Re: strap primaries

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

Original poster: "Kevin Ottalini by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ottalini-at-mindspring-dot-com>

Greg:
        I use flat copper strap (flashing actually) on my very small to
medium
(10 watt to 4kw) range coils and don't see any problems and a few
additional advantages like much easier to handle and closer stepping.

Greg Leyh and Bill Wysock both use flat strip primaries with great
success on medium to very large coils.

I suspect that copper tubing is just much more plentiful (A/C and water
hookup) not necessarily a preferred choice.

Look in here for pictures of both my 5/8" and new 2" primaries:
http://www.mindspring-dot-com/~ottalini/DC%20Driven%20Tesla%20Coil.htm

I wouldn't say I run much over 20KV, but I suspect Greg Leyh's big TC
runs a bit more.

Here are a couple of pics of Greg Leyh's primary:
http://www.mindspring-dot-com/~ottalini/tc/GregLeyh/gl_coil1b.jpg
http://www.mindspring-dot-com/~ottalini/tc/GregLeyh/gl_pri1.jpg

Best,
        Kevin

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, March 01, 2002 7:08 AM
Subject: strap primaries


> Original poster: "Mr Gregory Peters by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <s371034-at-student.uq.edu.au>
>
> Hey guys, A question about primaries.
>
> I once read that copper strap has better RF conductive properties than
> copper tube, but we use tube in tesla primaries to suppress corona
> loss. My question is why? If you have, say, a peak primary voltage of
> 40kV and a 10 turn primary, don't you technically only have 4kV/turn?
> Isn't 4kV too low a voltage for corona discharge to really be a
> problem? I would rather use strap as it is much easier to bend then
> tube.
>
> Cheers,
>
> Greg Peters
> Department of Earth Sciences,
> University of Queensland, Australia
> Phone: 0402 841 677
> http://www.geocities-dot-com/gregjpeters
>