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Radios

CB Radio

CB Radio Article

More Cb radio information below this section

Citizens' Band radio (CB) is, in most countries, a system of short-distance, simplex radio communications between individuals on a selection of 40 channels within the 27 MHz (11 meter) band. The CB radio service should not be confused with FRS, GMRS, MURS, or amateur ("ham") radio. Similar personal radio services exist in other countries, with varying requirements for licensing and differing technical standards. In many countries, CB does not require a license and, unlike amateur radio, it may be used for commercial communication.

The Citizens' Band radio service originated in the United States as one of several personal radio services regulated by the FCC. These services began in 1945 to permit citizens a short-distance radio band for personal communication (e.g., radio controlled models, family communications, individual businesses). Originally, CB was located in the 460-470 MHz UHF band. There were two classes of CB: A and B. Class B radios had simpler technical requirements but were limited to a smaller range of frequencies. Al Gross, inventor of the walkie-talkie, started Citizen's Radio Corp. in the late 1940s to merchandise Class B handhelds for the general public.

The technology at the time was not advanced enough for UHF radios to be practical and affordable for the average consumer. So, in 1958, the Class D CB service was opened at 27 MHz, and this is what is popularly known as CB. There were only 23 channels at the time; the first 22 were taken from what used to be an Amateur 11-meter band, while channel 23 was shared with radio-controlled devices.