Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!zaphod.mps.ohio-state.edu!mips!prls!gordon
From: gordon@prls.UUCP (Gordon Vickers)
Newsgroups: sci.electronics
Subject: Re: Stereo Amplifier Jamming
Message-ID: <43322@prls.UUCP>
Date: 30 Aug 90 17:08:08 GMT
References: <1990Aug27.215353.5186@murdoch.acc.Virginia.EDU> <33388@cup.portal.com>
Reply-To: gordon@prls.UUCP (Gordon Vickers)
Organization: Philips Research Labs, Sunnyvale, California
Lines: 31

In article <33388@cup.portal.com> mmm@cup.portal.com (Mark Robert Thorson) writes:
->Go to an electronics hobbyist shop and look for an "FM wireless mike"
->kit or assembled unit.  If the circuit does not have provision for tuning,
->you can try spreading or compressing the turns of the small coil to change
->the frequency.  If you find you need additional range, increase the length
->of the antenna.
->If we were talking about jamming a TV signal, three Schottky inverters

       I have an RF signal generator that can modulate at 400 Hz, 1000 Hz,
   or accept the input from a microphone or my audio generator and "broadcast"
   this on anything between 100Khz-700+Mhz.  The problem with this and the
   "wireless mike" approach is that it can take a while to find out which
    am/fm/tv station the offender is listening to.  Often it's a damned
    tape.

       Isn't 78Khz the most commonly used modulation frequancy used in
    cassette tape players ?  How effective might a transmitter be against
    these ?  Jamming these is becoming VERY tempting as a neighbor of
    mine has a car sterio that is so loud that the bass from it becomes
    annoying as soon as he turns onto our street and at that point he
    is no less than 1/4 mile away !   I'd love to fry his tape player but
    would settle for piercing his ears with a high pitched tone.

       As for the AM/FM neighbors, I don't live in an appartment anymore
    so that isn't a problem but rather than use a wireless mike or an
    RF generator I think I'd prefer modulating 455Kh or 10.7 Mhz with
    a "polite" message, referring to him/her by name.

Gordon Vickers                     {mips,pyramid|philabs}!prls!gordon  
WANTED: 2KW wideband transmitter with directional antanna.  Operable from
   car cigarette lighter would be a plus.   :-)               (just kidding)