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From: adams@ucunix.san.uc.edu (James Warner Adams)
Newsgroups: comp.periphs.scsi
Subject: Re: <13400@unixland.uucp>
Message-ID: <1991Mar3.175826.23579@ucunix.san.uc.edu>
Date: 3 Mar 91 17:58:26 GMT
References: <1942@public.BTR.COM> <283400058@adaptx1>
Sender: adams@ucunix.san.uc.edu (James W. Adams)
Followup-To: comp.periphs.scsi
Organization: University of Cincinnati
Lines: 21

In article <283400058@adaptx1> neese@adaptx1.UUCP writes:
>
>of the cable.  Myself, I like to use flat cable for the external and build
>my own.  Garantees impedence matching between the internal and external
>cables.  The FCC may not like it, but the flat ribbon cable is a good cable
>as you are garanteed all lines are the same length with alternate signal
>ground matching.

Shielded ribbon cable is available.  I have also found that simply
wrapping the cable spirally with a strip of aluminum foil and grounding
the foil at one end eliminates interference.  This may affect the
impedance, though.  I have never used this for anything faster than an
external floppy drive, so I don't know how it would affect a faster
device.  The convenience of ribbons with clamp-on connectors makes it
possible for anyone to fabricate a cable at minimum cost and effort.


-- 
       Jim Adams              Department of Physiology and Biophysics
adams@ucunix.san.uc.edu     University of Cincinnati College of Medicine      
<<This space for rent>>     The watched tape never streams..............