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