Article View: sci.electronics
Article #21345Crystals (was Re: wireless electricity)
From: George Pell
Date: Sat, 06 May 1989 18:33
Date: Sat, 06 May 1989 18:33
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1408 bytes
In article <1357@frog.UUCP> john@frog.UUCP (John Woods) writes:
> (stuff about crystal radios)
>
>Also sometimes a crystal of galena (lead sulfide?).
>
>I remember reading in a really OLD book of kid's science projects about
^^^
>how you could use a rusty disposable razor blade and a bent safety pin
>as a detector...
(I'm not OLD, you must just be YOUNG)
The disposable razor must be a 'blue blade'. I built one of these
when I was a kid. The platinum type won't work.
Does anyone know of a source for galena crystals? A person I
bumped into at a book store was looking for one, and I called
around. Seems that the last source known to Portland Radio
has stopped making them.
Am I the owner of the last galena crystal on earth??
geo
(only 40 and counting)
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!lll-winken!uunet!tektronix!zephyr!vice!georgep From: georgep@vice.ICO.TEK.COM (George Pell) Newsgroups: sci.electronics Subject: Crystals (was Re: wireless electricity) Keywords: crystal catwisker razor blades Message-ID: <3569@vice.ICO.TEK.COM> Date: 6 May 89 18:33:47 GMT References: <gYJRpyy00WB-E57Uwj@andrew.cmu.edu> <913@snjsn1.SJ.ATE.SLB.COM> <17794@cup.portal.com> <1357@frog.UUCP> Reply-To: georgep@vice.ICO.TEK.COM (George Pell) Distribution: na Organization: Tektronix, Inc., Beaverton, OR. Lines: 24