Re: strike rail mystery. (fwd)

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Original poster: List moderator <mod1@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Sat, 2 Jun 2007 22:10:16 +0800
From: Peter Terren <pterren@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: strike rail mystery. (fwd)

The "variac" auto transformer effect is a real issue for those uncommon 
coils that have 2 layer primaries. Particularly because the ends are in 
close proximity and also because there may be redundant turns. In that case 
you might well find that 14kV applied being 16kV after resonant rise, rises 
to 25kV (with 8 of 13 turns used) which is 38kVpeak and will spark over an 
inch, or surface track several inches.
http://tesladownunder.com/Tesla%20display.htm#Specifications%20(upgraded)

Peter


> ---------- Forwarded message ----------
> Date: Fri, 1 Jun 2007 23:48:57 -0500
> From: resonance <resonance@xxxxxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: strike rail mystery. (fwd)
> In many cases, with classic Tesla coil setups, the experimenter forgets 
> that
> a "variac" autotransformer effect occurs across the very high Q primary
> coil.  If you have an extra 3-4 turns hanging on the primary, e.g., your 
> pri
> tap is in 3-4 turns from the end of the primary coil, very high potentials
> can exist across the end of the outer turn.
> ......>
> Dr. Resonance