Article View: sci.electronics
Article #22105Re: naive question about RF propagation
From: Paul Elliott x225
Date: Tue, 30 Jan 1990 16:37
Date: Tue, 30 Jan 1990 16:37
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1241 bytes
An engineer I once worked with told me that the tunnels near the Presidio
(military base in San Francisco) had these wires installed during WW2 so
the base commander (or whatever the military title is) could stay in contact
via two-way radio while driving around. I believe that the tunnel wires
originally had a tuned external antenna feeding the wire. You can see what
looks suspiciously like a diplole cut for the middle of the FM broadcast band
on the outside face of some tunnels. It probably works as an untuned antenna
for the AM band.
--
Paul M. Elliott Optilink Corporation (707) 795-9444
{pyramid,pixar,tekbspa}!optilink!elliott
"The dog ate my disclaimer."
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uwm.edu!bionet!arisia!lll-winken!tekbspa!optilink!elliott From: elliott@optilink.UUCP (Paul Elliott x225) Newsgroups: sci.electronics,rec.ham-radio Subject: Re: naive question about RF propagation Summary: wires in tunnels Message-ID: <3055@optilink.UUCP> Date: 30 Jan 90 16:37:12 GMT References: <28774@amdcad.AMD.COM> <480ec7fd.15840@valley.UUCP> <21957@unix.cis.pitt.edu> Organization: Optilink Corporation, Petaluma, CA Lines: 17