Article View: sci.electronics
Article #933Re: radio reception
From: Roy Smith
Date: Sun, 23 Jul 1989 02:39
Date: Sun, 23 Jul 1989 02:39
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In article <81@vax87.auc.dk> i8bla@vax87.auc.dk writes:
> The system you mention is probably the 'leeky feeder'. This can be used
> in tunnels, where you place an antenna outside to pickup the radio
> signal, an retransmit it on the coax cable. If the cable has some slots,
> you will experience an electromagnetic field, radiating from the cable.
The Port Authority of New York and New Jersey does this in the
Lincoln Tunnel. Interestingly enough, my reception is *better* in the
tunnel than outside. It's probably because I've got a trashy AM set which
barely works and in the tunnel there is less random interference.
The interesting part of the system is the the PA can break into the
normal re-broadcast for emergency messages. They do this, I believe, on
every AM channel.
--
Roy Smith, Public Health Research Institute
455 First Avenue, New York, NY 10016
{att,philabs,cmcl2,rutgers,hombre}!phri!roy -or- roy@alanine.phri.nyu.edu
"The connector is the network"
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!cs.utexas.edu!usc!apple!rutgers!cmcl2!phri!roy From: roy@phri.UUCP (Roy Smith) Newsgroups: sci.electronics Subject: Re: radio reception Message-ID: <3890@phri.UUCP> Date: 23 Jul 89 02:39:52 GMT References: <Jul.19.14.48.15.1989.439@athos.rutgers.edu> <81@vax87.auc.dk> Reply-To: roy@phri.UUCP (Roy Smith) Organization: Public Health Research Inst. (NY, NY) Lines: 19