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In Reply to: RE: Some further thoughts on ends posted by Duster on May 11, 2014 at 18:00:56
the top plating coat be more subject to the often bandied about term "skin effect". Seems to me that the lower frequencies would easily penetrate the top layers and enter the base metal. IIRC, it was none other than MIT founder Bruce Brisson who told me that a 20 Hz wavelength would penetrate about 1/2 inch into a solid cable, so that the base metal of any cable or end was still quite critical for maintaining the lower frequency waveform integrity.
He claimed the reflections often created issues in cable design but that no one in their right mind would be using solid copper rod.. {atric's filing should in theory help the lower frequency spectrum. I'll have to go back and revisit the idea....Been lazy recently.
I do notice this effect with silver plated wire. Thickness of the silver plate can change the sound quite a bit. Too thin a plate and the cable sounds bright. The thicker the silver plate on copper, the better the cable sounds: less bright and fuller. Since silver costs considerably more than copper, though, most companies employ a rather thin silver plate.
Again YMMV and FWIW
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Here's a couple of George Cardas quotes.
See link:
current preamp outputs are available on some models. Cardas, if you notice, does not define at what point current becomes only skin effect, at least for audio signal.
There was a company based in the Pacific Northwest. Winston Ma, IIRC, was associated with the distribution of many esoteric audiophile items, and they had a solid copper RCA jack (Italian sounding name, IIRC). It was simply huge, the size of a 50 caliber shell and casing, IIRC. Apparently the issue was that making the RCA center out of copper was easy and fairly strong. Making the negative connection was much more difficult because the copper was so soft it deformed fairly easy, making it easy for the jack to make a poor contact.
Also if you peruse some of the latest RCA's, many have copper center pins.
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