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From: newton2@ucbtopaz.CC.Berkeley.ARPA
Newsgroups: net.video
Subject: Re: Mag tape shielding
Message-ID: <685@ucbtopaz.CC.Berkeley.ARPA>
Date: Mon, 28-Jan-85 02:16:08 EST
Article-I.D.: ucbtopaz.685
Posted: Mon Jan 28 02:16:08 1985
Date-Received: Wed, 30-Jan-85 06:24:11 EST
References: <4400005@iuvax.UUCP>, <494@hou5g.UUCP>, <372@othervax.UUCP>, <866@hound.UUCP>
Organization: Univ. of Calif., Berkeley CA USA
Lines: 5

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The fields are AC, but not EM. Just the near-(inductive)field. Shorting the
E-vector doesn't extinguish the (non-propagating) mag flux. Aluminum
makes a good electro"static" (Faraday) shield; need something permeable
for a mag shield, hence mumetal.