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From: rbars@hila.hut.fi (Rainer B{rs)
Newsgroups: rec.audio.high-end
Subject: Re: How to build interconnects
Message-ID: <9901@uwm.edu>
Date: 4 Mar 91 13:34:08 GMT
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Approved: tjk@csd4.csd.uwm.edu
Originator: tjk@csd4.csd.uwm.edu



In article <9812@uwm.edu> peter%versatc.uucp@ames.arc.nasa.gov (Peter Tapscott ) writes:
>Michael from Florida wrote to ask how to build twisted pair
>shielded interconnects.  Since this might be of general
>interest, a posting seems be appripriate.
>
>The cable has three conductors:
>	signal
>	signal return
>	shield
>
** deleted lines ***
>
>Connect the shield to the shell of the RCA jack at
>the device receiveing the signal (preamp if this is
>a interconnect to a CD, amp if this is a preamp-amp
>interconnect.
>
** rest deleted **

Hi net!

I might be wrong, but I have read, that the shield should be grounded
in the end that has a lower impedance. Usually, I think, it is the
signal-feeding end of the equipment. The reason for this I do not know,
but maybe someone else does? This should be straightforward grounding
techniques without any mysteries.

And a question, which possible should be somewhere else:
Could somebody tell me what the impedance rating in coaxial cables in 
theory and practice means, and how is it calculated?

The views expressed are my only, and that is a d****d shame.

Rainer B{rs
Helsinki University of Technology
Laboratory of Engineering Geology and Geophysics