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Re: Secondary form, New idea!!



Hey!  Slather it with as much polyurethane as you can!  The thing here is
that it sometimes costs more in insulating sealer coats of poly, epoxy,
fiberglass resin or what have you than it would cost to buy a proper
secondary form of a low loss material.  But hey, you have nothing to lose
if you try!  Except the cost of your wire, time and sealers. Experience
is the best teacher!  Go for it!  I got 5" sparks with a secondary wound
around oat boxes.   Al.

On Sun, 10 Sep 2000 15:22:55 -0600 "Tesla list" <tesla-at-pupman-dot-com>
writes:
> Original poster: "Alex Madsen" <alexmadsen-at-netzero-dot-net> 
> 
> Secondary form
> 
> Hi all
> The 6" pvc I bough for my secondary form I found out was only 
> covered in
> white pvc. The inside  is black PVC. I read here some where that 
> that is
> very bad due to the carbon used to turn it black. Is this true? After
> looking around for a while I fond some 6" cardboard tubing used for 
> poring
> concrete into for footings and such.  It is strong enough to hold 
> its shape
> and support a significant weight + light weight. I as thinking this 
> would be
> perfect for coils. It is less expensive then pvc and come in many 
> diameter
> up to I think 56".  The technical name for this is "sonotube" Here 
> is a web
> sight run by one of the may manufactures of the stuff. There is a
> description as well as info. on  different sizes and pics.
> http://www.sonoco-dot-com/sonotubes.htm There are may there 
> manufacturers. I
> have some form Mercer paper tubing corp. My plan is to cut off the 
> ends
> (which are bent). Dry it well with a heat gun.(to get rid of the 
> absorbed
> H2O which may reduce performance) Give the tube several heave coats 
> of
> polyurethane and  then sand it smooth.( there are little bumps where 
> the
> seams in the sonotube are).  Then I will begin to wrap the tube with 
> wire.
> Will this work well? Cements please !!!!!!
> Here are some pic of the tube i paln to use.
> http://www.geocities-dot-com/alexmadsen/
> Alex Madsen
> PS I think this would be good  for BIG TCs!!
> 
> 
> 
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