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In Reply to: Re: Please would you justify... posted by pkell44 on October 12, 2006 at 18:57:59:
Tin is a realatively poor conductor, being 26th on a scale of 44 conductors and is only 4 'steps' above lead. It's specific resistance is 78.2 ohms per foot compared to copper's 10.4 ohms. Nickel (uuuugghh) is 17th on the scale @ 41.7 ohms/ft.Well it's easy to make things look really bad when you put it that way.
But let's be a bit realistic here. What's the resistance of a few microns of tin?
Let's say we have a contact area of just 1 square millimeter and the thickness of the tin is 10 microns.
All else being equal, the tin will add 0.00000115 ohms, or 1.15 micro-ohms of resistance.
If you've made a set of cables using 24 gauge copper wire, that's the equivalent of increasing the length of the wires by 0.0005 inch.
se
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Follow Ups
- Re: Please would you justify... - Steve Eddy 21:39:48 10/12/06 (0)