Re: Toroid construction

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

Original poster: "Mark W. Stolz by way of Terry Fritz <twftesla-at-qwest-dot-net>" <mark_w_stolz-at-hotmail-dot-com>

Hi Ed,

My latest coil uses a piece of 7" semi-rigid around two 8" cake pans.
http://users2.ev1-dot-net/~nmyreality/tesla/4inch/4inch.html

I used a couple dabs of hot glue and then if needed a piece of aluminium 
tape on the seam for smoothness.

Mark Stolz
Houston, TX


>Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" 
><Esondrmn-at-aol-dot-com>
>
>I could use some advise from those of you who have made toroids using
>semi-rigid flexible aluminum ducting.  I have two 9" metal pie pans that I
>plan to use back to back, then wrap the ducting around the outside.  When I
>made some larger toroids for the big coil using corrugated plastic pipe, I
>wrapped it around an acrylic center form and cut the ends to join smoothly
>then used nylon lacing cord to tie the ends together.  How do you join the
>ends of the aluminum ducting?  Use aluminum tape?  I planned to use 
>aluminum
>tape to attach the ducting to the pie plates.  I will drill a 1/4" hole in
>the center of the pie plates for mounting on the coil.  Do you also maybe
>rivet the plates together?  Do you stretch the ducting out to its full 
>length
>then cut the ends to fit?  Or, compress it back together, evenly, until it 
>is
>just the right length?
>
>Thanks for the help, Ed Sonderman