Oi, your really new here lol Repeater frequencies will require you to transmit on 467.#### and receive on 462.####. Open repeaters may still use a PL code. (This is used to filter out other conversations as there are only 8 channels for repeaters) Those codes are generally posted on the MyGMRS site as long as the repeater is listed there. Private repeaters require you to get permission to use the machine. Some require membership dues to help fund the repeater. To access those repeaters you will need to contact the repeaters owner or administrator for permission. when permission is given they will typically then tell you the codes to access the system. To use the repeater you will always need to use duplex mode (Transmit on one frequency, receive on another)