Article View: sci.electronics
Article #3734Re: Undesired radio reception: mechanism?
From: Kenneth L Moore
Date: Wed, 15 Nov 1989 01:58
Date: Wed, 15 Nov 1989 01:58
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In article <1989Nov13.191239.25082@sj.ate.slb.com> greg@sj.ate.slb.com (Greg Wageman) writes:
>Opinions expressed are the responsibility of the author.
>
>In article <1044@umigw.MIAMI.EDU> wb8foz@Mthvax.Miami.Edu (David Lesher) writes:
>Why does that pulsing DC in the tin roof make it vibrate? I am
>familiar with the piezoelectric effect, but how many common materials
>actually exhibit it?
>
>Copyright 1989 Greg Wageman DOMAIN: greg@sj.ate.slb.com
I am a retired steel worker and have seen a coil of very heavy wire
(50-60 lbs) attached to a welding electrode jump every time the welder
drew an arc. In this case I think that the explaination is that the coil
of wire created an electromagnet which interacted with the current
flowing to the electrode. I don't know about flat plates of tin.
--
yahoo@unix.cis.pitt.edu (Kenneth L Moore)
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arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!pt.cs.cmu.edu!cadre.dsl.pitt.edu!pitt!unix.cis.pitt.edu!yahooReferences:
<19422@pasteur.Berkeley.EDU> <1044@umigw.MIAMI.EDU> <1989Nov13.191239.25082@sj.ate.slb.com>Show Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!pt.cs.cmu.edu!cadre.dsl.pitt.edu!pitt!unix.cis.pitt.edu!yahoo From: yahoo@unix.cis.pitt.edu (Kenneth L Moore) Newsgroups: sci.electronics Subject: Re: Undesired radio reception: mechanism? Message-ID: <20640@unix.cis.pitt.edu> Date: 15 Nov 89 01:58:57 GMT References: <19422@pasteur.Berkeley.EDU> <1044@umigw.MIAMI.EDU> <1989Nov13.191239.25082@sj.ate.slb.com> Reply-To: yahoo@unix.cis.pitt.edu (Kenneth L Moore) Distribution: usa Organization: Univ. of Pittsburgh, Comp & Info Services Lines: 19