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From: tgg@otter.hpl.hp.com (Tom Gardner)
Newsgroups: sci.electronics
Subject: Ridiculous Impedance
Message-ID: <1770009@otter.hpl.hp.com>
Date: 22 Aug 90 07:36:15 GMT
Organization: Hewlett-Packard Laboratories, Bristol, UK.
Lines: 9

Mini quiz:

Most coax cables have a characteristic impedance of 50 ohms or 75 ohms.

Why does TAT-7 (Trans-Atlantic Telephone cable number 7) have a characteristic
impedance of 61.8 ohms?

I'll give a piece of wedding cake to the first person with the correct 
answer.