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The BNC (Bayonet Neill-Concelman) connector is a common type of RF connector used for the coaxial cable which connects much radio, television, and other radio-frequency electronic equipment. BNC connectors exist in 50 and 75 ohm versions, matched for use with cables of the same characteristic impedance. The 75 ohm types can sometimes be recognized by the reduced or absent dielectric in the mating ends. The 50 and 75 ohm connectors are typically specified for use at frequencies up to 4 and 2 GHz respectively. 75 ohm BNC Connectors are primarily used for video and DS3 Telco central office applications, whereas 50 ohm are used for data and RF. The BBC had a convention that BNC connectors used for video were always 50 ohm, maybe because an accidentally connected 50 ohm plug would damage a 75 ohm socket. Many VHF receivers used 75 ohm antenna inputs, so they often used 75 ohm BNC connectors. B2BManufactures.Com offers listing of Taiwan & China BNC Adapter manufacturers, BNC Connectors suppliers with explicit company profiles, product categories & product images. Global buyers could send inquires online.
source: Wikipedia: the free encyclopedia
