Re: Conductive paint?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Metlicka Marc by way of Terry Fritz <twftesla-at-uswest-dot-net>" <mystuffs-at-orwell-dot-net>

i've tried spray graphite lube on a couple toploads with pretty good
success? even though the graphite megs out real high resistance in a
half inch distance, the streamers didn't seem all that much shorter,
just many more at once.
i've often wondered if the dc resistance really comes into play with the
topc charge being at such a high frequency? is the charge of the topc
being held on the conductor or in the dielectric? i wondered if the
hf\hv wouldn't just jump across the points of all the fine graphite
particles? the spray graphite never flaked off but i did notice that
once in a while the clear poly spray i put over one, seemed to burn in a
fine point as one streamer would get stuck there, showing a very bright
pinpoint at the base. i never could see a pinhole on it though?
just thinking again,
marc

Tesla list wrote:
> 
> Original poster: "Yurtle Turtle by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <yurtle_t-at-yahoo-dot-com>
> 
> Actually, I have tried this with a 4" x 13" toroid
> made of dry wall compound, and with a basketball,
> using aluminum paint. The results were great, although
> temporary. As you stated, the paint acted like
> thousands of small conductive particles, arcing to
> each other. It looked almost exactly like the plasma
> thingy used behind the regeneration chamber for 7 of 9
> on Star Trek Voyager. The fumes were bad and it
> required repainting after less than 60 seconds. It was
> still really neat, and I plan on videoing it soon. I
> haven't experienced the "explosion" part yet, but am
> eager to see it! I do have a lot of aluminum dust to
> clean up afterwards.
> 
> Adam
> 
> --- Tesla list <tesla-at-pupman-dot-com> wrote:
> > Original poster: "Troy Peterson by way of Terry
> > Fritz <twftesla-at-uswest-dot-net>" <tpeterso-at-home-dot-com>
> >
> >
> > Hi Erik.
> >
> > >What is there to stop persons from taking strange
> > tube type objects, and
> > >painting them with conductive paint instead of
> > messing around with aluminum
> > >tape??
> > >Why?
> >
> >   Well, there is nothing to stop them, but a word or
> > warning. I would not
> > reccomend it for various reasons.
> >
> >   1. That paint is usually a conductive material in
> > a suspension that makes
> > it highly resistive. Essentially you get a topload
> > made of tiny particles
> > of aluminum (or
> > whatever metal it is) that are all arcing to
> > eachother.
> >   2. Powdered metal can be explosive. These paints
> > are usually a powder
> > suspended in some sort of clear paint, an arc will
> > vaporize a single
> > particle and create
> > enough heat to vaporize nearby particles creating an
> > explosion (or at least
> > fire) hazzard.
> >   3. The paint coating is very thin and very light -
> > if none of the above
> > points cause problems you are very likely going to
> > have a problem with the
> > paint chipping and
> > flying off when it is exposed to high voltage and
> > all the small particles
> > start repelling each other. This is kinda like
> > placing styrofoam popcorn on
> > the dome of a Van De
> > Graff Generator - but it can look pretty when you
> > turn it off and there are
> > hundreds of shiny flakes falling out of the air like
> > snow. This also
> > happens when CDs are
> > placed on the topload.
> >
> > I have experienced all three of these effects. I
> > immagine there is probably
> > some better conductive paint out there, but
> > considering the experience of
> > others on the list I
> > would not know what it is. I havn't had anything
> > explode violently, but I
> > have had a plastic donut thing that I painted with
> > aluminum paint burst
> > into flames, it was quite
> > spectacular.
> >
> > Regards
> > -Troy Peterson
> >
> >
> >
> 
> =====
> Adam Minchey
> yurtle_t-at-yahoo-dot-com
> www.geocities-dot-com/yurtle_t/index.htm
> 
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