Radio Fire Alarm System For New Castle, Pa. New Castle, Pa., has awarded a contract for a 69-box coded-radio fire alarm system to Gamewell. The new equipment which will replace an existing wired fire alarm system installed prior to the turn of the century is expected to be in operation by the end of this year. Twenty-two of the 69 radio call boxes will be master units which, in addition to functioning as street alarm boxes, will permit automatic operation from fire alarm systems installed in buildings. The building alarm systems can be zoned within a single building, or a single radio box can serve as many as four separate buildings. Color selected for the boxes is limeyellow for greatest visibility.