Re: foil-covered inner-tubes for large toroids?

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

Original poster: DRIEBEN-at-midsouth.rr-dot-com 

Hi Scot,

How stiff is the 12" or 16" duct from McMaster-Carr? If it's
as soft and easy to dent as the standard 4"-8" stuff from Home
Depot or Lowes, I don't think that it would be durable enough.
One drop or bump and it's pretty much ruined. If MM-Carr's is
stiff enough, then that would be an excellent idea ;^)

David Rieben

----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
Date: Wednesday, October 27, 2004 9:05 am
Subject: Re: foil-covered inner-tubes for large toroids?

 > Original poster: "Bunny Killer" <bunikllr-at-bellsouth-dot-net>
 >
 > YUCK    inner tubes suck   go to McMaster Carr and get the
 > aluminum duct
 > pipe ( the same as the 4" stuff at Home Depot) 10 -16" dia   yes
 > its
 > expensive  but GAWD it makes a decient toroid ( just a tad less
 > pretty than
 > a 1000$+++ spun unit for about 75$)  I made mine from 3 sections
 > of 16"
 > tubing at 25 bucks per section ( 75$ + tape   ummm 4 rolls)
 > total expenditures  100$     ....  beats 1000+$
 >
 > the 12" at 3 sections should run about 20$ per section...   60$
 > pluss
 > tape...   80$ ? or so..
 >
 > Scot D
 >
 >
 >
 >
 >