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Oral History of Defence Electronics
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{short description of image}{short description of image}{short description of image}{short description of image}{short description of image}{short description of image}{short description of image}{short description of image}{short description of image} Cooke-Yarborough was posted at Dundee, where the Air Ministry Research Unit had been relocated on the outbreak of war, under the supervision of Sidney Jefferson. His first job was in the radar transmitter department where he was to test frequencies using a rudimentary resonance circuit. This was done by measuring the output as light, through a small bulb known as a 'bollocky'. He also measured output power matching the light with light from a controlled mains source to get the voltage and current. However in a freak accident Cooke-Yarborough was electrocuted and asked to move away from the department.

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