Re: Tesla Receiver Coil

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Mark Barlow <barlow_tesla_lst@xxxxxxxxx>


Matt, Ed, and Everyone Else



Thanks for your posts I'm glad to get some discussion on this topic. 
Yes Matt, I have found hundreds of hours of good reading on the list 
about Tesla Receiver Coils, but it's a lot to sieve through. What I 
really would like are some pictures, web links, schematics, 
experimental data, and MEASURMENTS that concern Tesla Receiver Coils 
if anyone has got them.



Ed, I agree with you. At that close proximity my receiver coil is 
certainly coupled to my Tesla Coil through capacitance. As far as 
near field induction goes, if you work it out for a 200 kHz coil, a 
quarter wavelengths distance would extend 1227 feet.

So if I am operating in the region you suggested, I've got 1222 more 
feet to go!



Matt, I am well aware of picking up energy from AM broadcasting 
towers, and the power loss that falls of with the square of distance. 
However, there are other transmission modes were you do not have 
distance square losses, such as surface guided waves for example.



I would love to see some empirical data on this subject, other than 
what Tesla has collected! I'm going to forge on, making improvements 
to my receiver. You keep me posted with some references and I'll keep 
you posted.



Thanks

Mark Barlow



P.S.



Matt, I would love to see the C.O.P.s for your industrial laser 
verses a conventional cigarette lighter evaluation.

Tesla list <tesla@xxxxxxxxxx> wrote:
Original poster: Mddeming@xxxxxxx

In a message dated 10/5/05 1:19:22 A.M. Eastern Daylight Time,
tesla@xxxxxxxxxx writes:
Original poster: Mark Barlow


Hello all,



Just like every Tesla Coiler I love to make the big sparks, but I am
really more interested in broadcasting electrical energy. I have
built a receiver coil with a variable capacitor and tuned it to my
Tesla Coils resonate frequency (about 200kHz). It can light two small
incandescent 14 volt bulbs from 5 to 6 feet away. Is anyone else
working on something like this!?



Thanks

Mark Barlow

Hi Mark,

Almost everyone has done some variation of this at some early
time in their coiling lives. After a while, those who do the math
realize that it's about as efficient as using an industrial laser as
a cigarette lighter. If you check the list archives, you will find
hundreds of hours of reading on so-called wireless energy
transmission. If you are close to an AM broadcasting tower, you can
run a tiny motor off of a crystal radio, but the efficiency really sucks.

Matt D.