Re: NST robustness

• To: tesla-at-pupman-dot-com
• Subject: Re: NST robustness
• From: FutureT-at-aol-dot-com (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Fri, 25 Feb 2000 16:41:38 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

In a message dated 00-02-25 07:04:05 EST, you write:

<< 
> Have you found any evidence that a 15kV NST dies more readily 
> than a 12kV NST if the gap is set only to, say, 15kV?  I'm interested 
> in the idea that the higher voltage transformer might have thinner 
> wire despite an identical current rating. If they had the same size 
> wire and core however, I think your argument sounds quite plausible.
 
> Regards,
> Malcolm >>

Hi Malcolm,

I generally set my safety gaps to 7/16" using the 12/30 NST's, and
have had no failures, but when I used the same setting for a 15/30, 
it failed quickly.  This was just one case, so it's not much evidence,
but it started me thinking.  The wire may be the same thickness,
since it's the same current, I don't know.  I opened a bunch of 12
and 15kV blown NST's to salvage the core metal, but I didn't
measure the wire.  The cores seemed to be the same, or very
similar.

Regards,
John Freau

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