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Re: WIRE CHART
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To: tesla-at-grendel.objinc-dot-com
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Subject: Re: WIRE CHART
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From: "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz>
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Date: Fri, 29 Mar 1996 07:50:46 +1200
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>Received: from rata.vuw.ac.nz (root-at-rata.vuw.ac.nz [130.195.2.11]) by uucp-1.csn-dot-net (8.6.12/8.6.12) with ESMTP id MAA24440 for <tesla-at-grendel.objinc-dot-com>; Thu, 28 Mar 1996 12:51:18 -0700
RWW wrote ....
> I'd like to jump in here and put in my 2 cents worth. This
> actually costs me about 2.8 cents in my quaint Canadian money. I
> think I understand t he physical geometry of the coil winding
> technique which Brad Alheim is attempting to describe, and I'd like
> to suggest that where it's merit might best be used to advantage,
> that is to say as Brad poin ts out, it has reduced interturn
> capacitance, might be a good way to wind a high performance
> SECONDARY coil! This is where interturn capacitance is really a
> problem to performance.
I think this method of winding has been referred to as a "spider-web".
I have seen a sketch (presumably from a photo) of Tesla sitting beside
a huge winding of this sort. It used to be quite commonly used in
"portable" valve radios as a low-C antenna. I can't remember whether
the one I saw was tuned as the first RF tuned circuit but its low
capacitance would lend it well to being tuned by a standard variable
capacitor.
Malcolm