I think radar is considered a broadcast frequency as it is a radio wave.

 

I use the CB and brake lights of the cars in front of me as a radar detector.

 

Gonzo, you are correct, but all this is related in a way.<br>Shovelhead, to me a broadcast frequency is one that is used by the TV and commercial broadcast stations. A signal that is 'broadcast' by a radar jammer, a ham or CB'er is a different kettle of fish.<br>Now, back to radar detectors.....

 

Awww heck ....I give up.

Now taking you back to your regularly scheduled program.......

 

That IS a radio transmitter, but technically not a broadcast signal. However, as you said we are getting off the beaten track [read thread] so had better cool this transmission. ;D

 

Read a book by a retired NY trooper and he stated that any car he stopped for speeding got the ticket if he saw a radar detector. He suggested that detectors be kept out of view in order to help the driver in cases were the cop was considering a warning. He also discussed not wanting the cop to see your detector light up when they beam you from the rear.<br><br>Jerry

 

[quote author=Mexstan link=board=10;threadid=13423;start=0#126408 date=1049980620]<br>In my original question I forgot to ask if anyone has had any experience with the devices that supposedly make your vehicle &quot;invisible&quot; to radar. If so, would that be a better route to go as opposed to the detector? A few years ago there were plans available to take parts from a microwave oven and make your own. Never did go that route as I was afraid of leaky microwaves coming back at me.<br>[/quote]<br><br>The Consumer Advocate on the TV Station I work at has done tests of those a couple of times.<br>He &quot;buys it and tries it&quot; every Friday.<br>Consensus it that the only thing they make &quot;invisible&quot; is the money in your wallet. <br><br>He went out to the local race track, had the local police out there too, with their radar guns and tested it.<br>He then took it into the shop here, and had the engineers see if it was actually transmitting anything, and it wasn't<br>They then took it apart and found a battery compartment, a useless circuit board, and an LED that lit up when you turned it &quot;on&quot;. <br><br>Spend the money on one of the above mentioned detectors, and stay away from the snake oil.<br><br><br>phox

 

Heard about those scams and others. The one that I was considering actualy building myself used the magnetron and the waveguide from a microwave oven to supposedly confuse the police radar.

 

There is one technicality that no one stated. They are legal in most states.............Just illegal to use IF you are using it to circumvent the law. As far as I know it is not illegal to monitor the air waves.

 

That's the difference.<br>Monitoring is Okie-Dokie......Disrupting is a big No-No.

 

Just another aside... <br><br>Timing between two points to ascertain your speed is defined as a speed trap, and is illegal in CA. I'm not sure about other states, but you can pick up a copy of your local vehicle code for a few dollars, and it's good reading. <br><br>-SFB

 

I personally use a radar detector and it has saved my butt many times, even though I'm not necessarily trying to speed. They work the best in light traffic where you can catch the signal echoed off someone else, especially when the instant-on guns are used. I find it keeps me more mindful of the speed limit. <br><br>It's not difficult to build a radar jammer, but is a big no-no with the police when you use one.

 

I spent 20 years in the USAF working on radar detecting and jamming equipment. There are very few tecniques which will work all the time. Remember radar beams are electomagnetic energy traveling at 186000 miles per second. The Doppler shift is measured to get your speed. If you built a transmitter which was agile enough to shift its parameters, you would still have to worry about things like detection range and radar burn-thru. I totally agree with above posts of staying away from &quot;magic devices&quot;. My 2cts

 

Here is the proper way to defeat that pesky trooper with RADAR.<br>(just gotta find a way to do a slealth installation) <br>(just joking folks.....don't getcher BVDs in a bunch) <br><br><br><br>Used for air-to-surface anti-radiation attacks on hostile radar installations Unit cost: $284,000 <br>Power plant: Thiokol dual-thrust, solid propellant, rocket motor <br>Length: 13 feet, 8 inches <br>Launch Weight: 800 pounds <br>Diameter: 10 inches <br>Wing Span: 3 feet, 8 inches <br>Range: 80+ miles; 57+ nautical miles <br>Speed: 760+ mph <br>Guidance: Proportional/radar homing <br>Warhead: Blast fragmentation; warhead weight 146 pounds <br>