Re: Dryer duct toroid?

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

Original poster: "Bunny Killer" <bunikllr-at-bellsouth-dot-net> 

Hey All..

other than a professionally made spun toroid...  the best I have come up 
with is the aluminum "dryer" duct/aluminum tape combo but heres the best 
part... dont expand the dryer duct keep it compressed as much as 
possible...   yea  I know  it takes 3 X more tubing to make it but its 
stiffer more dent resistant and after the tape is applied  SMOOTHER...
for smaller Dia. toroids...  pizza pans are fantastic for the center 
support....   large dia. need wood wall panel double coated with aluminum 
tape ( better stuctural bond)  the last toroid I made was 12" X 52" 
compressed aluminum ducting and 3 rolls of aluminum tape...   the ridges 
didnt show up in the tape ( although it took 3 tubes to make it ...ouch 75$ 
worth of tube) but its smooth and alot more dent resistant than expanded 
tube of the same material ((which would have been 1 tube))... didnt I just 
say that?  ; )

I suppose the 2 most expensive things about coiling are the toroid and the 
caps.... if you want high quality...  hmmm  okayyy..   variacs are 
expensive too
:)  hell  its all expensive...   GO FOR IT !!!!!  6.7 billion people in 
this world and only about 1000 of us do T-Coiling    thats only .00067% of 
the world population

we are a rare bunch......

Scot D




Tesla list wrote:

>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
>
>