Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!fernwood!portal!cup.portal.com!dbell
From: dbell@cup.portal.com (David J Bell)
Newsgroups: sci.electronics
Subject: Re: Commercial radio transmitters
Message-ID: <37390@cup.portal.com>
Date: 30 Dec 90 08:33:54 GMT
References: <1990Dec20.172920.7325@phri.nyu.edu>
  <1990Dec21.135235.22887@cfctech.cfc.com>
  <1990Dec28.203208.2631@news.larc.nasa.gov>
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Organization: The Portal System (TM)
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from Scott Dorsey/ Kaptain Kludge:

>If there are two towers for an AM station, I would expect it is because
>they are using a long antenna sling between the two towers.  AM has a
          ^.... Hmm? Usually this was/is to allow ....^
           directional control of the transmitted signal,
           by feeding the two or more towers in particular
           phase relationships.
>fairly long wavelength (600 ft. or even longer), so the antennae are
>much larger than those for FM.
   ^.... True. The towers are normally 1/4 wave verticals.
    At 98 MHz, this is a LOT shorter than 1.1 MHz!

Dave     dbell@cup.portal.com