Re: Receiver coil

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "butt head by way of Terry Fritz <twftesla-at-qwest-dot-net>" <mrnobody41-at-hotmail-dot-com>

Ahh yes,I was just reading about this in a book about tesla,and his "lost" 
inventions. lemme grab it....
It says here that for wireless power,you would wind two identical flat coils 
(wide,not tall) with two large metal spheres attached to the large coil. 
(aerials if you will) Much like a tesla coil,but "backwards" you would 
connect the large coil to the "antenna" and to ground,and take power from 
the "primary" (now secondary) of the second coil.  I believe that the 
"aerials" are critical in tuning the circuits. the key is to get the 
"antenna" as high as possible,Like up into the clouds,where the atmosphere 
is conductive when charged with "hundreds,thousands,or even millions of 
volts"
it says that Tesla's prototype (which he demonstrated to the patent-givers) 
was constructed thusly: (transmitter) A 50,000 volt transformer charged a 
.004uF capacitor which discharged through a rotary gap producing 5,000 
breaks per second.The primary was eight feet in diameter,and used one turn 
of "stout" cable.the secondary was 50 turns of 8 gauge cable.the transmitter 
oscillated at 230-250,000 CPS,and produced 2-4 million volts.
He later modified this a bit,and used it at Colorado Springs as teh 
"magnifying coil" the secondary was 24 turns of 8 gauge wire 51 feet in 
diameter,the antenna was a 30 inch sphere,and was on a 142 foot mast!

Something else that might be useful to look into would be resonant tank 
circuits for the reciever. (crucial for this experiment) Things like teh 
tesla radio system would be helpful here.

the book i got this from is called "Tesla,the lost inventions" by George 
Trinkaus,printed here in Portland Oregon. If you like i could scan a few 
articles,and mail them to you.

Good Luck!


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Receiver coil
>Date: Thu, 17 May 2001 18:30:50 -0600
>
>Original poster: "kelek stevenson by way of Terry Fritz 
><twftesla-at-uswest-dot-net>" <kkelekk-at-yahoo-dot-com>
>
>
>To introduce myself:
>
>I have built a 12kva coil with a six foot secondary
>that draws 15 foot arcs.  Now I would like to build a
>receiver coil in the tradition of Tesla's original
>intent of wireless transmission of power.  I am not a
>physicist, nor do I have any conventional education in
>the field of electrical engineering. This makes it
>difficult for me to learn directly from Tesla's
>writings and patents, and so I turn to the internet
>for the information I need.  I understand the broad
>concepts of how a receiver coil works but know very
>little about the specifics of its design.  If there's
>anyone who can share any knowledge on receiver coils,
>first hand or not, I would appreciate it.
>
>Thank you - Kelek
>
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