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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 ...
The CB Radio Service spectrum is divided into 40 numbered radio frequency channels from 26.965 to 27.405 MHz. Channel spacing is 10 kHz between channel centers with exceptions where CBRS channels are adjacent to Radio Control Radio Service. The initial channel allocations had a gap equal to two channel spaces between channels 22 and 23.
In August 2005, India deregulated the 26.957–27.283 MHz band for license-free CB radio usage with a maximum power output of 5 watts. The channel plan follows channels 1–27 from the standard 40 channel CB plan originally adopted by the United States (and most other countries worldwide). Channel 1 is 26.965 and channel 27 is 27.275 MHz.
Channel 40 is the primary road safety channel Australia-wide, most commonly used by trucks including pilot/escort vehicles for oversized loads. [6] [7] Users should be aware that UHF CB channels 31 to 38 and 71 to 78 are the 'input' channels for repeaters. Users should avoid using these channels to avoid interfering with repeaters.
Illegal "freeband" CB activity can be heard from 25 to 28 MHz, steps with operators generally using AM below 26.965 (US and European CB channel 1) and SSB above 27.405 (US and European CB channel 40). CB radio in the UK can be heard from 27.60125 to 27.99125 MHz in 10 kHz steps as well as the lower 26.965 to 27.405 MHz allocation.
Citizens band radio (often shortened to CB radio) is a system of short-distance radio communications between individuals on a selection of 40 channels within the 27-MHz (11 m) band. In the United Kingdom, CB radio was first legally introduced in 1981, but had been used illegally for some years prior to that.
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