KEEPING IN CONTACT with other radio units, Na- L tional Guard communications men group at transmitter during training at Ft. MacArthur. Left to right are Sgt. Lester Tablett, 21, of 18510 Pioneer Blvd., Artesia; SP-3 Donald Piazza, 23, of River--• .side; Sgt. John Barriatua, 21, of 3721 Magnolia Ave., and 1st Lt. Donald Sloper, 23, of 6610 Marcello Ave., Paramount.