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Re: [TCML] phillips question about wax and more
The transformer worked perfectly when I got it. Both coils were fine.
I depotted it purely to modify it. One of the secondaries failed
after depotting it. I had accidentally knocked the grounding cable
off the transformer box, and I didn't notice this when I ran my TC. I
guess that's when one of the secondaries went open on me. No worries
though. I had a spare coil from the 15/60 and I just put that on, and
it works pretty well. I just spent two hours making sure the coils
are on the core tightly, and that they're properly grounded. I'm able
to draw a power arc between the terminals and I haven't observed any
internal arcing. Hopefully it will work just as well with my TC.
On Mon, Jun 9, 2008 at 10:24 PM, <Sfxneon@xxxxxxx> wrote:
> That's one reason very old transformers are more likely to fail. The
> shrinking asphalt can leave voids or damage the fragile secondary windings. If your
> transformer with the different smell had an internal short, it might add a
> burned smell to the asphalt, or it may smell different because a lot of the
> volatile compounds may have evaporated or dried out.
>
> Tony G
>
>
> Interesting. The last transformer I depotted was built in 1982 which
> would explain the cracks in the potting material, and why it was so
> stubborn about coming out. I'm still not sure why the old transformer
> had a completely different smell than the newer one.
>
> On Mon, Jun 9, 2008 at 10:15 AM, <Sfxneon@xxxxxxx> wrote:
>> Tar is never used. The black stuff in NSTs is actually a mixture of asphalt
>> and silica flower, which makes it a stiffer consistency. Once it's potted,
>> they don't want it to liquefy too easily and run out of the case. Also, it
>> slowly dries out with age and becomes harder to remelt.
>>
>> Tony G
>
>
>
>
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