RE: Disassembling transformers

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Dave Halliday" <dh@xxxxxxxxxxxxxx>

The idea was to separate the tar from the transformer.  Freeze it solid
and then melt a little layer next to the transformer so the chunks can
come off easier and with less chance of damaging the wiring. It was not
to melt the tar in its entirety.

Tar and solvent is basically what asphalt sealer is so Richards use was
OK if you stick with kerosene.

Dave

> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: Friday, February 10, 2006 2:15 PM
> To: tesla@xxxxxxxxxx
> Subject: RE: Disassembling transformers
>
>
> Original poster: "Lau, Gary" <Gary.Lau@xxxxxx>
>
> Since it's current-limited, running an NST with the secondary shorted
> won't draw any more power than its faceplate rating.  So I don't know
> how that could result in melting of the tar.
>
> I used an enclosed Weber BBQ grill to cook my NST and melt the whole
> stinkin' mess - a process I hope I never have to repeat!  I used paint
> thinner for the final dissolve.  If someone had poured that
> mess onto my
> driveway, they would definitely be off my Christmas card list.
>
> Regards, Gary Lau
> MA, USA
>
>
>  > Original poster: "Dave Halliday" <dh@xxxxxxxxxxxxxx>
>  >
>  > Richard Quick suggested freezing but then running the
> transformer with
> a
>  > short across the HV output for an hour or two.  This will warm the
> core
>  > enough so that the chunks of frozen tar can be pulled away without
>  > damaging the windings.
>  >
>  > He used kerosene (a lot less dangerous) and mentioned that the
>  > tar-kerosene mixture was an excellent sealer for asphalt
> driveways if
>  > you have one.
>  >
>  > Dave
>  >
>  >  > -----Original Message-----
>  >  > From: Tesla list [mailto:tesla@xxxxxxxxxx]
>  >  > Sent: Thursday, February 09, 2006 9:13 PM
>  >  > To: tesla@xxxxxxxxxx
>  >  > Subject: RE: Disassembling transformers
>  >  >
>  >  >
>  >  > Original poster: "Robert Hanford" <pomnept@xxxxxxxxxxx>
>  >  >
>  >  > Hi,
>  >  > I froze my NST, chipped away some or the tar, then soaked it
>  >  > in gasoline til
>  >  > almost all the tar was gone. Don't remove all of the shunts.
>  >  > There is good
>  >  > internet material on this. I think a lot of us have
> stories about
> this
>  >  > particular aspect of coiling.
>  >  > Good luck,
>  >  > Robert Hanford
>  >  >
>  >  > -----Original Message-----
>  >  > From: Tesla list [mailto:tesla@xxxxxxxxxx]
>  >  > Sent: Thursday, February 09, 2006 10:38 PM
>  >  > To: tesla@xxxxxxxxxx
>  >  > Subject: Disassembling transformers
>  >  >
>  >  > Original poster: norman@xxxxxxxxxxxxxxxxxxxxxxxxx
>  >  >
>  >  > Has anyone tried to open up an OBIT or NST and dissolve the
>  >  > potting material
>  >  > in
>  >  > order to remove the magnetic shunts?  If so, could you
> explain how.
>  >  >
>  >  >
>  >  >
>  >  >
>  >
>
>
>
>