Re: Radar detector/jammers (fwd)

[John Greenstreet <jgreenst@motown.ge.com>]

Bob, Get this on how this guy claims a "passive" radar jammer works:

> Subject: Re: Radar detector/jammers (fwd)
> 
>   Okay, I'm having a hard time trying to explain how this device works.
>   I'll try again. The unit I use does not "change" the frequency. It does
>   not transmit a signal to overload or overpower the receiver. It does not
>   transmit a signal to "mask" the refelcted signal returned by the vehicle.
>   This unit reflects the signal back to the radar unit with some noise
>   mixed in to "confuse" the receiver into thinking that the velocity of the
>   vehicle is increasing and decreasing very rapidly, much faster than what
>   is physically possible with a vehicle with mass. This prevents the
>   receiver from "locking-on" to the reflected signal and prevents any
>   reading from being displayed on the radar unit. The jammer is really very
>   simple. It has the antenna/reflector and some type of diode, I think,
>   that generates the noise that gets mixed back in. I guess that
>   "technically" the diode could be called a "transmitter", much in the same
>   way as any vehicle ignition system, spark plug, car radio receiver, or
>   even any piece of wire that has an electrical current passing through it
>   could be called a "transmitter", perhaps even individual molecules and
>   atoms could be technically called "transmitters". From the legal and FCC
>   perspective, it is *NOT* a transmitter as the signal level is far to low.
>   How low? Dunno..... That is about the best I can do in trying to describe
>   how this device works, and work it does. I don't design, build or sell
>   these units and I don't own stock or interest in any company that does or
>   any supplier. My observations are based solely on real-world performance
>   of the unit of the course of several years and my experience with the
>   unit is related only as a service to others that might be interested in
>   such units (disclaimer).
> 
>   The theory on how this unit could work has bee reviewed by a very
>   sceptical engineer, an expert with radar, LORAN, radio receivers and
>   transmitters, amateur radio HW, is aand is also the owner of the MPH
>   Industries K55 radar unit used for the previsouly mentioned testing.
>