RE: [TCML] Re: Coil Died

["Dave Halliday" <dh@xxxxxxxxxxxxxx>]

Hi David

These techniques were done before MOTs and Pole Pigs became readily
available.

By submerging the de-potted NST in mineral oil, you could run them at a
higher voltage (up to 160) and get more power. People would also parallel
them for more current. 

Dave

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx 
> [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of David
> Sent: Saturday, October 19, 2013 17:45
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Re: Coil Died
> 
> 
> Well, looks like I'm benefitting from this plethora of info 
> on the 'art of reviving fried NSTs' about a decade-and-a-half 
> too late :-) At this point, it still seems like an awful lot 
> of time and effort to save a transformer that's inherently 
> weak and fragile to begin with, but hey, that's just me ;-) 
> Actually, I would recommend the NST or OBIT to the beginning 
> SG coiler, as these relatively small and weak, current 
> limited HV transformers can surely bite when one makes a 
> mistake, but pigs, PTs, or even MOTs are very unforgiving of 
> careless mistakes that lead to a shock and can quickly KILL!
> 
> David Rieben
> 
> Sent from my iPhone
> 
> > On Oct 19, 2013, at 6:42 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'
> >>> 
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