Silver plated copper


Please explain to me the theoretical basis of using silver plated copper in cables. Seems counter intuitive to me. Signal would have two paths with different conductivity which would cause distortion.
crwindy
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As a long time coin enthusiast, I can say without doubt that copper oxidizes much quicker and to a greater degree than silver. Coin grading services even designate pristine examples of uncirculated pennies as a mint state condition with the additional designation of "RD" which means red. A penny so designated will command a price several times higher than one designated "BN" which means brown. On the other hand, bags of uncirculated silver dollars (90% silver, 10% copper, minted from 1878 to 1934) that have sat in bags of one thousand coins in bank vaults and never seen circulation will still have the original mint luster just like the day they were made, even over a century later. In fact, any oxidation that does occur on those dollars many times results in a multi colored rainbow sort of hue, and those coins command a premium over the mint luster shiny ones. Ironic that oxidation on silver coins commands a premium price while oxidation on copper coins degrades the value.
The distortion in an ac waveform as propagated through or via a ’transmission line’, will occur in the DC to AC & AC to DC changes in that given signal.

the bulk skin effect consideration, the real actual skin effect, is not the transmission line addendum formula that all are familiar with (in engineering)..

this real skin effect itself, it transits from being in the core of the conductive bulk (very large bulk conductor--not wire, but a giant block)..and towards the surface, at approximately 400hz.

This means that any approximation of DC that is below 400 hz, will attempt to move and actually move toward the center of the conductor.

All of human hearing is tied to listening to transients. We do not hear the other ~90% of the signal.

Keep this in mind for a second.

Look at the complex sine wave of a music signal as expressed in electrical terms, in conjunction with a transmission line.

Where exactly, does this sinewave have a delta, or rate of change that is at zero? Ie, DC?

There is only one place it does this.

At the peak of the transient. The moment of peak transient is the moment of DC.

At zero signal level, and electrical signal flip (in traditional views), that is occurring at the highest delta, or rate of change - the exact opposite of the DC occurring at peak at the transient. The transition ( ac to dc to ac--at the peak) is not instantaneous and no we don’t get to ignore that short DC moment. It’s key, here.

At the greatest rate of power and signal integration of the signal and wire, that is the point where the signal attempts to retreat to the core, and flip. The time is short, though, so hard reflections and complex distortion generation is the result. The hint of this sticks out in complex LCR phase diagrams, but does not express it directly. That phase diagram is a application aspect, and is engineering oriented for wire and whatnot....it is not truly tied to the fundamental theories that underpin the scenario. In this case the underlying theoretical aspect becomes important. It's the only way to bridge the hearing vs measurements problem.

The bulk of the noise and distortion of a sine signal, a complex wide-band sine signal such as music, occurs in the peak transient domain and pretty well no where else, and the ear is only listening to that part. The ear is wired to solely listen to this part.

So people say they hear changes in cables.

Well, no freaking wonder.

And that is the simple analysis. Then it gets complex....
Riddle me this, Batman. Does the signal travel entirely in the conductor, entirely outside the conductor or part inside, part outside?