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From: corey@verdix.com (Corey Ashford)
Newsgroups: sci.electronics
Subject: Re: Ridiculous Impedance
Message-ID: <646@verdix.verdix.com>
Date: 23 Aug 90 05:38:20 GMT
References: <1770009@otter.hpl.hp.com>
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Reply-To: corey@verdix.com (Corey Ashford)
Organization: Verdix Western Operations; Aloha, OR
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In article <1770009@otter.hpl.hp.com> tgg@otter.hpl.hp.com (Tom Gardner) writes:
>Why does TAT-7 (Trans-Atlantic Telephone cable number 7) have a characteristic
>impedance of 61.8 ohms?
>

It was a compromise, U.S. wanted a 50 Ohm Cable and Europe wanted 75.
So they setteled on something that was non-standard for both so
neither would get a better deal.  61.8 is about halfway inbetween
and corresponded to a cable impedance that was manufacturable with available
materials and tools.

How's that for B.S.?

- Corey "where's my cake" Ashford