Abstract
THE new chairman of the Radio Section of the Institution of Electrical Engineers, Mr. F. Smith, delivered his inaugural address on October 13, under the title of “The Development and Design of Cooled-Anode Valves”. The term ‘cooled-anode valve’ is applied to all valves having anodes which form part of the envelope, without discrimination between the different methods of cooling. Probably the earliest valve using air-cooling was the Catkin receiving valve produced in 1933, as a miniature of the then existing large water-cooled transmitting valve. When similar methods of construction were used for valves of about 60-watts dissipation, it was necessary to add a radiator with fins to the anode. The approach of the Second World War, with its demands for special short-wave transmitting valves for pulse operation, led to the development of several series of valves with external anodes cooled by a forced air draught.
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Cooled-Anode Radio Valves. Nature 162, 767 (1948). https://doi.org/10.1038/162767b0
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DOI: https://doi.org/10.1038/162767b0