Amateur Radio vs Citizen's Band (CB) Radio Many people incorrectly confuse ham radio with the more ubiquitous CB. Amateur Radio and Citizen's Band (CB) are two systems of two-way communication regulated and authorized in the US by the Federal Communications Commission. USES PERMITTED Amateur Radio: Noncommercial public service-oriented communication service. Hobby and experimental communications. Home computing by radio. Emergency and routine public service. Providing reliable two-way radio contact for special community events and activities. Transmission and delivery of free Radiograms on behalf of the general public. CB: Business and casual conversations. Public aid channel for emergencies. OPERATING RANGE Amateur Radio: Unlimited. Amateurs have communicated with orbiting astronauts. International communications are commonplace. CB: Limited by Federal Law to less than 150 miles. CB users typically talk within 4-5 miles. FREQUENCIES OFFERED Amateur Radio: More than two dozen Amateur frequency bands are spread across the entire airwave spectrum, from 1.8 kHz to 250 GHz. CB: One frequency band of 40 channels, from 26.96 to 27.41 MHz POWER PERMITTED: Amateur Radio: Up to 1,500 watts, if needed. Essentially unlimited antenna height and configuration. CB: Less than 5 watts. Antenna height is limited by Federal Law. HOW TO TELL WHO IS WHO Amateur Radio: Government-issued call signs indicating country/zone of operator, as well as personal identification. Formal station identification is required at frequent intervals. Operators also typically identify themselves in ordinary conversations using their real names. Most states offer licensees special Amateur Radio call sign license plates. CB: No formal system of identification. Users typically identify themselves by aliases or "handles."