46 lines
2.2 KiB
Plaintext
46 lines
2.2 KiB
Plaintext
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Title: Jam Police Radar
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Date: 7/16/87
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Time: 5:28 pm
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L
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HIGHWAY RADAR JAMMING
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Most drivers wanting to make better time on the open road will arm
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themselves with an expensive radar detector. However this device will not
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work against a gun type radar unit in which the radar signal is not present
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until the cop has you car in his sights and pull the trigger. Then it is
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too late to slow down.
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A better method is to continously jam any signal with a radar signal of
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your own. I have tested this idea with the cooperation of a local cop and
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found that his unit reads random numbers when your car approached him. It
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is suprisingly easy to make a low power radar transmitter. A nifty little
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se miconductor called a Gunn diode will generate microwaves when supplied
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with 5 to 10 vdc and enclosed in the correct size cavity (resonator). An 8
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to 3 terminal regulator can be used to get this voltage from a car's system
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. However the correct construction and tuning of the cavity is difficult
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withou t good microwave measurement equipment.
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Police radars commonly operate on the K band at 22 ghz. or more often on
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the X band at 10.525 ghz. Most microwave intruder alarms and motion
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detectors (mounted over automatic doors in supermarkets, etc. ) contain a
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Gunn type transmitter/receiver combination that transmits about 10 m
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illiwatts at 10.525 ghz. These units work perfectly as jammers. If you
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can't get one locally write to Microwave Associates in Burlington, Mass.
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and ask for info on "Gunnplexers" for ham radio use.
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When you get the unit it may be mounted in a |stic box on the dash or
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in a weatherproof enclosure behind the plastic grille. Switch on the power
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when on the open highway. The unit will not jam radar to th e side of
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behind the car so don't go speeding past the radar trap. An interesting
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phenomena you will notice is that drivers in front of you who are using
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detectors will hit their brakes as you approach large metal signs or
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bridges. Your signal is bouncing off these objects and triggering their
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detectors.
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Have fun... Ben Piper
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Typed by: Pirates of Puget Sound Reprinted from: TAP magazine, November
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1983, Issue 88
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Confisicated From The Executive Inn 915/581-5145
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