that if you got hold of the streamers you would be connected directly
to the tank circuit, but then again you shouldn't get hold of the
streamers anyway.


<< Jason R. Johnson >>
G-3 #1129
The Geek Group
http://www.thegeekgroup-dot-org/

"The two most common elements in the universe are hydrogen and
stupidity."
 -Albert Einstein

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Thursday, August 01, 2002 9:36 AM
Subject: Re: Transformerless Tesla coil


> Original poster: "Antonio Carlos M. de Queiroz by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>
>
> Tesla list wrote:
> >
> > Original poster: "harvey norris by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <harvich-at-yahoo-dot-com>
>
> > Please keep us informed of how coupling might increase
> > the performance, is the coupling the only difference
> > from OUDIN DESIGN? The title is somewhat non
> > descriptive as regarding the actual input to primary,
> > which DOES use the transformer of an NST. Are you
> > specifically stating that NO air core tranformer
> > action takes place, but rather simply that made by
> > line connections alone? Is this not also similar to
> > current magnifier designs, which also employ little or
> > no coupling between the frist and second secondaries?
>
> The NST transformer is just a power source, that could be many other
> devices, and is unrelated to the operation of the RF system.
>
> The Oudin system uses an autotransformer instead of separated
> primary and secondary coils. It then uses magnetic coupling
> and a direct connection.
>
> A direct connection is really used for the coupling between the
> secondary and third coils of a magnifier. It is also possible to
> make a magnifier without magnetic coupling, with only
> magnetic couplings, or with both.
>
> Antonio Carlos M. de Queiroz
>