If the two radios have the same trainer port....you should be good to go......I've even been successful using a modern "square port" radio with the old "DIN" connector on the buddy box with the proper cable adapter. The modes of communication to the airplane have nothing to do with the trainer system. The master "talks" to the aircraft through its system...72...2.4...or whatever....the buddy box talks to the master through the trainer port by using the DSC...Direct Servo Connection.....there is no "transmission" from the buddy box. As GB said....set it up....just make sure all the channels on the buddy box are talking to the same locations on the master...and of course....TEST TEST TEST! You dont want to be surprised!


CB