RE: 3 Coil System Was: A photographic tutorial ofPancakeCoilwinding...withmovies...(fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

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Date: Tue, 26 Jun 2007 19:21:00 -0500
From: David Thomson <dwt@xxxxxxxxxxxx>
To: 'Tesla list' <tesla@xxxxxxxxxx>
Subject: RE: 3 Coil System      Was: A photographic tutorial
    ofPancakeCoilwinding...withmovies...(fwd)

Hi Bart,

> >According to the longitudinal wave idea I am developing, it would be 
> >necessary to eliminate inductive coupling to eliminate current.  It is 
> >also necessary to maximize potential by maximizing resonance.
> >  
> What do mean "maximize resonance"? For me (engineer), 
> resonance is a frequency where maximum current is possible. 

Actually, I would be maximizing current in the secondary, which is why I use
a flat spiral coil for the secondary.  However, I want to minimize current
and maximize potential in the third coil.  As I see it, the potential will
be maximized in the third coil when resonance is achieved.

> This occurs when inductive and capacitive reactances are 
> equal and opposite, resulting in zero reactance (ideally) and 
> why resonant rise occurs.

Yes, this is in the primary/secondary system.  The third coil operates
differently.  We can make it an entirely capacitive coil.

> >Will the inductive coupling be the same for a copper tube, as opposed 
> >to a wire wound tube?
> >
> No. The inductance of the tube is much smaller. 

Good, this is what I want.

> >If you would post your method for measuring inductive coupling, either 
> >to this list or to a web page, I would greatly appreciate it.  I want 
> >to do some measurements of my own to get familiar with the coupling 
> >strengths in various situations.
> >
> http://www.pupman.com/listarchives/1997/november/msg00898.html

Excellent, thanks.  Also, thanks to Terry for posting it. 

Dave