Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!usc!apple!fox!portal!cup.portal.com!ISW
From: ISW@cup.portal.com (Isaac S Wingfield)
Newsgroups: sci.electronics
Subject: Re: Making a galena crystal
Message-ID: <24541@cup.portal.com>
Date: 28 Nov 89 23:25:46 GMT
References: <1844@neoucom.UUCP>
Distribution: na
Organization: The Portal System (TM)
Lines: 12

Bill Mayhew's dissertation on crystal radios was great; brought
back some memories ... I did try to build a headphone once, (it
didn't work) and only years later did I realize that it must have
been about zero ohms plus or minus.

For hi-Z phones, check out Radio S***k, for fairly large, pink,
jam-it-in-your-ear type earphone. They use a ceramic piezo element
and are *really* high resistance, and very sensitive for this
application.

Isaac
isw@cup.portal.com


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