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The antenna may not be more than 20 feet (6.1 m) above the highest point of the structure it is mounted to, or the highest point of the antenna must not be more than 60 feet (18.3 m) above the ground (47 CFR 95.408(c)) if installed in a fixed location. [4] CB radios must include AM or SSB modulation and may include frequency modulation. [5]
After the 1973 oil crisis, the U.S. government imposed a nationwide 55 mph speed limit, and fuel shortages and rationing were widespread.Drivers (especially commercial truckers) used CB radios to locate service stations with better supplies of fuel, to notify other drivers of speed traps, and to organize blockades and convoys in a 1974 strike protesting the new speed limit and other trucking ...
The first police radio systems were implemented in Detroit in 1928, when the Detroit Police Department set up a one-way radio system to broadcast crime information to police cars. [2] The frequency was assigned the call sign "KOP" by the Federal Communications Commission .
V-number tonnage drive manufacturer. type used with publication associated with V-1 trailer: 1-ton: 1 axle: unknown: antenna mount: PE-141: AN/CRN-2 V-2 trailer
Whip antenna on portable FM radio receiver Whip antenna on car. A whip antenna is an antenna consisting of a straight flexible wire or rod. The bottom end of the whip is connected to the radio receiver or transmitter. A whip antenna is a form of monopole antenna. The antenna is designed to be flexible so that it does not break easily, and the ...
1962: A sick infant, a disabled car on a Chicago freeway, and a January blizzard prompted Henry B. (Pete) Kreer to envision using CB radio to get help in such emergencies. Hallicrafters Radio sponsored the founding of REACT in April, with Kreer serving as its executive director. 1967: REACT approached the FCC for a designated CB Emergency Channel.
A police officer in some form of aircraft (see "Eye in the sky"). Bear rolling discos A speeding police car with its lights flashing. Bear trap Radar or speed trap. Bear with ears A police officer monitoring the CB airwaves. Blue light special A police vehicle with its blue strobe lights flashing (from the popular Kmart sale gimmick ...
A mast radiator or mast antenna is a radio tower or mast in which the whole structure is an antenna. Mast antennas are the transmitting antennas typical for long or medium wave broadcasting. Structurally, the only difference is that some mast radiators require the mast base to be insulated from the ground.
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