Re: NST Fix

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

Original poster: "Luc by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ludev-at-videotron.ca>

Hi Ry,

Tesla list wrote:
> 
> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<rblaisdell-at-juno-dot-com>
> 
> On Sun, 20 Jan 2002 11:10:47 -0700 "Tesla list" <tesla-at-pupman-dot-com>
> writes:
> > Original poster: "Luc by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> > <ludev-at-videotron.ca>
> >
> > Hi,
> >
> > Personally I used a piece of plywood in place of the PVC because
> > some time the transfo could get really hot. I put the wood in
> > oven at 250 F for 2 hours and cook it in oil for half an hours to
> > get the humidity put. Not sure but I think pig used wood too.
> >
> > Cheers,
> >
> > Luc Benard
> >
> >
> Yes, but with the thing immersed in soybean oil, which by the way is very
> good insulator some capacitor company already has patented the use of it
> in there capacitors, the heat is negligible.
> 
> Also the wood is likely to conduct at 15kv and create carbon tracks in it
> that conduct even better.

I could be wrong with that but in my experience really dry wood
saturated by oil have not tendency to carbon track, but I agree
with you that wood with out special treatment carbon tract
easily, wood that are standing inside house have always 10% or
more humidity.

Cheers,

Luc  
> 
> Though you are right in saying that pvc does melt at a low temperature,
> though no problems for me yet.
> Polystyrene would be a bit better I just happen to have alot of 1/4 exp.
> pvc available to me, polystyrene, plexiglass(or equiv),lexan(or equiv)
> comes in a variety of sizes and thicknesses at your local plastic supply
> place and would all work well, that is if you live in a big enough town
> to have a local plastic supplier.
> 
> Peace,
> 
> Ry Blaisdell
> 
> >
> > Tesla list wrote:
> > >
> > > Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> > <rblaisdell-at-juno-dot-com>
> > >
> > > Surplus ammo boxxes from a Military Depot. work good there are
> > sealed and
> > > water tight,
> > > You will have to make spacers to hold the core in place I used
> > 1/4"
> > > expanded pvc.
> > > peace,
> > >
> > > On Sat, 19 Jan 2002 09:21:47 -0700 "Tesla list"
> > <tesla-at-pupman-dot-com>
> > > writes:
> > > > Original poster: "Lau, Gary by way of Terry Fritz
> > > > <twftesla-at-qwest-dot-net>" <Gary.Lau-at-compaq-dot-com>
> > > >
> > > > >Original poster: "Cory Roussel by way of Terry Fritz
> > > > <twftesla-at-qwest-dot-net>"
> > > > <imcuddlycory-at-yahoo-dot-com>
> > > > >
> > > > >I heard the main problem with used NSTs is cracking
> > > > >tar causing them to fail... does this mean they
> > > > >internally arc?
> > > >
> > > > Yes, exactly.
> > > >
> > > > >Could an NST be depotted and then submerged in oil?
> > > >
> > > > Yes, but it's difficult to find a robust container that won't
> > > > eventually
> > > > leak or spill.  I used melted Vaseline petroleum jelly to pot
> > my
> > > > resurrected NST, which re-jelled after it cooled.  Guaranteed
> > not to
> > > > leak!
> > > >
> > > > Gary Lau
> > > > MA, USA
> > > >
> > > >
> > > >
> > > >
> > > >
> > > >
> >
> >
> >
> >