RE: Low Impedance Negative Resistance Tesla Coils

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Ralph Zekelman" <gridleak@xxxxxxxxxxxxxx>

Yes, it has been tried and it works. I did it back in high school
physics using a
5 Hz tunable LC circuit. The teacher got a flask of liquid nitrogen. We
used a
Heathkit O-scope and sig gen to graph the response curves at room
temperature
and with the LC circuit in the nitrogen.

It would be hard to see how to do this with anything but the smallest
TC.

Ralph



-----Original Message-----
From: Tesla list [mailto:tesla@xxxxxxxxxx]
Sent: Monday, January 31, 2005 1:28 PM
To: tesla@xxxxxxxxxx
Subject: Re: Low Impedance Negative Resistance Tesla Coils

Original poster: "Harold Weiss" <hweiss@xxxxxxxxxx>

Hi Ken,

It would work to an extent, but too much magnetic field and you lose
your
superconductivity.  Tesla did some work on this, but it was lost in the
fire.  I don't think anyone has tried since.

David E Weiss

>Original poster: "Ken Jenkins" <thecompman@xxxxxxxxxxxx>
>
>Just a Thought..
>What if you used super conductive wire to build your Primary &
Secondary
>coils, Solenoid wound secondary close coupled. Then put the whole thing
in
>Liquid helium or nitrogen...
>Wouldn't this give you a coil with virtually no resistance??
>Like I said
>Just a thought..
>Ken J.
>
>-----Original Message-----
>From: Tesla list [mailto:tesla@xxxxxxxxxx]
>Sent: Sunday, January 30, 2005 3:01 PM
>To: tesla@xxxxxxxxxx
>Subject: Re: Low Impedance Negative Resistance Tesla Coils
>
>
>Original poster: "Malcolm Watts" <m.j.watts@xxxxxxxxxxxx>
>
>On 28 Jan 2005, at 11:51, Tesla list wrote:
>
>  > Original poster: stork <stork@xxxxxxxxxxxxxxxxxxx>
>  >
>  > I have often been struck by the theoretical implications of
negative
>  > resistance in regenerative antennae and have wondered about their
>  > application to TCs.  It would be attractive to design a TC coil
where
>  > DC resistance is eliminated and 100% of input power  is devoted to
>  > output reactive power only.  Apparently this concept was not lost
on
>  > Tesla as he wrote about it over a year ahead of Armstring and his
>  > early regenerative oscillators.  Further thought suggests easy
>  > application to CW tube TCs and even solid state TCs which have
caught
>  > our fancy and seem to be the rage of Tesla coiling currently.  And,
>  > rightly so.
>  >
>  > http://www.tfcbooks.com/articles/tws5.htm
>  >
>  > stork
>
>Regeneration requires the use of a power supply to overcome the real
>loss so in terms of power spent you actually only gain a further
>inefficiency. This is quite different to increasing the collecting
>power of an antenna.
>
>Malcolm
>
>