Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!wuarchive!udel!hanavin
From: hanavin@udel.edu (Chuck Hanavin)
Newsgroups: sci.electronics
Subject: Re: Television Detection
Message-ID: <9760@nigel.udel.EDU>
Date: 31 Jan 90 21:43:41 GMT
References: <3027@servax0.essex.ac.uk>
Sender: usenet@udel.EDU
Reply-To: hanavin@udel.edu (Chuck Hanavin)
Organization: University of Delaware
Lines: 14

In article <3027@servax0.essex.ac.uk> zotog@sersun0.essex.ac.uk (Zotos G) writes:
>Well, it is true that in England they detect non licence households with two ways.
>One is with a van with lots of antennas at the top and the other with some sort of portable detector which is used to places where the van can't go.
>
>Is  any one out there,who knows how it is done?
>
>Thenks.

Although not a two-way scheme, They could sit out in front of
your house with highly directional loop antenna and a reciever
tuned to the tv's mixer oscilator frequency. If they pick up a signal,
most likely you have a TV.

Chuck(WB3FJJ)