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Re: NST proximity interference.
Original poster: "Garry F. by way of Terry Fritz <twftesla-at-uswest-dot-net>" <garryfre-at-pacbell-dot-net>
The case is a triple deck case designed to be a self contained unit and has
a lower deck to contain the NST or NST's which is 6" high, and the upper
deck contains the spark gap, and the MMC and cooling fan. The top holds the
This was constructed according to specks I got from www.sciencefirst-dot-com
With this configuration, the NST is at least 7" below the primary.
I will have to construct a completely different kind of setup, probably with
the NST being external to the case. I would probably make a place to put the
NST in the case for carrying otherwise, knowing from past experience, I
would take the coil somewhere to demonstrate it and then discover I had left
the NST at home.
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
Sent: Sunday, December 17, 2000 8:14 AM
Subject: RE: NST proximity interference.
> Original poster: "Lau, Gary by way of Terry Fritz <twftesla-at-uswest-dot-net>"
> I'm not sure what you mean by "mounting the NST inside the case". Do you
> just mean near the primary? I performed some experiments to determine the
> effect of locating the NST near the primary coil. At a distance of
> a foot, there was a small loss due to eddy currents in the metal of the
> Losses grew worse as the NST/primary space narrowed.
> Regards, Gary Lau
> Waltham, MA USA
> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Sunday, December 17, 2000 12:38 AM
> To: tesla-at-pupman-dot-com
> Subject: NST proximity interference.
> Original poster: "Garry Freemyer by way of Terry Fritz
> <twftesla-at-uswest-dot-net>" <Garry-at-NDFC-dot-com>
> After testing the new cap from Sundog and the NST I have, I mounted the
> inside the case and hooked it up and noticed that the sparks were slightly
> shorter as if the proximity of the NST ~7" was warping the magnetic field
> the flat primary.
> Maybe, a setup where the NST were external or positioned differently,
> be more efficient.