Re: [TCML] Transformer Dielectric

["Phillip Slawinski" <pslawinski@xxxxxxxxx>]

My main concern is heat

On Sun, Jun 8, 2008 at 4:28 PM, Lau, Gary <Gary.Lau@xxxxxx> wrote:
> Why is it that one must drop the NST into oil to measure the modified current of a deshunted NST?  Makes no sense.
>
> As far as requiring vacuum impregnation equipment - I don't see that immersing the NST in transformer oil is any different than immersing it in melted wax.  Both are very low viscosity and would do a reasonable (albeit imperfect) job at displacing air.  I'm unaware of anyone on this List using vacuum impregnation for anything but rolled caps.  I would agree that if the option exists, vacuum impregnation would be a good thing to do, but very few have the equipment to do that.  I find it hard to believe that one can expect a failure in short order if it isn't done.  I repotted my NST at least 3 years ago in melted Vaseline jelly without pulling a vacuum and it's still doing well.
>
> And why not a metal tank?  I repotted my NST in its original metal case.  Granted, one must take into account the issues of leaking, but by using melted Vaseline, that issue went away.
>
> Regards, Gary Lau
> MA, USA
>
>
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of DC Cox
> Sent: Sunday, June 08, 2008 3:30 PM
> To: Tesla Coil Mailing List
> Subject: Re: [TCML] Transformer Dielectric
>
> As you remove shunts, you must drop it into oil for new current output
> testing.
>
> A plastic Wal-Mart tub works fine.  Fill with xmfr oil.  Keep dropping it
> back into the oil for testing as you keep removing shunts.
>
> Forget the wax.  Without vacuum impregnation equipment it's very hard to
> do.  Just pouring wax into a tank will not insure you are properly
> impregnating the windings.  It will fail in short order if you have any air
> bubbles in it as it hardens.
>
> I would avoid a metal tank, and definitely use oil not wax.
>
> Dr. Resonance
>
>
>
>
> On Sat, Jun 7, 2008 at 3:39 PM, Phillip Slawinski <pslawinski@xxxxxxxxx>
> wrote:
>
>> If I'm going to be removing shunts from my transformer is it better to
>> put it under oil, or could I put it in wax?  I'm putting it in the
>> sealed metal box it came in.
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