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Leslie Harold Martin 391 or another’ . Laby was clearly impressed with the young Martin and, in 1923, nominated him for a Royal Commission for the Exhibition of 1851 Overseas Scholarship. He was awarded this together with a free passage to England, where he was to study at the Cavendish Laboratory, Cambridge, under Rutherford who himself had been an 1851 Overseas Scholar.
Leslie Harold Martin 393 By April 1928 Leslie Martin was established in Melbourne. Laby had evidently given this information to Ernest Rutherford who wrote back ‘ I am glad to hear Martin is shaping well and I hope he does not forget all his physics except X-rays. I found, in his exam: that he was uncommonly rusty about matters outside his research’ .
394 Biographical Memoirs War years At the outbreak of war in 1939 Leslie Martin immediately switched to projects initiated by armed service requirements. He first worked for the army on a capacity type proximity fuse and then for the R.A.A.F. on an acoustic communication system to enable the instructor and student pilot to talk to each other.
Leslie Harold Martin 395 Work also began in 1942 to produce magnetrons, klystrons and other valves needed for 10 cm and later 3 cm and 25 cm radar sets. A laboratory prototype NTA98 magnetron was made by May 1942, and after limited numbers had been made in the laboratory the technology for a range of these valves was transferred to the Amalgamated Wireless Valve Company and Standard Telephone and Cables Proprietary Ltd for manufacture in quantity. At the end of 1942 the valve laboratory was transferred to the University of Melbourne and Martin was placed in charge. While moving back to his university laboratory, he was appointed Deputy Chief of the Division of Radiophysics of the C.S.I.R. and was expected to spend time both in Sydney and Melbourne.