The early days of the thermionic-valve industry¿some personal recollections

Between 1916 and 1920, the foundations of the Mullard Company, which celebrated its 50th anniversary last month, were laid by a small team of workers developing high-power transmitting valves for the Admiralty. In this article, the founder of the company - himself a member of that team - recalls some of the early work on these valves and how it led to the creation of a new industry.