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Re: Copper Banding?

Original poster: Karl Lindheimer <karl@xxxxxxxxxxxxxxx>

Hi Terry B.,

I found you photos interesting, and you have given me an incentive to perhaps one day wind a "banded" primary. One thing though. You spaced the flat bands apart using sticky tape, or foam weatherstripping? Did you ever have any problems with flashover between bands? I would imagine that if the foam ever became carbonized due to a streamer hit, or inter-turn arcing that your primary would be ruined, and need to be re-wound. How has it held up so far?

Curious,

Karl

On Feb 24, 2005, at 9:39 AM, Tesla list wrote:

Original poster: "Terry Blake" <tb3@xxxxxxx>

Hi Tyler,

I'm not sure about copper banding, but I have used a spring-bronze
weatherstrip and a 0.25" thick polyethylene foam strip (sticky on 1 side) to
make a few primaries.  The spring-bronze weatherstrip is 1.25" wide and
about 0.01" thick.  It is the same stuff used to seal around doors.  I like
it better than copper, because it does not kink, and is very springy.

Here is a link to my HUGE Tesla coil that used such a primary for up to
7.5KVA.  It put out 9 foot streamers.
http://www.tb3.com/tesla/hugecoil/primary/primary.html

Here is a link to a smaller primary and shows how I was able to construct it
by myself in 30 minutes.
http://www.tb3.com/tesla/oil/mini/primary.html

<<SNIP>> 

Enjoy.

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