31 lines
2.0 KiB
Plaintext
31 lines
2.0 KiB
Plaintext
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 semiconductor
|
|
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 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, etc.) contain a
|
|
Gunn type transmitter/receiver combination that transmits about 10 milliwatts
|
|
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
|
|
plastic 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 the 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... Cryton
|