RE: Unpot ++

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Lau, Gary" <Gary.Lau@xxxxxx>

When I had my Jefferson 15/60 unpotted and apart, I toyed with the idea
of cutting the laminations to achieve a shunt reduction, but it was
clear that anything I tried would leave the laminations less than
perfectly flat, and then I'd never get it back together again.  But
since that same transformer now pulls in excess of 20A from the wall,
I'm glad I didn't do anything to supercharge it any further.

Regards, Gary Lau
MA, USA

> Original poster: "Mike" <mike.marcum@xxxxxxxxxxxx>
>
> The shunts are part of the core itself iirc (small "legs" sticking
> out betwen the primary and secondary). I'd remove 1/3-1/2 of 'em
> (50-100% more current depending on how big a duty cycle you want)
> with a dremel tool.
>
> Mike
> ----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Tuesday, November 29, 2005 2:48 PM
> Subject: RE: Unpot ++
>
>
> >Original poster: "Rich" <rdjmgmt@xxxxxxxxxx>
> >
> >Gary
> >
> >I agree I should have but then I did not because of the wife, the
tar,
> >the wife, the oven, the wife. Get the idea. I will follow your lead
on
> >putting it back together.
> >  I will put in back in an oil bath, no tar. If I can seal the lower
part
> >of the steel box, if not I will build a 6mm Lexan box, I have the
scrap
> >lexan.
> >  The Jefferson does not appear to have shunts that I could remove.
Is
> >any one on the list familiar with the inside of a Jefferson?
> >
> >Rich
> >
> >Subject: Re: Unpot ++
> >
> >Original poster: gary350@xxxxxxxxxxxxx
> >
> >You should have put the transformer in the kitchen oven for about an
> >hour to melt the tar.  The tar can be poured off like water.  Wrap
> >the #36 wire several times around a lead out wire and solder
> >it.  Cover the coil with several layers of fiberglass tape the kind
> >you buy from a motor rewind shop.  Lay the lead out wire on top of
> >the tape then wrap another layer of tape of it.  Put 2 layers of
> >polyurethane varnish over the tape.  Put the coil back in the
> >transformer leaving out some of the shunts.  Melt the old tar in pan
> >stir in 50% high voltage oil.  The oil will mix fine with the
> >tar.  The tar will dry soft with all that oil.  Put the transformer
> >back into the original case and pour the hot tar over it.   You can
> >also build your own box and fill it with 100% high voltage oil with
> >the unpotted neon inside.  A unpotted neon in 100% HV oil makes a
> >bullet proof neon.
> >
> >Gary Weaver
> >
> >
> >
> >-----Original Message-----
> >From: Tesla list <tesla@xxxxxxxxxx>
> >Sent: Nov 26, 2005 6:02 PM
> >To: tesla@xxxxxxxxxx
> >Subject: Unpot
> >
> >Original poster: "Rich" <rdjmgmt@xxxxxxxxxx>
> >
> >I have had a transformer soaking in gas for awhile, I just took it
> >out and cleaned it up with lacquer thinner. What a mess! Now to my
> >question, the secondarys are a mess and nicked on the outer windings.
> >, I goofed and was too rough a while back trying to remove the tar.
> >The transformer is a Jefferson 15Kv 60ma. The secondarys are about
> >36ga wire and I don't have any butt splices that size but I do have
> >some .004 copper sheet from a transformer winding. My question is
> >would it work to lightly sand the outer windings and solder a strip
> >of the .004 copper to it for a lead point? I do not feel safe trying
> >to solder to the end of the 36ga.
> >If it works I plan on making a Lexan box for it.
> >
> >Rich
> >
> >
>
>
>