Re: Radar detectors (n oAudi content)

["Jeff Loh" <jeff.loh@fluordaniel.com>]

With the talk about how to mount detectors and all, I recently was 
forwarded on an interesting article from the net:

/J
88 80q

Subject:  (fwd) Radar jamming...
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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!