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Re: Toroid Material
In a message dated 99-04-23 06:26:35 EDT, you write:
<< Original Poster: "Andy Cleary" <gemware2-at-dreamscape-dot-com> 
 
 >	I was wondering if it is a good practice to use flexible aluminum duct
> plain as a torus without coating it with the shiny metal flue tape?  I had
> never seen it encouraged, but I found the flue tape to be too expensive for
> my budget.  I have noticed that most often the torus should be smooth, and
> if that be the case then I'm sure the plain duct would be right out.  Thank
> you for any comments,
 
> -Andy >>
Andy, 
There's no need to cover the ducting with tape.  My 12kV, 30ma NST
coil that gives 42" sparks just uses an uncovered ducting toroid.
John Freau