Article View: sci.electronics
Article #21308Re: wireless electricity
From: John Opalko, N7KBT
Date: Wed, 03 May 1989 19:44
Date: Wed, 03 May 1989 19:44
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In article <17794@cup.portal.com>, ISW@cup.portal.com (Isaac S Wingfield) writes: > Greg Wageman writes: >> >> Hmm, I guess you must be too young to remember crystal radios? These >> were radios that used a diode (originally, a germanium crystal and a > ^^^^^^^^^ > Nope. Iron pyrites (fool's gold). I'm not saying you're wrong, because I don't know whether or not iron pyrite will work. However, the traditional crystal set (so I've read; I'm not *that* old) used a galena crystal (lead sulfide). The inductor was wound on a Quaker Oats box. I don't recall what the capacitor was. Sometimes the builder had to spend hours moving the cat whisker around the surface of the crystal looking for an active spot. Sigh. Excuse me while I go suffer a fit of nostalgia... :-) John Opalko, N7KBT uunet!nwnexus!thebes!mcgp1!jgo
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cornell!uw-beaver!uw-june!uw-entropy!dataio!pilchuck!ssc!mcgp1!jgo From: jgo@mcgp1.UUCP (John Opalko, N7KBT) Newsgroups: sci.electronics Subject: Re: wireless electricity Message-ID: <1880@mcgp1.UUCP> Date: 3 May 89 19:44:43 GMT References: <gYJRpyy00WB-E57Uwj@andrew.cmu.edu> <913@snjsn1.SJ.ATE.SLB.COM> <17794@cup.portal.com> Distribution: na Organization: McCaw Cellular Communications, Inc., Seattle, WA Lines: 22