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2. Citizens band radio - Wikipedia

   en.wikipedia.org/wiki/Citizens_band_radio

   Shown with Astatic brand D-104 desk mic Cobra 18 WX ST II mobile CB radio with microphone Cobra 50 WX ST Handheld CB Radio Citizens band radio ( CB radio ) is a land mobile radio system , a system allowing short-distance one-to-many bidirectional voice communication among individuals, using two-way radios operating near 27 MHz (or the 11-m ...

3. CB radio in the United States - Wikipedia

   en.wikipedia.org/wiki/CB_radio_in_the_United_States

   Adjacent frequencies are often used by illegal operators using modified CB or amateur radio equipment. Operators sometimes refer to this activity as freebanding. The Industrial/Business Radio Pool of the Private Land Mobile Radio Services has several channels just above the Citizen's Band, at 27.430, 27.450, 27.470, 27.490, 27.510, and 27.530 MHz.

4. Land mobile radio system - Wikipedia

   en.wikipedia.org/wiki/Land_mobile_radio_system

   Land mobile radio systems use channels in the VHF or UHF bands, since the antennas used at these short wavelengths are small enough to mount on vehicles or handheld transceivers. Transmitter power is usually limited to a few watts, to provide a reliable working range on the order of 3 to 20 miles (4.8 to 32 km) depending on terrain.

5. Mobile cell sites - Wikipedia

   en.wikipedia.org/wiki/Mobile_cell_sites

   RDUs are mobile radio base stations transportable on trucks. Their use is strategic for the rapid expansion of cellular networks. A rapid deployment flanged pole is a mobile radio base station infrastructure transportable on a truck allowing fast and easy installation in restricted spaces. The antenna supporting pole, with a climbing ladder up to the summit, is fixed to the main base frame and i

6. List of CB slang - Wikipedia

   en.wikipedia.org/wiki/List_of_CB_slang

   CB slang is the distinctive anti-language, argot, or cant which developed among users of Citizens Band radio (CB), especially truck drivers in the United States during the 1970s and early 1980s, [1] when it was an important part of the culture of the trucking industry. The slang itself is not only cyclical, but also geographical.

7. Whip antenna - Wikipedia

   en.wikipedia.org/wiki/Whip_antenna

   The whip antenna is a monopole antenna, and like a vertical dipole has an omnidirectional radiation pattern, radiating equal radio power in all azimuthal directions (perpendicular to the antenna's axis), with the radiated power falling off with elevation angle to zero on the antenna's axis. [1]