Re: wireless transmitter (fwd)

---------- Forwarded message ----------
Date: Fri, 19 Dec 1997 13:37:32 EST
From: Esondrmn <Esondrmn-at-aol-dot-com>
To: tesla-at-pupman-dot-com
Subject: Re: wireless transmitter (fwd)

In a message dated 97-12-18 23:56:57 EST, you write:

<< Fellow Coilers,
 >  I am very interested in building a small wireless power transmitter.
 >Has anyone on the list ever tried to construct one? Can a classic coil
 >be converted into one? I am interested in any good sources of
 >information or anything that could help.
 >  I am considering building this for my senior project here at college.
 >I want my senior project to have something to do with Tesla, and I
 >probably cant use a TC because it has to have a uprocessor and be
 >practical and useful for something. I don't know how practical a power
 >transmitter is, I don't think that much has been done in this since the
 >days of Tesla. Even if one couldn't build one to be efficient, I would
 >still be interested, as long as I could build it to be at least 20%
 >efficient. Power transmission needn't be more than 50' or so.
 >  Ideas/suggestions? Or just scrap the whole idea? I would be very
 >interested if anyone had some firsthand knowledge about such things.
 >Tristan Stewart
 > >>

I know for a fact that Richard Quick has done this.  If I remember his
experiment, he used a classic spark gap excited Tesla coil with the secondary
grounded.  The toroid on top was enlarged to a point where it would not break
out - no sparks.  This will cause the coil to increase it's RF output and will
cause interference problems with nearby electronic equipment.  He then used
another secondary coil, tuned to the same frequency as the operating coil.
This second coil was placed some distance ( a hundred feet or so if I remember
correctly) away and the bottom was grounded - to a metal culvert I believe.
When the coil was powered up, the reciever coil produced sparks about as large
as the transmitter coil did originally.

Ed Sonderman