Re: Wire Length (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Gerry Reynolds <greynolds@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Sun, 17 Dec 2006 12:03:25 -0700
From: Gary Peterson <g.peterson@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Wire Length (fwd)

> Well, it makes perfect sense to have the max inductance/max Q
> for a receiver coil.... Once tuned....you get the max power received.
>  Mike

     Yes, with the shortest possible wire length the resistance would be 
minimized, resulting in the highest possible Q for the inductor.
     You mention "power received."  Well, we are still crawling around.  The 
first step is simply to detect the transmitted energy.

"In my first efforts, of course I simply contemplated to disturb effectively 
the earth, sufficiently to operate instruments.  Well, you know you must 
first learn how to walk before you can fly.  As I perfected my apparatus, I 
saw clearly that I can recover, of that energy which goes in all directions, 
a large amount, for the simple reason that in the system I have devised, 
once that current got into the earth it had no chance of escaping, because 
my frequency was low; hence, the electro-magnetic radiation was low.  The 
potential, the electric potential, is like temperature.  We might as well 
call potential electric temperature.  The earth is a vast body.  The 
potential differences in the earth are small, radiation is very small. 
Therefore, if I pass my current into the earth, the energy of the current is 
stored there as electromagnetic momentum of the vibrations and is not 
consumed until I put a receiver at a distance, when it will begin to draw 
the energy and it will go to that point and nowhere else." [Nikola  Tesla on 
His Work With Alternating Currents and Their Application to Wireless 
Telegraphy, Telephony and Transmission of Power : An Extended Interview, 
Leland I. Anderson, Twenty First Century Books, 1992. pp. 130-131.]

I wrote:
>> . . . One of these had an H/D ratio of .45/1, two .47/1
>> and another .55/1. . . .

This should have read ". . . These had H/D ratios of .45/1, .47/1, .53/1 and 
.55/1. . . ."


>>  . . . A high voltage gradiant and possible flashover are not
>> always problems.  In 1898 Tesla adopted a .43/1 H/D ratio
>> in the design of a receiving coil that was used in
>> conjunction with his 8-foot diameter flat spiral transmitter.
>> [Nikola Tesla  Guided Weapons & Computer Technology,
>> Leland I. Anderson, Twenty First Century Books, 1998, p. 12.]
>> Another receiving coil had an H/D ratio of about .31/1.
>> Four other Tesla coil receivers, resembling tables, are known
>> to have existed. [ibid, pp. 16 & 41]  One of these had an H/D
>> ratio of .45/1 [N. T. on His Work With Alternating Currents and
>> Their Application to Wireless Telegraphy, Telephony and
>> Transmission of Power : An Extended Interview, Leland I.
>> Anderson, Twenty First Century Books, 1992. p. 150], two
>> .47/1 and another .55/1.  To this day, .33/1 resonators are
>> being used in conjunction with wireless energy transmission
>> and reception experiments. ["The Wireless Transmission of
>> Electrical Energy," William Wysock, Telluride Tech Festival,
>> Aug. 10-12, 2005.]
>> Gary Peterson