Re: Form Material Info!!!

["J. Kooiman" <jkooi-at-wish-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

ABS = Anti Butadiene Styrene

Jeroen Kooiman


----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Saturday, July 15, 2000 7:59 PM
Subject: RE: Form Material Info!!!


> Original poster: "Richard Barton" <richardbarton-at-caving5.freeserve.co.uk>
>
> I believe ABS means-
> Acrylonitrile Butadiene Styrene
> ....... but of course, I could be wrong!
> I have used this stuff for a secondary tube in the past.... it
> seems pretty ideal, but I've only been able to get in it short
> lengths, in white, in a tumble dryer wall venting kit.
> Are there such things as ABS drainpipes? Are those brown-
> coloured drainpipes made of ABS ?
> And perhaps you could tell me- is Polycarbonate, what we
> in the UK call "Perspex" ?
> Richard Barton.
>
>
> -----Original Message-----
> From: Tesla list [mailto:tesla-at-pupman-dot-com]
> Sent: Friday, July 14, 2000 4:52 AM
> To: tesla-at-pupman-dot-com
> Subject: Form Material Info!!!
>
>
> Original poster: "Dan Kunkel" <dankunkel-at-hotmail-dot-com>
>
> Tesla Builders from afar,
>
> I came across this little nuggett of info that was tucked away in the
> archives from 94 or 95. I forgot who the original poster was and i am away
> from my personal computer. This is also a greatly condensed chart, the
> original one contained the dielectric constant at different frequencies,
and
> the breakdown voltage at differing frequencies and listed a whole bunch of
> materials including the RF specs for magnet wire coatings. For the sack of
> time i shall include the dissipation factor for a few common materials.
> This will put to rest any rumors and settle which plastic is best for
Tesla
> Coil operation. While one megahert is well above standard coil operation
you
> can compare it to 50 hertz to get an idea...
>
>        Dissipation Factor (x10^-3)
>
>        50Hz / 1MHz
> LDPE - .15 / .08             <high denstity polyethylene>
> HDPE - .24 / .20             <low density polyethylene>
> PP   - .40 / .50             <polypropylene>
> PVC  -  80 / 120 (yikes!!!)  <polyvinyl chloride>
> PS   - .1-.4 / .05-.4        <polystyrene>
> ABS  - 3-8 / 2-15            <I forgot what it stands for>
> PC   - .70 / 10              <poly carbonate OR lexan)
> PU   - 120 / 70              <polyurethane>
>   (linear)
> PU   - 50 / 50               <polyurethane>
>   (thermoset)
> PU   - 30 / 60               <polyurethane>
>   (thermoplas)
>
> As you can see pvc is about the worst material to use and coating it with
> polyurethane doesn't improve matters much at all. however i think that the
> magnet wire insulation affects dissipation much more than the secondary
form
> material. I don't have their numbers with me but they are all very lossy
> too. Supposedly teflon coated magnet wire is the best but i do not know
the
> RF dissipation values for teflon. but i can tell you that if you ever
manage
> to find any it will be expensive.
>
> Discharge Dan
>
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