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
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