 From his arrival at Otago University, and assisted by his technician, Jack Sutherland, and other staff from the university’s physics department, Robert Jack undertook research and experiments in wireless radio transmission.1920–21 saw Jack back in the United Kingdom where he researched developments in naval radio communications and equipment with his brother, Hugh Jack, a respected electrical engineer.He returned to New Zealand with equipment that was to form the basis of his radio broadcasting apparatus and on 21 May 1921 was able to transmit voice and music across the university laboratory.