urbanriot Yep and we now have radar-detector-detector detectors… and jammers too. The jammers are illegal in many jurisdictions including many US states but that doesn’t stop a lot of people from having them.
They are illegal anywhere in the U,S., that stated I used to build them and discovered white noise jammer’s work the best, the problem is they only work about +/- 40% of the time due to the differences in frequencies, not the differences of the various bands RADAR is operating on mostly K, Ka, Ku, it is the frequency difference within the same band.
Here’s an example, this is a Ka RADAR antenna note the frequency is 33.4 to 36.0 GHz, that a rather wide range however it only operates on a very narrow frequency slice within that range somewhere around 1.5 MHz, however the entire range 33.4 to 36.0 is approved for use under FCC Part 90 for radio location which speed measurement RADAR is considered to be. The band is intentionally wide because it is very popular and the radiator in that antenna, a Gunn diode is tuned for maximum Effected Radiated Power not one particular frequency, as such if a jammer is not tuned real close to that antennas radiated frequency +/- .5 MHz it will not jam the unit’s ability to measure speed, that transmit frequency also varies due to heat and ageing of the Gunn diode,
Another problem with jammers is RADAR’s built in the past decade or so can detect when they are being jammed alerting the operator of the jamming, and if the operator is a LEO all the operator needs to do is watch approaching vehicles passing the patrol car and as they pass the one doing the jamming can be detected by the jamming indication clearing from the display.
Then it is time to pull that vehicle over to find out just what is going on.
urbanriot Channel 19 is still popular… “breaker one-nine, lookin for a smokey check”.
CB is really fading away, what is becoming real popular and taking it’s place are handhelds operating within the Family Radio Service (FRS) UHF allocation, they are very inexpensive units and under the proper conditions can have a range of up to a few miles, they also use FM modulation, unlike CB which is AM or SSB, and being FM they are rather immune to static.
Truckers are using them extensively and are getting much greater ranges by connecting the handheld to external roof top gain antenna, not quite legal, but no one is enforcing the FRS rules and regulations anyhow.
