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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Re: on outlets posted by Victor Khomenko on October 25, 2001 at 12:46:19:
Much of the resistance in the AC power system is caused by contacts. Improving these contacts significantly should then decrease the system resistance by a significant amount at high current draw. The silver/silver contact is very good, better than brass/brass. First, silver is too soft for use as an entire conductor. But on the nice strong brass, a plating makes a slightly softer layer of metal to mate with, and hence they physically combine better. Add to this the terrible conductivity of oxidized brass, as opposed to silver oxide, and we see that points at the edges of the contact, where the blades have not scraped clean, bust still have a light contact become part of the contact area. A small effect, clearly, but with silver it does increase the effective contact area very slightly. Also, the silver is just plain higher conductivity, making for lower resistance at a equal sized contact, and the resistance between silver and brass layers is too small to be relevant, considering how well silver plating takes to brass, and the huge area through which current can flow-this being the whole connector blade, rather than just the small wipe area which gets used. And as long as I'm talking minor effects, it does make the metal thicker, which should result in better overall conductivity and a tighter contact, as with no inserted plug the open area between wipes is reduced, and has the same mechanical strength, so will "grab" better.
I have, and will continue to use silver plating on AC connectors, and find that even plating just the plug when mating with a brass outlet still makes an audible improvement.
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Follow Ups
- Okay-I'll take a stab - badman 18:39:42 10/25/01 (2)
- Re: Okay-I'll take a stab - steve b 19:41:51 10/25/01 (1)
- All I was saying - badman 10:34:19 10/26/01 (0)
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