Re: Magi initial design

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

Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 


Remember, atop a Tesla coil a toroid will actually have a capacitance 10%
less than it's free air capacitance.  The coil below acts as a shield for
the electrostatic lines and reduce the cap value approx 10%.

We measured this value for most all coils with a toroid to coilform dia.
ratio of 2:1.  7.5% works good if the ratio is 3:1.

Some programs may address this and automatically deduct it but you need to
ask the programmer if this has already been deducted in his program --- some
don't.

Dr. Resonance

Resonance Research Corporation
E11870 Shadylane Rd.
Baraboo   WI   53913
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, November 02, 2003 1:40 PM
Subject: Magi initial design


 > Original poster: "J. B. Weazle McCreath" <weazle-at-hurontel.on.ca>
 >
 >
 > Hello Coilers,
 >
 > Here's the starting design I've come up with for my first attempt at
 > building a magnifier style TC.  I'm open to any and all comments or
 > critisisms:
 >
 >     Primary - 12 turns of 1/4" copper tubing on 10 inch
 >               PVC form, tapped at 8.8 turns. L = 40 uH.
 >               With a 0.011 uF. cap,  Fres = 320 kHz.
 >
 >     Secondary - 8" x 24" of #12 (273 turns) on a 8 inch
 >                 PVC form.  Approximate L = 4.34 mH.
 >                 Fres = 700 kHz.
 >
 >     Extra Coil - 4.2" X 16" of #22 on 4.2 inch PVC form
 >                  L = 8.34 mH.  Fres = 320 kHz with a
 >                  toroid of 22 pF.
 >
 >     Toroid - 20" x 6" yielding 22 pF. as per WinTesla
 >              and other formulas.
 >
 > 73, Weazle, VE3EAR/VE3WZL
 >
 > Details of my "Hyperbaric Gap" and Tesla coil are at:
 > http://www.hurontel.on.ca/~weazle
 >
 >
 >