Re: NST failures

["Trent Mullins" <neontrent-at-earthlink-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hello Brian and Dan,

For whatever reason, NST failure IS DEFINITELY directly related to lead
length.  As mentioned below, the side with the longer lead will fail first
(if failure is inevitable).  Most installers and designers configure NST
placement in the middle of the series loop.  One common way to avoid long
lead length is to "mid-point ground" the NST.

If you can visualize an NST placed dead center between a length of neon
tubing, connected with short leads to the unit on each side, then the end
unit on each side is wired directly to ground.  This setup works well with
properly loaded NSTs and a good ground.

Overall, I would recommend keeping lead lengths as short as possible for
neon applications, but as far as Tesla applications, I doubt of any
significant benefit.

Trent Mullins
"Bendin' Glass 'n Passin' Gas"



----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, August 02, 2000 8:17 PM
Subject: RE: NST failures


> Original poster: "Basura, Brian" <brian.basura-at-unistudios-dot-com>
>
> Dan,
>
> Sounds like an Urban Legend to me. I can't see any way lead length would
> affect the reliability of a NST. But maybe Neon Trent can shed some more
> light on the subject (Neon light that is)...
>
> Regards,
> Brian B.
>
> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Wednesday, August 02, 2000 5:37 PM
> To: tesla-at-pupman-dot-com
> Subject: NST failures
>
>
> Original poster: "Dan Kunkel" <dankunkel-at-hotmail-dot-com>
>
> I spent a little time talking the guys at the neon shop a few days ago.
One
> guy told that a major cause of failure for NST is when rookie sign
> installers use different wire lengths coming out of each terminal from the
> secondary connecting to the neon tube. The side with the longer wire will
> fail.
>
> I am wondering if this has any bearing in the world of coiling?
>
> dan
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