Re: toroid

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

Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> 


Build it up with body putty (automotive) and add a generous amount of fine
conductive graphite powder to make it conductive.  Then sand it smooth for a
good toroid.  Use at least 20-30% graphite powder.

Dr. Resonance


 >  >
 >  > No adverse effect, but it's clear you haven't tried it.  If the duct
 >  > were a straight cylinder, it may make it smoother, but as a torus
 >  > curved, the foil will not lie straight, and it will be a mess.  Using
 >  > relatively narrow, individual strips of aluminum tape (HVAC aisle of
 >  > Home Depot) is the best bet, although I know of no way to make the
 >  > surface free of corrugation ridges.  Covering the duct with paper
strips
 >  > soaked in water & Elmer's glue prior to aluminum tape is the best
method
 >  > I've tried, but still not perfect.
 >  >