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- From: myers@hpfcso.FC.HP.COM (Bob Myers)
- Date: Mon, 25 Jan 1993 04:51:50 GMT
- Subject: Re: Skin Effect in cables - what is it ?
- Message-ID: <7490280@hpfcso.FC.HP.COM>
- Organization: Hewlett-Packard, Fort Collins, CO, USA
- Path: sparky!uunet!wupost!sdd.hp.com!hpscit.sc.hp.com!hplextra!hpfcso!myers
- Newsgroups: rec.audio
- References: <1993Jan16.165520.4833@bernina.ethz.ch>
- Lines: 26
-
- > At audible freqs, skin effect does not come into play.
- > Our simulation tools here at Sun, do not look at skin effect on
- > signal transmission until we approach designs of well above 80 mghz.
- > Audible freqs, run out at 20,000 hz.
- > Measured skin effect differences at 100 mghz is less than .01 percent
- > from the outside of the wire to its core.
- > You tell me if that makes any difference. NOT !!!!!!
-
- Assuming that by "100 mghz", you mean what most folks would write as
- "100 MHz" (i.e., 100 x 10^6 Hz), I would (1) get a new simulation program
- and (2) read up a bit more on the "skin effect." (I may be wrong - I'm
- assuming that you're talking about some sort of normal conductor like
- copper. If you've found a conductor that doesn't suffer from this phenomenon
- up to 80 MHz, I think you're on to something...:-))
-
- Skin effect is definitely noticeable WAY below 100 MHz; as someone mentioned
- earlier, it's even "detectable" at audio frequencies, if you consider the
- upper 10s of kHz range to be "audible." The effect is negligible for any
- realistic cabling even up to 100 kHz, though, and even if it weren't you could
- more than adequately compensate for it by simply going the next larger wire
- size.
-
-
- Bob Myers KC0EW Hewlett-Packard Co. |Opinions expressed here are not
- Systems Technology Div. |those of my employer or any other
- myers@fc.hp.com Fort Collins, Colorado |sentient life-form on this planet.
-