Thought I would post this up as it seemed appropriate as I am road testing the Spotfire IC from Oliver ( Bigman) at this very moment.
https://www.stereophile.com/content/...agnetic-cables
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Thought I would post this up as it seemed appropriate as I am road testing the Spotfire IC from Oliver ( Bigman) at this very moment.
https://www.stereophile.com/content/...agnetic-cables
Unfortunately, I believe the company is no longer in existence. The part about simple nickel plated RCA plugs is interesting, as some cable designers are doing just that...Shindo for instance use Switchcraft RCA for their IC. IMO the Switchcrafts are very good, I use them currently as they were really inexpensive compared to WBT or Audioquest plugs.
Likewise, in another thread, Belling Lee bananas, BFA or Pomonas are preferred over expensive banana plugs
I've never read such tosh in all my life. Here appears to be the premise for the development of the cable:
'...is that if the wire is thin enough—less than several skin depths—some of the signal can sink entirely through the center of the wire and come out the other side.'
What? Sink through and come out the others side?
To my knowledge the skin effect is due to opposing eddy currents induced by the changing magnetic field. Is this magnetic field somehow not present on one side of the cable?
In the spirit of open-mindedness I invite anyone to explain how this works.
Other tosh from later in the article:
'Because the audio signal propagates outside the conductor, by necessity it must propagate through the cable insulation.'
Propagation through insulation? INSULATION :mental: Utter crap.
I didn't get that far - I saw where the link led, sighed, and shut the page down.Quote:
Originally Posted by Firebottle
It's interesting in a kind of "I don't believe what science says" way.
Quote:
Originally Posted by Firebottle
Likewise. Cutting edge bollocks of the very highest order. :)
I think the guy is confusing propagation of electromagnetic field, which is indeed located outside the wires, with actual movement of charged particlesQuote:
Originally Posted by Firebottle
I also suspect that may be so.Quote:
Originally Posted by Shovel_Knight
Quote:
Originally Posted by maxrob200
"First Published: Feb 1, 1991" No wonder.
Despite the author having worked as a physicist at Los Alamos, he has a lop-side understanding of current flow in a conductor. In a conductor of circular cross section, the current density will, because of the skin effect for alternating currents, decrease towards the centre axis of the conductor, but because the geometry is symmetrical, the current will certainly not propagate across the diameter "and come out the other side".
The author cites an example of 1mm diameter copper wire. If he had done the sums he would have found for a high frequency audio signal of 10kHz, the current density at the centre is 96.9% of the value at the surface. And at 10kHz the skin depth in copper is 0.66mm, so the 1mm diameter wire has a radius that is 75% of the skin depth, and thus is electrically 'narrow'; exactly the situation needed - the phase lag for current within the conductor is small. In attempting to reduce the skin depth by introducing magnetic material having a permeability very much greater than one, the phase lag of the current within the wire will be increased.
The author also confuses the velocity of the current-carrying electrons with that of the signal propagation velocity! And claims silk is a better insulator as it has a lower permittivity than most polmymers. It has a permittivity of 2.5 -3.5; comparable to most other polymers (PTFE for example has a value of 2.1). Cotton though does have a low permittivity of 1.3 -1.4, so it could be argued that it might make a better insulator for cables.