Re: Tesla Coil RF Transmitter

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Dan" <DUllfig@xxxxxxxxxxxxx>

Ed:

Tesla said that he measured standing waves set up by lightning 
discharges. He said he could also set up standing waves with his 
transmitter. Standing waves can only occur if the reflected wave 
coming back at you is substantially of the same intensity as the 
transmitted wave. This is of fundamental importance, because if the 
waves are the same strength coming back as going out, Tesla was right 
when he said that the earth has negligible attenuation.

So the big question is: Was Tesla right? did he in fact measure 
standing waves, or was it another phenomena? If he was right, and you 
can indeed set up standing waves, it would mean that the energy does 
not dissipate as you say. Otherwise it does.

This question will not be settled until someone tries to duplicate 
Tesla's experiments, and find out one way or the other.

Dan

----- Original Message -----
From: <mailto:tesla@xxxxxxxxxx>Tesla list
To: <mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx
Sent: Monday, September 12, 2005 6:50 PM
Subject: Re: Tesla Coil RF Transmitter

Original poster: "Chuck Hobson" 
<<mailto:g0mdk@xxxxxxxxxxxxx>g0mdk@xxxxxxxxxxxxx>


----- Original Message ----- From: "Tesla list" 
<<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
To: <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
Sent: Saturday, September 10, 2005 6:57 PM
Subject: Re: Tesla Coil RF Transmitter


>Original poster: Ed Phillips <<mailto:evp@xxxxxxxxxxx>evp@xxxxxxxxxxx>
>
>"end of a tesla coil? answer: the ground plate! Tesla was transmitting
>energy by pumping a charge into the ground itself. As a matter of
>fact, if you read his later writings, he was trying to keep RF losses
>to a minimum. He would usually say that his coils dissipated about
>10% energy in RF, and 90% energy through the ground.
>
>Your assertion that if you put a 1230 foot antenna on the thing, it
>will transmit, is half right. The coil, all by itself, without an
>antenna, will transmit if it is properly grounded.
>
>Dan"

That's true  about a properly grounded Tesla Coil Dan, but the
Effective Radiated Power (ERP) would still be miniscule, probably
undetectable (electromagnetic waves) beyond about 500 to 1000m
distance I would think. It would be interesting to know if anyone has
tried detecting Tesla Coil signals with a good communications receiver.

Chuck

>We all know what he said, but that doesn't mean it's true; in this case
>it can't be.  This is one topic where he clearly bent his pick and went
>off into the wild blue yonder.  Remember that at the time he was writing
>this he was stating with certainty that "Hertzian waves are dead and
>will soon disappear from the scene."  They still are king over 100 years
>later, and for a good reason.
>
>If current flows into the ground an equal amoung MUST flow through
>whatever you call the thing on top of the coil.  There is no way his
>configuration could have behaved other than as a transmitter with a
>short top-loaded antenna.  The circuit is clearly shown over and over
>again in his patents.  I'll agree that the radiated power would have
>been low because it's a lousy design for transmitting but that's all it
>could do.
>
>Sorry,
>
>Ed
>
>And the controversy goes on!