Radar detecter alternatives. Techie input needed

[Ixion]

..

how much space is there on a bike?? Soon you might need a sidecar for the tech...

Heaps of space on a BMW!. Might just have to move the microwave over a bit closer to the fridge. Or mount the TV a bit higher .

[Gremlin]

Heaps of space on a BMW!. Might just have to move the microwave over a bit closer to the fridge. Or mount the TV a bit higher .

So your bike goes slow enough to watch a bit of telly then??

The microwave must make the winter-commute-while-having-breakfast comfy

[Legolas]

Originally posted by Biff Baff.
A bloke down the pub told me that many of the nations police coughiffers may or may not be slowly migrating over to a new radio system soon.

This has already happened in Northants, UK. They are supposed to be un-scanable. It works on a similar system to mobile phones, I think. In fact the handset is quite like a mobile with extra features on it.

[Krusti]

I see on one of the American radar sights that sells the Blinder Scrambler etc that they are developing a KA band jammer.....be interesting to see if it works....however it may just create more problems if caught with one!

[Lou Girardin]

I see on one of the American radar sights that sells the Blinder Scrambler etc that they are developing a KA band jammer.....be interesting to see if it works....however it may just create more problems if caught with one!

There's two possibilties with jammers;
1/ It transmits a freq corresponding to a certain speed. In NZ it would have to be 50 km/h, or even less if you include temp speed zones. Now not all cops are dumb enough to think a reading of 30 km/h on the m/way is not suspicious.
2/ The better way is to transmit a freq that shows either no speed or something impossible like 400 k's, then shut off after a few seconds. By then you've slowed and if he zaps you again, you're legal.

[Timber020]

How about paying some guys on bikes to follow the traffic cops, and have them carry a tracking system that riders can pick up on with a special tranciever (that you rent out with a monthy fee). This is not a system to encourage speeding, but to know where local police are in case you need to ask directions. That way we would all feel more safe.

How hard would it be to stealth up a bike? make it like a b2 bomber.

[Pixie]

Also there's going to be on another problem. Once you reach those sorts of speeds you have to take into the account a quite severe doppler effect. .

What speeds you talkin' 'bout? Relativistic? You have FTL drive on bike?
Do you find time dilation a problem?
"I went out for a ride .When I got home the Apes had taken over Earth!"
Don't think you'll have a problem with doppler effect ,red shift,blue shift etc on a terrestrial vehicle .

[Pixie]

Interesting thought. Given that it's really only a handful that we (oops, a hypothetical group of people, NOTHING TO DO WITH ANYONE HERE) have problems with.

Transponders is cheap. So it's just a matter of figuring out how to attach them. Not sure that it would be breaking any law. After all, none of us have any reason to avoid Mr Plod .

If you are going to the trouble of attaching transponders to cop cars-stick some composition 4 to the while you are at it.

[inlinefour]

Yea, like don't speed at all...

[FzerozeroT]

I heard a rumour that the motion detectors from house alarm systems could be rigged up as radar jammers?

[Lou Girardin]

They use infra red units as laser jammers in the UK. Don't know how effective they are.
RF units wouldn't work as jammers.

[Flyingpony]

Alternative to all techy gadgets - 6th gear!! Fifth on some bikes. Not that i ever would dream of doing such a thing.

sixth at 50km/h ... engine ticking over slowly at about 4000rpm.
Or
sixth at 100km/h ... engine ticking over happily at about 8500rpm.

[inlinefour]

sixth at 50km/h ... engine ticking over slowly at about 4000rpm.
Or
sixth at 100km/h ... engine ticking over happily at about 8500rpm.

3rd at 50km/h...engine ticking over happily at about 8500rpm. If you can't do that then your a moron(PT)

[Dafe]

Doppler effect would be no issue at all. Bear in mind that radar waves travel 1 radar mile at 12.36 micro seconds, and radar waves are radio waves. Therefore you would probably need to pull about 5000km per before you'll need to incorporate a doppler adjustment.
I highly doubt that a police frequency receiver would be of any use. Quite simply, Police do not transmit frequently on their radios and if you are considering detecting a vehicle which is listening to police frequencies, it can't be done. Simply because those frequencies you are trying to detect are infact all around you already. A police vehicle will recieve these signals but will not emit any signal of strength that will give a detectable signature. You can definately detect a transmitting vehicle but who would be bothered as that is so infrequent. Your Radar Detector beats these options hands down. Personally, I find Radar Detectors so useless that I just wouldn't bother with them at all. There is only one way to beat Radar - JAMMERS!!!!!!! But they're illegal in NZ as you must be licensed to transmit and also transmissions on police frequencies are highly illegal.

What I do know, Is that Police find it quite abit harder to lock up a motorbike.
How would RAM paint perform on a motorcycle???? (Radar Absorbant Material).

[N4CR]

Found the anarchist cookbook 2000... a little bit of info here (not much help though )...

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 (resonator). 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«25 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«25 GHz. These units work perfectly as jammers. If you cannot get one locally, write to Microwave Associates in Burlington, Massachusetts 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-proof 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!

Seems the reference to K and X bands makes it a little outta date. Wouldn't the cops start raking more money in if they suddenly changed to the 'door opening' radar bands while people set them to ignore... hehehehe hope noone gets any ideas.

Hopefully this helps
-Tristan