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Re: disintegration- iron/ steel cores
Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>
Tesla list wrote:
> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>" <Xyme3-at-aol-dot-com>
> In a message dated 5/22/2002 12:52:34 PM, tesla-at-pupman-dot-com writes:
> << What is 'acoustice wave resonance'?
> How is it used to manipulate charged particles?
> In general the lifetime of charged particles, outside
> a vacuum is measured in fractions (small) of a second. >>
> Acoustic wave resonance referrs to the use of acoustics, transducers, to
> create a sound wave. These waves exert force and act similar to a solid
> object. Recently experiments have been done to move water and other small
> particles with the waves. Produceing resonant waves inside hollow tubes for
> example would keep particles from hitting the sides of the tube. (The water
> particles were transported down tubes)
Indeed. I can't see how this can be used on charged
particles, in a vacuum. Charged particles outside a vacuum
are very short lived.
>>Tesla built some with iron and steel cores.<
> I was not previously aware of this,
cf his book:
Experiments with Alternate Currents of High Potential
and Frequency (or close to that...)
Available in reprint.
> are there advantages to an iron or steel core?
Better magnetic efficiency, at the penalty, as noted, of
losses to eddy currents. I believe Tesla used them
early on, moved away from them later. On Balance, not
clear there are overall benefits.
> Are the cores seprate or connected, in other words, is there a
> core for the primary and a separate one for the secondary?
My recollection is that both were tried.
Much experimenting was done. (and more, since then:
most find air core to be best.) Tesla did not have
access to modern materials (notably ferrites). As
others have pointed out, results with these are mixed,
> One of his later coils looked like it may have had a steel
> shaft for the primary and perhaps a non conductive upper part.
> I am going by old photos, so this may not be entirely
It might be helpful to know exactly which picture
(in a particular book?)?
Caution with the pictures (any pictures) is usually