Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84 exptools; site ihu1h.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!ihnp4!ihu1h!parnass
From: parnass@ihu1h.UUCP (Bob Parnass, AJ9S)
Newsgroups: net.ham-radio,net.video
Subject: Listen to Cellular Phones On Your TV Set
Message-ID: <562@ihu1h.UUCP>
Date: Mon, 6-May-85 22:53:08 EDT
Article-I.D.: ihu1h.562
Posted: Mon May  6 22:53:08 1985
Date-Received: Wed, 8-May-85 02:39:21 EDT
Distribution: net
Organization: AT&T Bell Laboratories
Lines: 37
Xref: watmath net.ham-radio:2666 net.video:1141

x
		Listening to Cellular Telephones
		     Using a Television	Set

     Several weeks ago,	I posted an article in which I	told
     of	 being	able  to hear 800 MHz land mobile communica-
     tions on my 800 MHz television set.

     Here are some excerpts from  a  letter  to	 the  editor
     appearing	in the May 1985	issue of Personal Communica-
     tions magazine:

	  "In reference	to your	March 1985 article on cellu-
	  lar  privacy,	 I  have  developed  a technique for
	  eavesdropping	on cellular users that	requires  no
	  fancy	  scanner,  no	computer,  no  sophisticated
	  antennas or any other	gimcracks....."

	  "....By using	the manual tuning  on  the  varactor
	  tuner	in my VCR I have little	difficulty listening
	  to the neighborhood cell sites on  my	 1973  model
	  Zenith  TV....   Since  sidetone  is transmitted I
	  hear both ends of the	conversation....."

	  "Handoff is an irritation,  but  frequently  I  am
	  able to manually sweep across	the band and pick up
	  where	they left me.  What really irks	 me  is	 the
	  low  audio  level from the TV	due to the deviation
	  mismatch."

	  "The real significance of all	this is	that  anyone
	  with	a  TV  and VCR connected to a TV antenna can
	  get the same results with a little practice...."

-- 
===============================================================================
Bob Parnass,  Bell Telephone Laboratories - ihnp4!ihu1h!parnass - (312)979-5414