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RE: Magnifying Tesla Coils



Original poster: "Qndre Qndre" <qndre_encrypt@xxxxxxxxxxx>

Hi Sebbie,

a "magnifier" is a resonant transformer which is built the same way as Nikolai Tesla did as he tried to distribute electrical power using his "Wardenclyffe" transmitter. It consists of a driver circuit and a resonator circuit connected using a transmission line. The driver circuit looks the same way as a pulsed tesla coil does: A capacitor with a high capacitance is charged to a high voltage until a spark gap brakes down and connects it to a coil with low inductance. This circuit then oscillates causing a "secondary circuit" which consists of a coil with a big inductance and a very small capacitance to go into resonant rise resulting in a high voltage output at a high frequency just like a normal tesla coil.

To get a magnifier, you have to chose a topload with a very high breakdown voltage for your secondary so you have no streamers going into the air because they only represent energy loss in this place. The secondary is not the place where the discharges will take place. You connect a wire to the topload of this coil. The other end of the wire is connected to a tertiary coil called the "extra coil". It forms the second big part of a magnifier, the resonator, while the classic tesla coil (which won't emit streamers because of the big topload) acts only as a driver for the resonator. The other end of the tertiary (the one not connected to the topload of the secondary) has a topload placed on it which has a breakdown voltage causing streamers into the air.

The calculation and tuning of a magnifier will be much more complicated compared to the calculation of a conventional tesla coil because you will have to have three coils and several capacitances all operating on the same resonant frequency in order to get the best possible output.

I hope this will help you a bit.

Regards, Q.

PS: This is a website about the calculation and simulation of such a circuit. It seems to be very complicated: http://www.coe.ufrj.br/~acmq/tesla/magnifier.html

----Original Message Follows----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Magnifying Tesla Coils
Date: Tue, 15 Nov 2005 18:17:47 -0700
Original poster: "Sebastian Fischetti" <QuantumStrings@xxxxxxx>

Hey,
I'm a high school senior, and I'm currently working on a 1.5'-tall tesla coil for fun. While surfing the web for info on tesla coils, I noticed that <http://www.tesla-coil.com>www.tesla-coil.com mentions a magnifying tesla coil. However, no theory of operation is included. I tried to google up more information, but I couldn't find anything else on the topic, except for the additional blurb on Tesla biographies. So, would anyone care to take the time to explain to me the theory behind magnifying tesla coils, and how they're constructed? Thanks a bunch!


-Sebbie