Shawn wrote:
> As you may know from physics class, electronics travel along
> the outside
> diameter of each of the copper strands. As a result, finer copper
> strands means more strands fit into a given wire gauge
> diameter. That equals greater electron flow.
The depth to which an AC current penetrates a conductor is inversely
proportional to the frequency (called the skin effect). The skin depth at 20
KHz in copper is ~ 1mm, so it has a minute effect. Note that if the fine
strands are close to each other, their magnetic fields will interact to some
extent, which reduces any skin effect reducing advantage.
> remember seeing
> a magazine article quite some time ago where someone tested cheap
> 18-gauge mains cable against high-quality, oxygen free speaker cable.
> They used very expensive test equipment, and the result
> was that the difference was very miniscule and probably inaudible.
> I can't remember which magazine
Douglas Self wrote an article about this in Electronics World a couple of
years ago. He concluded that common multistranded 5A mains flex made an
excellent speaker cable.
simon
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