Re: form for secondary

[Terry Fritz <twftesla-at-uswest-dot-net>]

Hi Marzie,

        Gray and black colored plastics often contain carbon black or other
materials that can conduct electricity especially at high voltage.  One sure
test is to rub an edge firmly on a piece of paper.  If it leaves a black streak
it probably is loaded with carbon.  Blace materials made for outdoor use in the
sun almost always have carbon.  The white PVC is fine.

Cheers,

        Terry


At 09:32 PM 9/5/00 +0100, you wrote: 
>
> 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