Rich, The answers to most of the questions you have been asking lately could be found if you search the BB archives. Here is a link to Clint's "how to" for SO-50 frequencies. http://www.work-sat.com/Work-Sat/Shack_Aids_files/sat-SO50-freqs.pdf Dave-KB1PVH Sent from my Verizon Wireless Droid RAZR