Re: primary design

• To: tesla-at-pupman-dot-com
• Subject: Re: primary design
• From: "Ruud de Graaf" <rdegraaf-at-daxis.nl> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Thu, 30 Mar 2000 18:32:35 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

>Original Poster: "Tom Stathes" <newphreak_16-at-yahoo-dot-com>
>
>
>Ok, heres the scoop everyone.  For some reason i can never seem to make a
>decent primary coil.
>
>My powersupply is 10kv at ~130ma
>
>the tank cap is .033uf
>
>my secondary is 902 turns of #24 wire on a 4.5 in OD PCV pipe
>
>i have a static (3 gap) unquenched spark gap
>
>Does anyone have any suggestions on how to go about building a primary coil
for
>these specs.
>
>I have onky used the standard vertical primary in the past, i was thinking
>about going with a saucer or flat primary.
>
>Any help would be greatly appreciated.
>
>--Tom
>
Snip...

Well Tom, I'am afraid you maybe mistyped your URL, because it didn't worked
out.

But anyway, what is for you a decent coil? It looks to me that the primary
goal is to get resonance. Did you? If not, this maybe an idea. Take whatever
flexible isolated wire of about 10 meter (33 feet) lenght. The thicker the
better. Because it is isolated you can let the windings touch eachother and
therefore it is easy to handle. When you must tune you can wind another turn
or unwind (or every part of a complete turn!) If your done with the
experimenting you could make a more rigid primary of Cu tubing (leaving room
for some tuning still stays necessary though).

The Dutch MotMan

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