Before 1940, EMI had devised, as a private venture, a radar system which would enable the range, bearing and elevation of an aircraft to be determined. The method and the design of the apparatus of the '60 MHz job', as the system was known, were almost entirely due to Blumlein. Remarkably, when the 'job' commenced in September 1939, EMI was ignorant of the activities of the Bawdsey Research station on radar.
EMP's '60 MHz job', Page 1 of 2
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