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From: commgrp@silver.ucs.indiana.edu (BACS Data Communications Group)
Newsgroups: sci.electronics
Subject: Re: Jamming Stereo Amplifiers
Message-ID: <55713@iuvax.cs.indiana.edu>
Date: 29 Aug 90 18:39:53 GMT
Sender: daemon@iuvax.cs.indiana.edu
Lines: 37


henry@zoo.toronto.edu writes:

>In article <55577@iuvax.cs.indiana.edu> commgrp@silver.ucs.indiana.edu (BACS Data Communications Group) writes:
>>He wound a few turns of heavily insulated wire around the perimeter of 
>>his living-room ceiling, and connected them in series with a spark gap 
>>and the secondary of a neon-sign transformer...

>Uh, guys, broadband jamming, which is what this is, can easily get
>someone killed by interfering with emergency communications or aircraft
>navigation.  It's not a good idea.

Spark-gap transmitters _are_ illegal.  Near-field magnetic induction 
signal strength decreases as the cube of the distance from the source.  
Thyristor lamp-dimmers are a more serious source of interference.

BTW, the device described above will jam a stereo even when it's not 
in radio mode.

Non-electronic ways to neutralize stereos:

(1)  Train a large dog to retrieve "ghetto blasters" and deposit them 
in the nearest body of water.

(2)  The ultimate weapon against portable stereos is a H&K MP-5 with 
integral suppressor and laser sight.  See your local class-III 
firearms dealer.

(3)  I know a medical doctor who waited until his inconsiderate 
neighbors were away, then told his landlord that he had locked his key 
in his apartment.  The landlord considered him a trustworthy fellow, 
and lent him the master key.  He entered the neighbors' apartment and 
sabotaged their stereo in several subtle ways.

--

Frank Reid     reid@ucs.indiana.edu