Re: Copper tube for Primary

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

Original poster: "Steve White by way of Terry Fritz <twftesla-at-qwest-dot-net>" <slwhite-at-zeus.ia-dot-net>

I had no trouble at all taking the tubing right out of the box and laying
down my 36" diameter primary. It took me and my wife about 15 minutes. It
came out perfect. The secret, I think, is having your primary forms properly
machined, measured, and mounted before you start. Remember, the tubing is
already bent in the box. All you have to do is feed it out properly. I am
talking about soft copper refrigeration tubing, not the hard stuff.

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, October 03, 2001 4:01 PM
Subject: Re: Copper tube for Primary


> Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<evp-at-pacbell-dot-net>
>
> Tesla list wrote:
> >
> > Original poster: "Johnson, Jeffrey D -at- PWC by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <jeffrey.d.johnson-at-l-3com-dot-com>
> >
> > I got a 50 ft spool of 3/8" tubing from Home Depot.  It was very
difficult
> > to bend into smooth arcs (my fingers are still numb) but it worked.
> > JJ
>
> I have had very good luck bending tubing from new rolls (not work
> hardened) by first wrapping it around a form which has a somewhat
> smaller (perhaps 3/4) form than the desired coil.  Have to be careful to
> keep the direction of curvature right.  After the stuff is removed from
> the form is will be easy to bend carefully by hand to get a good looking
> coil.  Biggest primary I ever made was 16" of 1/2" aluminum refrigerator
> tubing, but can't now remember what I used for the form.
>
> Ed
>
>
>
>