Re: NST outer layers, was Re: chokes

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

Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>" <evp-at-pacbell-dot-net>

Tesla list wrote:
> 
> Original poster: "Jon Tebbs by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<jgtebbs-at-eos-dot-net>
> 
> Hi Ed, List,
> 
> I can provide first hand confirmation from two depotted NSTs that died
> from excessive static gap width in the early 1990's. The voltage
> distribution certainly seems to be concentrated in the outer layers. In
> both of these cases the burned spot on the secondaries was about one
> third in from the outside layer, on the side and had arced to the core.
> 
> Anyone else have a similar observation?
> --
> Jon G. Tebbs
> <jgtebbs-at-eos-dot-net>
> 
> Tesla list wrote:
> >
> > Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <evp-at-pacbell-dot-net>
> 
> snip--
> 
> >         Network simulation is not experimental, and the results are
> valid.  It
> > is obvious that a lot of chokes that have been described here would do
> > nothing at all, and therefor at best be harmless.  Terry is correct and
> > chokes are a waste of time.  Resistors will do more good, backed up with
> > the MOV's or plain safety gap directly across the NST secondary.
> >
> >         One useful contribution to general knowledge here would be for
> someone
> > to go to the trouble of trying to model the outer layers of an NST
> > secondary and then determine current and voltage distribution during a
> > discharge.  Can surely be accomplished by modern modeling techniques,
> > but I don't know how to do it.
> >
> > Ed

	Very interesting.  Did you by any chance take a picture?  Did the
carbon track go along all of the inner layers to make its way to the
core?

Ed