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From: chrisc%gold.gvg.tek.com@RELAY.CS.NET (Chris Christensen)
Newsgroups: rec.audio.high-end
Subject: Re: Cables and Shields
Message-ID: <9249@uwm.edu>
Date: 31 Jan 91 13:58:12 GMT
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In article <9225@uwm.edu> PH408014@brownvm.brown.edu (Tim Johnson) writes:
>On this question of shielded cables, twisted pairs, coax, etc....
>
>Someone has suggested shielded twisted pair.  I think there was also mention ofthree conductor coax, but it was dismissed for cost reasons.
>
>Will one of you electrical engineers tell me why this is a dumb idea: get some of that standard tinned copper braid, slip it over your coax interconnects, 
ground it.
>
>This would seem to give you a shielded coax at nominal cost.
>
>What do y'all think?
>
>                       -Tim

It sounds like a lot of work but there is no technical reason not to
due it. Except it would be better if you had seperate signal and
shielding grounds, ie  the earth ground and the signal separate.

The grounds should come together at one common point in the system and
depending on the grounding structure of the system lower levels of hum
may be had by only connecting the shielding ground on one end.

While this isn't a detailed molecule level discussion it should be a
start.

I saw a posting where someone was asking if a particular sound was hum
or hiss....

It has been my experience that hiss sounds like hisssssssssss, and hum
sounds like humumumumumumumum and buzz (which is a derivative of hum)
sounds like buuzuzuzuzuz or buuuuuzuuuzuuuzuuu or uzuzuzuzuzuzuzu or
zzzzzzzzzzz and hum usually contains hisssss.

Chris Christensen