In Reply to: Re: Resonances in interconnects posted by Fisherdude on November 9, 2004 at 04:21:24:
Skin effect happens at 60 hz...and below.I recall back in '74, reading about how the power companies, when transferring large currents, do not use a solid conductor that is over 4 inches in diameter. If they have to go larger, they start using tubular conductors.
As I recall, they pegged the useable thickness as a result of skin effect to be 2 inches.
Skin effect for speaker wires does happen..even below a Mhz..it is visible in the inductive measurement drop as frequency increases...with good measurement equip, it is possible to actually see the 15 nH per foot drop that results from skinning..
As you lower the temperature of copper, it will really start to skin at audio frequencies because of it's conductivity increase. It's three orders of magnitude increase by the time it reaches 4.5 Kelvin.
As to audibility of that 15 nH per foot change in speaker runs??? Don't ask me..
Cheers, John
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Follow Ups
- Re: Resonances in interconnects - jneutron 07:45:43 11/09/04 (18)
- Cryo skin effect? - Rob Thomas 13:56:01 11/09/04 (9)
- Re: Cryo skin effect? - Julien43 03:03:12 11/10/04 (1)
- Never trust a penguin! (nt) - Rob Thomas 09:47:38 11/10/04 (0)
- Re: Cryo skin effect? - jneutron 14:19:01 11/09/04 (6)
- Re: Cryo skin effect? - Rob Thomas 14:35:31 11/09/04 (5)
- Re: Cryo skin effect? - Steve Eddy 16:27:03 11/09/04 (4)
- need a job Steve?.. - jneutron 05:51:22 11/10/04 (2)
- Sure! - Steve Eddy 11:58:08 11/10/04 (1)
- Don't bother applying.. - jneutron 06:52:10 11/12/04 (0)
- Good stuff. Thanks. (nt) - Rob Thomas 21:49:04 11/09/04 (0)
- Excellent post... - Fisherdude 08:49:25 11/09/04 (4)
- You guys are outrageous. Thanks. We need a Leno/Letterman forum (nt) - free.ranger 15:55:57 11/09/04 (0)
- Re: Excellent post... - Steve Eddy 09:27:08 11/09/04 (2)
- Re: Excellent post... - jneutron 09:52:08 11/09/04 (1)
- Re: Excellent post... - Steve Eddy 11:29:28 11/09/04 (0)
- Re: Resonances in interconnects - Mike Mount 07:56:55 11/09/04 (2)
- Re: Resonances in interconnects - jneutron 08:28:43 11/09/04 (1)
- Re: Resonances in interconnects . . . confusion - Mike Mount 15:18:29 11/12/04 (0)