Highway radar jamming                       by The Jolly Roger

Most drivers wanting to make better time on the open road will invest
in one of those expensive radar detectors. However, this device will
not work against a gun type radar unit in which the radar signal is
not present until the cop has your car in his sights and pulls the
trigger. Then it is TOO LATE for you to slow down.

A better method is to continuously 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 my car
approached him.

It is suprisingly easy to make a low power radar transmitter. A nifty
little semiconductor called a Gunn Diode will generate microwaves when
supplied with the 5 to 10 volt DC and enclosed in the correct size
cavity (resonater). An 8 to 3 terminal regulator can be used to get
this voltage from a car's 12v system. However, the correct
construction and tuning of the cavity is difficult without 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 & banks, etc.)
contain a Gunn type transmitter/receiver combination that transmits
about 10 kilowatts at 10.525 ghz. These units work perfectly as
jammers.

If you cannot get one locally, write to Microwave Associates in
Burlington, Massachusettes and ask them for info on 'Gunnplexers' for
ham radio use. When you get the unit it may be mounted in a plastic
box on the dash or in a weather-proff enclosure behind the PLASTIC
grille. Switch on the power when on an open highway. The unit will not
jam radar to the side or behind the car so don't go speeding past the
radar trap.

An interesting phenomena you will notice is that the drivers who are
in front of you who are using detectors will hit their brakes as you
approach large metal signs and bridges. Your signal is bouncing off of
these objects and triggering their radar detectors!

            HAVE FUN!
          -Jolly Roger-

P.S. If you are interested in this sort of thing, get a copy of
POPULAR COMMUNICATIONS. The ads in there tell you where you can get
all kinds of info on all kinds of neat equipment for all kinds of neat
things!

                                              -= Exodus =- '94

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