MOSFET Coil Paper

• To: tesla-at-pupman-dot-com
• Subject: MOSFET Coil Paper
• From: Alan Sharp <AlanSharp-at-compuserve-dot-com> (by way of Terry Fritz <twf-at-verinet-dot-com>)
• Date: Thu, 04 Feb 1999 02:17:42 -0700
• Approved: twf-at-verinet-dot-com

Terry,

Thanks very much for posting this paper, I was doing similar exeriments
myself but on the dining room table and with a scope that has had better
days, so I drooled over the desciption of his test conditions!

His essential conclusion is that before breakout the the input impedence is
close to that of a quarter-wave antenna. I'm not a radio type so is there a
general equation giving the inpit inpedance of a quater wave antenna.

Have fun,

Alan Sharp (UK)


>       Dr. Gary Johnson has written a very interesting paper on the input
>impedance of a MOSFET driven Tesla coil called "Input Impedance of a Tesla
>Coil".  I scanned the pages and posted them (with his permission) at:

>http://www.peakpeak-dot-com/~terryf/tesla/misc/

>The file names are GLJ-1.jpg to GLJ-9.jpg .  They are large files to
>preserve the quality.

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