Re: An Important Post.

To: "'Tesla List'" <tesla-at-poodle.pupman-dot-com>
Subject: Re: An Important Post.
From: Tesla List <tesla-at-stic-dot-net>
Date: Wed, 6 Aug 1997 21:30:20 -0500
Approved: tesla-at-stic-dot-net

From: 	Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: 	Wednesday, August 06, 1997 3:18 PM
To: 	tesla-at-pupman-dot-com
Subject: 	Re: An Important Post.

Hi Richard,
 
> From:   Richard Wayne Wall[SMTP:rwall-at-ix-dot-netcom-dot-com]
> Sent:   Tuesday, August 05, 1997 3:42 PM
> To:     Tesla List
> Subject:    Re: An Important Post.
> 
> Malcolm wrote: 
> 
> snip
> 
> >
> >Apparatus: A seven stage line was built as follows:
> >
> >     1.6mH    800uH    400uH    200uH    100uH    50uH     25uH
> > ----oooo--+--oooo--+--oooo--+--oooo--+--oooo--+--oooo--+--oooo--+---
> > In        |        |        |        |        |        |        | Out
> >          ---      ---      ---      ---      ---      ---      ---
> >          ---      ---      ---      ---      ---      ---      ---
> > Gnd       |        |        |        |        |        |        |
> > ----------+--------+--------+--------+--------+--------+--------+---
> >         10pF      22pF     50pF     100pF    220pF    470pF   1000pF
> >
> >Caps are silvered mica jobs.  The inductors are airwound on bobbins 
> >for the popular FX2239 potcores.
> 
> snip
> 
> Malcolm, 
> 
> Placing matching inductors in the opposite bottom "slots" of the ground 
> line allows a truer representation of a transmission line. 

Actually I have to disagree. The difference between my model and his 
is that his was balanced and mine was unbalanced. A normal TC is 
unbalanced n'est pas? The object was to model the coil, not a 
balanced line.

> The ground 
> line can be entirely eliminated.  This configuration has already been 
> done.  Eric Dollard did this with his "analog computer" representation 
> of a transmission line.

Fine. But that isn't the correct representation of an unbalanced 
line. The Corums never used a balanced line in their model. You run a 
TC with a ground, right?

>  Only Eric used repeating units of the same 
> valued inductors and capacitors.  More like a real wound resonator.  

Unfortunately not. I tried exactly that three days ago and it failed 
to observe the lumped calculations that we use for calculating 
frequency. It was only through introducing component grading that I 
found both sets of rules were obeyed. A _good_ model should follow 
all existing rules shouldn't it?

> Eric measured magnetic and ES components and their effects along the 
> various segments from one end to the other and contrasted them with 
> predicted transmission line values at quarter wave resonance.  There 
> was marked disagreement.  Orthodox transmission line theory assumes 
> transverse propagation of an EM wave.  Eric's model demonstrates 
> longitudnal transmission of an electrical wave.  Longitudnal 
> transmission - a theory near and dear to Nikola Tesla.

I don't recall him saying anything about this in the works I've read. 
Do you have a reference?

Malcolm