Re: big coil history

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Jim Lux" <jimlux@xxxxxxxxxxxxx>

Maybe it's the quarter wave transmission line transformer thing?
Could it be Ferranti for spelling? (there's a well known Italian HV company
of that name)

----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Thursday, March 31, 2005 6:19 PM
Subject: Re: big coil history


> Original poster: "Dr. Resonance" <resonance@xxxxxxxxxx>
>
>
>
> The 1/4 lamda myth was strongly advocated and propagated by a number of
> Physics textbooks many of which referred to it as "the Ferrenti
Effect" ---
> must be something Italian.
>
> Dr. Resonance
>
>
>
>  > Take a nice lumped theory Tesla coil model like this:
>  >
>  > http://www.hot-streamer.com/TeslaCoils/MyPapers/modact/Image160.gif
>  >
>  > And try and work through it with pencil and paper ;-))
>  >
>  > Today with computers and MicroSim like programs, "anyone" can do it!!
But
>  > if one tries to do it the hard way (and many many have tried!!), you
just
>  > can't do it....  Much like transmission line theory in 80's, the tools
> were
>  > not there to workout the details....  Today, Antonio has many papers
where
>  > those details "have" been worked to a very high degree!
>  >
>  > Also, today we can measure things with high confidence. In the 30's and
>  > 40's, they just did not have the test tools to "know" what was going
>  > on.  It is always far easier to know what the system is doing with real
>  > measurements and "then" fit the theory ;-))
>  >
>  > In the old days I am sure many worked things and found the terminal
> voltage
>  > of a coil with say 10 foot streamers to be 300kV...  Well, that was
>  > obviously "wrong" !! :o))  10 feet at 10kV/inch is 1,200,000
>  > volts...  Tesla always gave coils super high voltages too...  If the
>  > physics did not agree with Tesla then the physics was obviously wrong
>  > because Tesla certainly was not...  I think a lot of the mess got
started
>  > just that way...
>  >
>  > Of course, we all know who started the 1/4 wavelength of wire idea
;-)))
>  >
>  > http://www.pbs.org/tesla/tt/images/tt_main.jpg
>  >
>  > "Probably through misinterpretation of something Tesla said?"
Actually,
>  > direct and accurate interpretations of what Tesla said...
>  >
>  > If he would have had a good scope, think of how different it would all
be
>  > now!!!!  If anyone gets that time machine working, we gotta send Tesla
a
>  > scope!!!  If Tesla had a scope, maybe we would have time machines now!!
> ;o))
>  >
>  > Cheers,
>  >
>  >          Terry
>  >
>  >
>  > At 01:02 PM 3/31/2005, you wrote:
>  > >"Given that folks in the 30s and 40s were using the lumped LC analysis
>  > >approach (and it had certainly been around before that), it would be
>  > >interesting to see where, when, and why, the 1/4 wavelength of wire
idea
>  > >started to be used."
>  > >
>  > >         Probably through misinterpretation of something Tesla said?
>  > >
>  > >Ed
>  >
>  >
>  >
>
>