[sci.electronics] Detecting Police cars was: Radar Detectors

wb8foz@mthvax.cs.miami.edu (David Lesher) (08/04/90)

>In Illinois, most police cars carry a Motorola receiver locked to the ISPERN
>frequency.  (A statewide emergency network.)  I have toyed with the idea of
>building an ISPERN detector; it would detect police _cars_, not the radar.

It can be done lots easier.
Some depts. equip their troops with mobile crossband repeators.
Thus the ticket_pusher's 450 mhz handheld will come out on the
car's 100 w. hi (or low) band radio, and verse vica.

All you need to do is listen on the car_to_trooper 450 mhz xmit
frequency. When you hear it, he's nearby!

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