Re: [TCML] "Means for increasing the intensity of electricaloscillations" The Tesla Superconductor of 1901

[Gary Lau <glau1024@xxxxxxxxx>]

It might be worthwhile to put on our thinking caps before throwing liquid
nitrogen at our coils, and think about what's important.

Superconduction isn't possible with commonly available materials.  Any
claims made by Mr Tesla should be taken with a grain of salt.  As Dave
pointed out, some reduction in resistance might be achieved with cooling,
but you need to think about the relative impact in efficiency that might be
achieved.  It turns out that the secondary resistance does not have a large
impact in efficiency and performance.  Primary resistance IS very important
and any reduction there would be useful.  But the spark gap resistance is
still going to be the larger loss.

Consider also, the losses incurred through the mains wiring.  If your coil
is pulling 20A+ from the wall, you may find that gertting rid of wimpy
extension cords and beefing up the 120V wiring will have a measurable impact
in performance - an easy win.

Regards, Gary Lau
MA, USA

On Mon, Apr 11, 2011 at 10:02 PM, chris elfert <snotblossom66@xxxxxxxxx>wrote:

> As it seems to be a law of physics that as a conductor's temerature is
> lowered, the the resistance is lowered. The amount depends on the conductor
> material of course, as can be seen in the experiments with superconductors.
> In the scheme of things, copper is not nearly as good a conductor as many
> other materials, so the cooling effect will have to be much greater than
> just what can bew achieved with ice. Even Tesla said he used liquid air,
> which was most likely liquid nitrogen to get the effect he described. Since
> nitrogen doesn't liquify until at least -320 Deg. F, ice isn't even close.
> For a home experiment, I might try starting with dry ice (frozen carbon
> dioxide), which is about -110 Deg. and is easily found. I am sure this
> should be sufficient to produce some significant improvements. For some
> temperature/resistance formulas in different conductors, this link may be
> helpful as an online calculator and explanation.
> http://hyperphysics.phy-astr.gsu.edu/hbase/electric/restmp.html
>
> From: Dr.Hankenstein <dr.hankenstein@xxxxxxxxxxxxx>
> To: 'Tesla Coil Mailing List' <tesla@xxxxxxxxxx>
> Sent: Monday, April 11, 2011 8:35 PM
> Subject: RE: [TCML] "Means for increasing the intensity of
> electricaloscillations" The Tesla Superconductor of 1901
>
> Do it, dude! Fill that tesla coil up with ice and give it a try!
>
> Hank
>
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
> Of Weinhold Shannon L
> Sent: Monday, April 11, 2011 2:57 PM
> To: Tesla Coil Mailing List
> Subject: [TCML] "Means for increasing the intensity of
> electricaloscillations" The Tesla Superconductor of 1901
>
> While browsing through some of Tesla patents, I ran across this one,
> patent number 685,012, in which he describes using artificially cooled
> coils to obtain "a great increase in the intensity and duration of the
> oscillations in a freely vibrating or resonating circuit". He describes
> the utilization of liquid air to obtain these results.
> He describes, as he has in all of his high potential patents, the
> magnification of oscillations, the increase being directly proportionate
> to the product of the frequency of the oscillations and the inductance
> of the secondary coil, and inversely to the resistance in the secondary.
> Other conditions remaining the same, the intensity of the oscillations
> in the resonating secondary will be increased in the same proportion as
> its resistance is reduced. He states that by using this technology, it
> becomes viable to use a longer conductor, securing a much greater self
> inductance, without the extra resistance that would normally be
> encountered by such a change in length.
>
> I'm wondering if anyone has done any experimenting with this phenomenon.
>
> Sounds like it may be a viable way to obtain greater output without an
> increase in input power...always a bonus.
> He doesn't indicate a percentage in efficiency gain. I am curious as to
> how well this works.
> I'm thinking I might have to rig up a primary and a secondary coil, each
> with an outer larger diameter pvc former, and try filling it with some
> sort of freezing fluid to test this out.
> Ideas anyone? Anyone else curious?
>
> Shannon Weinhold
> Klasdja Intelligent Innovations
>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla