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RE: Metal traces in PVC pipe?

Original poster: Bert Pool <lightnin_dude@xxxxxxxxxxx>

A number of the members on this list have built solid state induction heaters (Aaron Koscho and Justin Hayes come to mind). It would not be difficult to make a heater coil that can encircle a coil form up to say, six to eight inches in diameter. One would slowly move the pvc pipe down through the induction coil. Any bits of metal or other debris that reacts with the RF field should create tiny local hot spots that would melt or otherwise show themselves. This sure would beat destroying a coil to discover the foreign material embeded in the form.

So, what do the RF induction people think - is this doable? It would cool to be able to bring blank coil form pipe to a 'thon and run it thru such a tester.


At 10:51 PM 7/2/2006 -0600, you wrote:
Original poster: "Garry Freemyer" <garryfre@xxxxxxxxxxx>

Yeah that's a good idea about looking to see if there is any arching to the
metal. Some are smaller than the period in this sentence. I'm not sure such
small bits would cause a noticeable attraction, but one such piece really
fried my biggest one good. At least it might catch the bigger stuff. If
someone had a cheap home made xray machine made from certain tubes, I bet
the metal pieces would sure show up except maybe aluminum. I also was
concerned about the bugs Terry found. If they were alive when they fell into
the plastic, their bodies would carry water, and would likely go up like a
bug in a zapper, taking the coil with it.

I've rewound my coil and its now incased in epoxy. I used the same tube
after digging out the burned holes and filling in with silicone seal on the
premise that if there were any other significant conductive material be it
flies or metal, it would have blasted a hole already.

I'll let ye all know how it turns out.

-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Sunday, July 02, 2006 11:01 AM
To: tesla@xxxxxxxxxx
Subject: Re: Metal traces in PVC pipe?

Original poster: Ed Phillips <evp@xxxxxxxxxxx>

    I've seen some white PVC pipe with crud like this but none where
the outside of the pipe "looked clean".  Seems to me a very simple
inspection method would be to pass a "Tesla coil" leak detector probe
over the pipe or, even simpler yet, just move it around over the top
of a "standard TC" operating at low enough power that streamers don't
work along the pipe to the fingers holding it.