🚀 go-pugleaf

In article <4264@rsmas.miami.edu> EAKIN@rsmas.miami.edu writes:
>In article <353@egrunix.UUCP>, besler@egrunix.UUCP (Brent Besler) writes:
>> 
>> In general the speedometer in the cop car may be off a couple of MPH, and that
>> can make big a big difference with regard to fines, etc.  Radar gun aren't 
>> wired into a cops speedometer.  They use a separate radar beam to determine
>> the speed of the cop car relative to the ground.
 well you were only half right the early moving RADARS used a magnet
and a hall effect sensor on one of the wheels for a speed pickup...
I know because I used (15 years ago) to install these on OK HPD vehicles
for a few short months.....the current tech I cant answer with certainty on
but I suspect it is still the same....GUNPLEXERS cost 100 times as much
as a hall effect sensor and the associated timing electronics...
     cheers
     kelly