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Re: form for secondary

I think it may have something to do with the coloration fillers that are
used in the plastic.  It makes it more prone to carbon tracking.  I think
they may use some petroleum based carbon colorant and that would increase
the risk of carbon tracking.
Similar to 'lamp black' , which is nothing but carbon.  I used a 4" abs
pipe coupling for my multiple fan forced spark gap and it works great so
far, even after a sustained 60 minute run.  I used it because I had it
laying around, and maybe I got lucky, only time will tell. But I would be
leary of spending a lot of time, money, and energy winding a secondary on
this type of pipe.  But if you insist, why not try it.  Remember, the
pipe comes cheap, but the wire, polyurethane or epoxy/fiberglass coatings
and your time do not.  Just my opinion.   Al  

On Tue, 05 Sep 2000 17:17:18 -0600 "Tesla list" <tesla-at-pupman-dot-com>
> Original poster: "marzie" <marzie-at-hotpop-dot-com> 
> i am in the midst of building my 1st coil  and i have been 
> reasearching tc's on
> the web and by numerous web sites i have been advised not to build 
> my secondary
> on grey or black pvc pipe.....is they a reason for this??  
> from marzie