Re: Shape of secondary coil...

• To: tesla-at-pupman-dot-com
• Subject: Re: Shape of secondary coil...
• From: "Phillip D. Rembold" <prembold-at-gte-dot-net> (by way of Terry Fritz <terryf-at-verinet-dot-com>)
• Date: Sat, 03 Oct 1998 20:45:09 -0600
• Approved: terryf-at-verinet-dot-com

The key word is 'dramatically' - - - -
I've successfully built small square coils, (both primary and secondary)
but there is a strong tendency for high voltage to dislike making
anything but sweeping turns . . . Check any ARRL handbook.

What this means in real life is you'll get corona discharge out of all the

corners of your secondary. The higher up you go - the stronger the effect.

THIS DOES LOOK COOL for a few minutes - then the turn to turn
insulation starts to break down, you can guess what effect that has . . .

The problems can be compensated for in a smaller unit, and it makes
for a lively display, but for a large coil - I wouldn't do it.

But in answer to your basic question of will it work, - Yes it will, and
if you want to approximate the diameter of the secondary, imagine
the coil you would have if you rounded off all the corners.

Phil
TCBFW


Tesla List wrote:

> Original Poster: "chris morgan" <crmorgan-at-hotmail-dot-com>
>
> Must a secondary coil be circular in cross section?  With larger sizes
> it would probably be easier to build a polygon than a circle.  Would
> this dramaticly affect performance?

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