Re: Potato Chips (fwd)

---------- Forwarded message ----------
Date: Mon, 27 Apr 1998 16:50:26 -0400
From: John Heck <jkh-at-lexis-nexis-dot-com>
To: tesla-at-pupman-dot-com
Subject: Re: Potato Chips (fwd)

Uh, yeah, what he said. DON'T remove the varnish
insulation or your trannie will never be the same!
PS. When you sandblast or beadblast the thin silicon
steel laminations you are essentially "peening" the metal
on that side, thus causing it to curl. You do the same thing
when you turn it over. You can make the same goof with a
hammer, and it's better exercise, too!
> ---------- Forwarded message ----------
> Date: Mon, 27 Apr 1998 09:35:21 -0500
> From: David Dean <deano-at-corridor-dot-net>
> To: Tesla List <tesla-at-pupman-dot-com>
> Subject: Re: Potato Chips (fwd)
> -----Original Message-----
> From: Tesla List <tesla-at-pupman-dot-com>
> To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
> Date: Monday, April 27, 1998 12:07 AM
> Subject: Potato Chips (fwd)
> I don't know anything about transformer design, but over the years I
> have modified a few. I believe that the shelac or varnish on the
> laminations is there for electrical insulation. If you remove this
> insulation, the laminations will be able to "communicate" with each
> other electricaly. The result would be just like a single iron core, and
> with AC the hysterisis will produce a lot of heat, not much usefull
> work. Just my 0.02 maybe a transformer engineer will help with this.
> deano
> >
> >---------- Forwarded message ----------
> >Date: Sun, 26 Apr 1998 05:08:25 -0700 (PDT)
> >From: gweaver <gweaver-at-earthlink-dot-net>
> >To: Tesla-at-pupman-dot-com
> >Subject: Potato Chips
> >
> >The laminations on one of my unpotted neons is out of square.  The
> thing is
> >twisted looking and I don't like the way it looks so I took it all
> apart.
> >The laminations were stuck together with something like varnish or
> >polyurethane.  I decided to sand blast the laminations to remove the
> >varnish.  When the sand hit one side of the lamination it instantly
> curled
> >up like a potato chip. The varnish came right off.  I turned the
> lamination
> >over and sand blasted the other side and the metal instantly curled up
> in
> >the other direction.  I tried to straighten it out by sand blasting
> back and
> >forth a little on each side but it won't straight up. I tired hammering
> it,
> >but its still not flat.  I tried 3 more laminations and they did the
> same
> >thing.  There must be some type of stresses in the metal that cause
> this to
> >happen.  WARNING, don't sand blast transformer laminations. Acetone
> takes
> >the glue stuff off of the lamination with no trouble at all.  Just let
> the
> >lamination soak about 15 minutes.  You don't even have to wipe them
> clean
> >with a rag.
> >
> >Gary Weaver
> >