Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx> At 09:32 PM 3/18/2007, Tesla list wrote:
Original poster: "earl rhodes" <earl_1975@xxxxxxxxxxxxx> hi allisnt it possible the report is correct ?? cheap radios suffer serious bleedover from other radio sources !! im not ham i was citizen band ! surely police radio isnt very high quality mor just summat that works !!
Nope.. commercial land mobile radio is required to meet certain performance standards, just to be legally sold. And, then, while the local gendarmes aren't wealthy, they aren't that cost sensitive, that they would cheap out on the radios.
crap!! so does anybody know the frequencys were talking about !!
In the U.S., the police generally use low VHF (30-88 MHz, highway patrol, forest service), high VHF (150-174 MHz), or UHF (400+ MHz) and some 800 MHz trunking stuff these days.
A TC will put out some VHF power (as Terry Fritz measured a decade ago or so), but not all that much. It's also spread over a very wide bandwidth, so even if the total power is high, the power in any one channel is very low.