Randall collaborated with Harry Boot, and they produced a valve that could spit out pulses of microwave radio energy on a wavelength of 10 cm. [3] On the significance of their invention, Professor of military history at the University of Victoria in British Columbia, David Zimmerman, states: "The magnetron remains the essential radio tube for ...

Henry Albert Howard Boot (29 July 1917 – 8 February 1983) was an English physicist who with Sir John Randall and James Sayers developed the cavity magnetron, which was one of the keys to the Allied victory in the Second World War.

John Randall and Harry Boot invented a prototype cavity magnetron – a device used to generate microwaves – in 1940 at the University of Birmingham, but the UK lacked the funds and manufacturing resources for large scale production.

Development of the Cavity Magnetron, 1939-1941. In this building from 1939 to 1941, University of Birmingham researchers John Randall, Harry Boot, and James Sayers conceived and demonstrated fundamental ways to improve the output power, efficiency, and frequency stability of cavity magnetrons.

Two members of the team, John Randall and Harry Boot began work with a magnetron in which they used cavity resonant circuits built into the magnetron itself. On 21 February 1940, the cavity magnetron succeeded.

2023年8月28日 · The real breakthrough came with the work of [John Randall] and [Harry Boot], who produced the first working prototype of a cavity magnetron. The device was different than the patented...

2021年3月23日 · John Randall and Harry Boot were appointed to work on these issues and produce a microwave oscillator. Oliphant asked them to explore miniature Barkhausen–Kurz tube s for this role, a design already used for UHF systems.

2007年2月5日 · John Randall and Harry Boot had invented the cavity magnetron almost by accident. It was a valve that could spit out pulses of microwave radio energy on a wavelength of 10cm. This was unheard...

Henry Albert Howard "Harry" Boot was an English physicist who with Sir John Randall and James Sayers developed the cavity magnetron, which was one of the keys to the Allied victory in the Second World War.

Prof. Sir John Randall & Dr Harry Boot photographed by Duffy in 1975 for the Sunday Times for an article titled 'Secret Weapon.' Russell Miller tells the story of how 30 years prior to publishing, Randall & Boot produced the cavity magnetron, which enabled surfaced submarines to be located precisely in the dark.