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Re: [TCML] Re: Coil Died
I used a high dollar gas oven and set the temp for low (don't remember the temp). Added 5°F every half hour 'til I hit the right temp. No smell, and no mess. I scooped most of it out with wooden tools, like paint stirrers and chop sticks.
However, if all you have is a carbon track through potting compound cracks, some have had success with just melting then cooling. A continuity test will tell you if your secondaries are open circuited or short circuited.
On Saturday, October 19, 2013 8:22 PM, Dave Halliday <dh@xxxxxxxxxxxxxx> wrote:
'the awful smell in the oven' only happens if you get it too hot.
Buy a cheap toaster oven at Goodwill and stand it on its back (make a box of
cardboard that is the same size as your NST to check tht it will fit). Set
it at low temp and let it sit for a few hours. Check the tar. If it is not
the consistency of heavy motor oil, raise the temp ten degrees and wait
another two hours.
Do this outside on a sheet of plywood on a cement surface and you will be
fine.
Dave
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx
> [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of Ed Phillips
> Sent: Saturday, October 19, 2013 15:06
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Re: Coil Died
>
> I'll add my experience. Nothing new of course but when 'one
> end' of an
> NST is bad and probably partially shorted through a track in the tar,
> I've been successful on several occasions by using a really
> high power
> hot air gun to melt the tar there. Takes a long time with
> heat applied
> to case and top of tar until is's very liquid and a lot safer than
> digging into the tar and finding the leads.
>
> Hasn't always worked but the time invested trying is well
> spent. I've
> never tried heating the whole transformer in an oven because
> of the fire
> danger and the time it would take to melt and then cool.
> There's also
> 'the awful smell in the oven'.
>
> Ed
>
> Dave Halliday wrote:
>
> >You can get carbon tracks through the tar.
> >
> >Search the Pupman site for more info:
> >
> >https://www.google.com/search?q=tar&sitesearch=www.pupman.com
> >
> >Dave
> >
> >
> >
> >
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> http://www.pupman.com/mailman/listinfo/tesla
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