Re: Tesla Coil RF Transmitter

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: robert heidlebaugh <rheidlebaugh@xxxxxxxxxxxxxx>

To sceptics. in 1938 a radio transmitter KHELEN in honolulu hawaii was
opperated to transmit signals to the mainland by the US army. This
transmitter was disigned by Nicoli Tesla him self so the idea that tesla
didn't transmit is faulse
  Robert   H
--


> From: "Tesla list" <tesla@xxxxxxxxxx>
> Date: Sun, 11 Sep 2005 13:09:22 -0600
> To: tesla@xxxxxxxxxx
> Subject: Re: Tesla Coil RF Transmitter
> Resent-From: tesla@xxxxxxxxxx
> Resent-Date: Sun, 11 Sep 2005 13:09:39 -0600 (MDT)
>
> Original poster: "Dan" <DUllfig@xxxxxxxxxxxxx>
>
> Hi all, this response isn't directed at any one in particular; I just
> have a few observations:
>
> 1 -- the earth is conductive, or we would not be grounding equipment in it;
> 2 -- RF can be conducted thru a conductor, or coax would not exist.
>
> and finally,
>
> 3 -- given the above statements, why is it so hard for anyone to
> believe that Tesla was transmitting by conduction through the earth,
> and not propagation through the air?! Just becuase you CAN transmit
> RF through the air, doesn't mean it is the ONLY way to do it.
>
> When tesla was working in Colorado Springs, he worked out two ways of
> detecting high frequency currents. He had a very sensitive receiver,
> which seems to have been a precursor to the regenerative radio
> receiver. Then he was also able to receive substantial currents
> (enough to light light bulbs) using a second Tesla coil tuned to the
> transmitted frequency. Why would he need two different methods of
> receiving (one really sensetive, and one brute force) if he was not
> transmitting in two different ways?
>
> And Sam, you said the TC transmits poorly; considering that Tesla was
> lighting up light bulbs with his receivers, seems his coils were
> transmitting just fine...
>
> Some of his earlier experiments involved running a loop of cable
> around his laboratory. He would run RF through it, and light up
> special bulbs anywhere in his lab. He was constantly running
> experiments, probably hundreds of them by the time he was through. If
> his transmitters acutally needed an Aerial, don't you think he would
> have figured that out? why would he drop the earlier aerial (say that
> really quick three times :) in favor of a capacitive top load, if it
> performed worse? It's not like he never tried an antenna!
>
> Dan
>
> ----- Original Message -----
> From: <mailto:tesla@xxxxxxxxxx>Tesla list
> To: <mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx
> Sent: Saturday, September 10, 2005 10:58 AM
> Subject: RE: Tesla Coil RF Transmitter
>
> Original poster: d a <<mailto:btoc3000@xxxxxxxxxxxx>btoc3000@xxxxxxxxxxxx>
>
> So the whole secondary (topload + secondary coil + RF ground) is the
> short aerial?
>
> Also, what exactly is a RF ground? I notice that if I do not provide
> an RF ground, my sparks are few cm only. When I provide a good RF
> ground, the output of the sparks will be much better.
>
> Regards
> Sam
>
> Tesla list <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx> wrote:
> Original poster: "Derek Woodroffe"
>
> Sam,
>
> A TC is an RF transmitter as you have a large amount of RF power pushed into
> a short ariel (secondary) so it will radiate as a transmitter will, although
> poorly. (two lines, but not very descriptive)...
>
> You cannot go into much detail about a Tc in under ten lines..
> especially to go through the whole load of electrical & RF theory
> never mind the rest of the physics and math.
>
> I had a go at describing a TC in as simpler way as possible my
> attempt is at
> 
<http://www.roffesoft.co.uk/tesla/tccct/tccct.htm>http://www.roffesoft.co.uk/t
> esla/tccct/tccct.htm
> It does of
> course only briefly describe a static gap tesla coil, but in 10 pictures or
> so, that's not too bad.
>
> Hope it helps..
>
> Sorry, but there is no real alternative to reading up on your
> subject, or subjects in the case of TC's
>
> Best way is do it, ask 'n' learn....
>
> Derek
>
>
>
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