RE: Re: Question:

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

Original poster: "Loudner, Godfrey by way of Terry Fritz <twftesla-at-qwest-dot-net>" <gloudner-at-SINTE.EDU>

Hi Albert

I am guessing about the purple haze. In some way the failing of the NST's
secondary increases in the inductance in the primary circuit of the tesla
coil causing it to go out of resonance. But the secondary of the tesla coil
is still absorbing a lot of energy because of the increased inductance. The
purple haze is related to the non-resonance and the massive arcs to the high
energy absorption. I am not able to supply details at this time to my cloudy
picture. 

Godfrey Loudner


> -----Original Message-----
> From:	Tesla list [SMTP:tesla-at-pupman-dot-com]
> Sent:	Wednesday, June 06, 2001 5:56 PM
> To:	tesla-at-pupman-dot-com
> Subject:	Re:Re: Question:
> 
> Original poster: "albert hassick by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <uncadoc-at-juno-dot-com>
> 
> Hi all, Terry,Gene.   Well, I have to totally agree with Terrys
> explanation about the Allanson trannys.  I have four of them unpotted and
> two shunt laminations removed from both + and - sides of the secondaries.
>  They are relatively easy to unpot (more or less) from the tar medium,
> and seem indestructible once they are unpotted and polyurethaned.  I
> would bet that they would be even better immersed in some kind of mineral
> oil etc.  I run mine open air with about a zillion coats of poly on them.
>  Of the four that I have I was able to salvage three of them.  All were
> brand new from 'Just Neon' in New York, and all died bravely in Tesla use
> while pushed to the limit.  All of them were gloriously destroyed in
> their factory steel case. The one that was not salvageable was burned in
> its secondary way down inside, very close to the core and was not
> repairable. But a fellow list member has been kind enough to give me his
> personal details of rewinding the secondaries to give a small pole pig
> upon the existing neon laminations.  I have not done this rewinding.  But
> nonetheless the other three neons are more than willing to give their
> best to Tesla use as unpotted and shunt removed trannys.  They give out
> 7,500 volts per side, like Terry said and are quite potent as neons go.
> But one thing I did notice when the trannys were new and still encased in
> the factory steel and tar shell, is that for a short period of time; Just
> before they shorted out in the shell that there was a very dense purple
> corona field better than two feet around atop the secondary coil, like a
> giant purple ball several feet around with massive arcs emanating from
> the sides of the purple plenum. And the giant purple cloud seemed to want
> to lift itself away from the top of the secondary.  Could this possibly
> have been a Tesla fireball ready and waiting to lift off just before the
> trannys shorted out? A feat I cannot duplicate with the unpotted
> versions.  Something happened to create this dense purple field atop the
> secondary just a few moments before they shorted out.  Like I say, I have
> not been able to duplicate that massive purple corona cloud since....Is
> it possible that a occurrence like this could be the start of Teslas
> fireballs?  So anyway, when factory new, the Allanson neons seem capable
> of exemplary corona and spark output when pushed to the limit.  These are
> just my observations.    Al
> 
> On Wed, 06 Jun 2001 11:24:10 -0600 "Tesla list" <tesla-at-pupman-dot-com>
> writes:
> > Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
> > 
> > Hi Gene,
> > 
> > It Allanson is a very popular NST brand.  It is perfect.  Each side 
> > is 7500
> > volts with the center of the secondary winding connected to the 
> > case
> > (ground) which is they way all NSTs like this are.  The two sides 
> > are 180
> > degrees out of phase so there is 15000 volts between them.  
> > Basically, one
> > side is at +7500 volts above ground at the same time the other side 
> > is
> > -7500 volts below ground.
> > 
> > Cheers,
> > 
> >         Terry
> > 
> > 
> > At 09:59 AM 6/6/2001 -0700, you wrote:
> > >I am collecting parts for a future Tesla coil project. I bought a 
> > NST that
> > >I've never seen mentioned before, and am wondering what the list 
> > thinks of
> > >it.
> > >
> > >it is a:
> > >
> > >Allanson
> > >
> > >15kv-at-60ma
> > >
> > >The spec I'm not sure about is this:
> > >
> > >The secondary is "midtap grounded."
> > >
> > >What does that mean?
> > >
> > >Regards,
> > >
> > >Gene lambert
> > >
> > >
> > >
> > 
> > 
> > 
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