Re: [] conical secondary (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

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Date: Sun, 17 Jun 2007 14:37:42 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: [] conical secondary (fwd)

Hi Dave,

When I was referring to the inverse conical coil as a replacement for 
the helical, I decided to try a model. Unfortunately to do that I must 
have the capability of modeling an inverse conical topload object (the 
way I do it). But, I can't do that. I just can't do cones in the topload 
area unless I take a series of rings (or cylinders) and offset each ring 
to build a cone. That would take too many objects to do it justice (and 
would take probably an hour to run it since additional toploads really 
load down the program speed). So, I stopped since this was purely academic.

But, before I stopped, I wanted to show you visually what I was 
thinking. Something like this:
http://www.classictesla.com/temp/DaveThomson-3.gif

The inv cone starts out at the bottom as the same diameter of your 
helical and graduates linearly to a 14" diameter. I put a 4" toroid on 
top to keep the same radius of curvature as your sphere for breakout and 
to prevent top cone breakout. As I changed these dimensions, I could get 
the frequency way down near 50kHz easy and high as well. Just a matter 
of the L3 geometry always keeping the toroid dimensions to fit the top 
of the cone. It's certainly possible to do it and could be built for an 
Fres=LC1=LC2=LC3 system. It would take some major work to get it right 
on paper (before building), but it's possible.

Just playing with the concept.
Take care,
Bart