What is a CB?
AI GENERATED FROM BRAVE SEARCH ENGINE
CB most commonly refers to Citizens Band radio, a two-way short-distance communication system operating on 40 designated channels between 26.965 MHz and 27.405 MHz in the high-frequency (HF) band. It is widely used by truckers, motorists, hobbyists, and businesses for personal or commercial communication, especially in areas with limited cell phone coverage.
- No license required: In the U.S., Canada, and many other countries, operating a CB radio does not require a license, making it accessible to the general public.
- Channels and usage:
- Channel 9 is reserved for emergency communications.
- Channel 19 is commonly used for general conversation and traffic reports.
- Technology: CB radios are transceivers (can both transmit and receive) and typically use AM or SSB (Single Sideband) modes. SSB offers clearer signals and longer range than AM.
- Range: Typically 5–30 km (3–20 miles) under normal conditions, though propagation effects can allow communication over much greater distances.
- Historical significance: CB radio gained widespread popularity in the 1970s, especially among truckers, and was popularized by films like Convoy (1978), music such as C.W. McCall’s “Convoy,” and TV shows like The Dukes of Hazzard.
Other meanings of CB:
- Cornerback: A defensive position in American and Canadian football responsible for covering wide receivers.
- Cumulonimbus cloud (Cb): A large, towering cloud associated with thunderstorms, heavy rain, lightning, and severe weather.
- Construction Battalion: In the U.S. Navy, a "CB" can refer to a Navy Construction Battalion, commonly known as the Seabees.
- Companion of the Bath (CB): A British honorific title.
- Centre of buoyancy (CB): A term used in naval architecture.
The most prevalent modern usage—especially in the context of communication—is Citizens Band radio.
AI-generated answer. Please verify critical facts.
Sunday, January 25, 2026 07:28PM