Article View: sci.electronics.misc
Article #24Re: Can mobile phones destroy sensitive electronics?
From: Tim
Date: Tue, 22 May 2001 03:56
Date: Tue, 22 May 2001 03:56
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> Consider that higher frequencies produce higher effective transient
> voltages in circuitry. At 50/60 hertz, there are many milliseconds fo the
> voltage to rise. At 400 megahertz and up, it happens in nanoseconds. You
> end up with higher voltages showing up in the wiring and the junctions.
> That is one of the crucial ideas behind EMP weapons and shielding.
> Also, while power lines have higher field densities than cell phones, they
> are quite a ways from you and the inverse square law holds. The cell phone
> can have a very low power output levelbut up close, it will utterly swamp
> the power line signal.
Or, in general the higher the transmitted frequency, the higher the voltage
per length of wire (like in transformers, volts/turn) - and in microwaves,
if you put in a half-burned match or toothpick, and turn it on (be sure to
have a glass of water for saftey if you want to try to possibly fry your
microwave by doing this), the charcoal conducts, and likewise is an antenna,
picks it up, arcs over, then apparently globs of plasma (which stay active
by acting as antennae themselves) will float off the toothpick and go about
the chamber, glowing, etc.
I've seen pictures of crazy people doing that, but wouldn't dare do it with
our microwave. (Oh, what can be found on the internet...)
Tim
--
"NEVER SEND SPAM. IT IS BAD"
- At bottom of some spam I got
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 111d0a,b39a96be9940783f X-Google-Attributes: gid111d0a,public X-Google-Thread: 107cee,b39a96be9940783f X-Google-Attributes: gid107cee,public X-Google-Thread: 1118be,b39a96be9940783f X-Google-Attributes: gid1118be,public X-Google-Thread: 108c83,b39a96be9940783f X-Google-Attributes: gid108c83,public X-Google-Thread: 103407,b39a96be9940783f X-Google-Attributes: gid103407,public X-Google-ArrivalTime: 2001-05-21 20:54:12 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!newsfeed.google.com!newsfeed.stanford.edu!feed.textport.net!sn-xit-04!sn-post-01!supernews.com!corp.supernews.com!not-for-mail From: "Tim" <tmoranwms@charter.net> Newsgroups: sci.electronics.misc,sci.electronics.components,sci.electronics.basics,aus.computers,aus.electronics Subject: Re: Can mobile phones destroy sensitive electronics? Date: Mon, 21 May 2001 22:56:00 -0500 Organization: Posted via Supernews, http://www.supernews.com Message-ID: <tgjon3oscrhj9e@corp.supernews.com> References: <3b04d952.4676022@news.tne.net.au> <3b05555a.13233681@news.navix.net> <3b0619c5.3331043@news.tne.net.au> <I4xN6.73175$4b1.5978184@bin1.nnrp.aus1.giganews.com> X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.50.4133.2400 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4133.2400 X-Complaints-To: newsabuse@supernews.com Lines: 29