High Quality Content by WIKIPEDIA articles! UHF CB is a class-licensed (meaning licence fee free use for most users) citizen`s band radio service authorised by the governments of Australia and New Zealand in the UHF 477 MHz band. UHF CB provides 77 channels, including 32 channels (16 output, 16 input) allocated to repeater stations. It is similar in concept to the 40 channels used in United States` HF CB allocation, which is also available in Australia and New Zealand.