Re: Back to Brass :)

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

Original poster: "Terry Blake by way of Terry Fritz <teslalist-at-qwest-dot-net>" <tb3-at-att-dot-net>

Hi Jeremy,

Here is a very simple primary I made from 100 feet of 1.25" spring-bronze
weatherstrip (0.01" thick) and adhesive-backed 0.25" polyethylene foam.

http://www.tb3-dot-com/tesla/hugecoil/primary/primary.html

I have driven it with up to 7.5 KVA and made 9 floot sparks with it.

http://www.tb3-dot-com/tesla/hugecoil/hugecoil.html

Terry Blake
Coiling in Chicago.
http://www.tb3-dot-com/tesla/tesla.html

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Thursday, May 01, 2003 11:17 PM
Subject: Back to Brass :)


 > Original poster: "Jeremy Scott by way of Terry Fritz
<teslalist-at-qwest-dot-net>" <supertux1-at-yahoo-dot-com>
 >
 > Hi,
 >
 > I just wound my primary with a copper strip roll, and
 > it looks like crap :) It's just too darn malleable,
 > like trying to wind it with tinfoil Christmas ribbon.
 > :)
 >
 > It bends when I try and push it into place or pick it
 > up. I believe this would be a problem no matter how
 > thick, it tends to kink up because it has no
 > torsional (did i spell that right?) strength.
 >
 > I picked up a few 12 inch brass strips of the same
 > thickness of my copper (.016) and test fitted them
 > into the comb supports and it appears to maintain
 > it's curved circular shape due to the extra strength.
 >
 > So now I'm going to use brass (70% copper / 30% zinc)
 > for the primary, then I'll use the big roll of copper
 > I have left for all the coil interconnections.
 > I intend to use three separate strips totalling about
 > .048" thick by 2" wide. That should be able to
 > handle quite a bit of RF power. Perhaps I'll make
 > the middle strip copper.
 >
 >