I have difficulty remembering which UHF CB radio channel I should be using. Here is my handy list for 80 Channel UHF. Duplex channels Repeater output 1-8 (5 emergency use only) 41-48 Repeater channels press the DUPLEX button on your radio to use any available repeaters Repeater input – do not use for simplex 31-38 (35 emergency use only) 71-78 Simplex channels 9-21 24-30 39-40 49-60 64-70 78-80 10 – 4WD drivers convoy, … more »