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Re: PE sheeting: where to buy?

Original poster: Steve Ward <steve.ward@xxxxxxxxx>

Hey Terry,

I do have a big roll of the 4 mil drop cloth PE (or maybe its PP as
you say?) film stuff.  I think i will make a blanket type thing out of
a whole bunch of layers and try that first.  Not sure i want to fork
out 25 bucks for some insulation material that i probably already have
on hand.  But if i can find the nice thick stuff for much cheaper than
mcmaster i may go that route.  I do think you are right that many many
layers of thin film would be superior, i just need a good way to do

Anyway, many things to do to the magnifier to keep my busy, so im happy!


On 4/30/05, Tesla list <tesla@xxxxxxxxxx> wrote:
> Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
> Hi Steve,
> Go to the paint store.  Get that polypropylene paint cover stuff.  It is
> all folded up.  Just unfold it "a little" till you get a long bunch with a
> zillion layers.  It will stand off tremendous HF voltages!!!  All those
> 4mil-air-4mil-air...  layers have very low capacitance and the standoff is
> "high"!!
> I think Ed W. and Mark R. have played with totally oil immersed things for
> maggies, but I don't think they were happy with them...
> Lots of folks have that 60 mil poly in any case ;-))  Now is their chance
> to get rid of it :o)))
> I think you really want polypropylene, not polyethylene....
> Cheers,
>          Terry
> At 09:54 PM 4/30/2005, you wrote:
> >Hi Guys,
> >
> >Im looking for LDPE sheeting in the 60mil range or higher (it must be
> >able to make a 6.5" radius bend though).  I know a lot of people used
> >this stuff for rolling caps years ago.  Im hoping some of you guys
> >have some sources you could point me towards.  I found some things on
> >mcmaster.  I could get an 1/8"- 24"x48" sheet for about 13 bucks, or 2
> >sheets of 1/16" stuff for about 14 bucks.  Im leaning towards the
> >1/16" stuff so that im sure it will make the bend i need.  This is for
> >stuffing between the primary and secondary of my new magnifier.  Im
> >not sure exactly how much voltage im really holding off here (probably
> >quite a lot) but i definately need something in there to help keep
> >those sparks out.
> >
> >I dont really want to deal with like 100 layers of 4mil stuff, it just
> >gets messy and is hard to keep clean (too much statically charged
> >surface area there!).
> >
> >Also, if anyone has any other ideas for insulation, im open to
> >suggestion.  The secondary is ~13" diameter, im looking for the
> >insulation to be in the 14-15" diameter range, and needs to be about
> >24" tall so that the sparks cant simply race down the side of the
> >plastic (the plastic will extend above the secondary coil itself).
> >
> >Thanks,
> >
> >Steve