Re: Dryer duct toroid?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Ed Phillips" <evp-at-pacbell-dot-net> 

"Many of us use dryer duct for toroids, but not plastic. We use metal,
The
plastic ducting will serve to wrap aluminum tape sround as a form to
hold
the metal tape.
     Robert   H"

	I've had good luck with wrapping the duct with several layers of cheap
masking tape before applying the aluminum tape.  Advantage is a lot more
stiffness and the masking tape also smooths out the surface.

Ed