You 'should' be able to use the Prism as your buddy box. Two cords are available
Tower brand
http://www3.omnimodels.com/cgi-bin/w...I=TOWM6082&P=1
Futaba brand
http://www3.omnimodels.com/cgi-bin/w...I=FUTM4420&P=1
Allows the connection of a transmitter with a new square mini trainer plug to a transmitter having the old round port plug. This trainer cord can be used with HiTec radios as "students." It is recommended that the "student" radios should be shut off.