Original cavity magnetron

Original cavity magnetron (Cavity magnetron) Original cavity magnetron (Cavity magnetron) Original cavity magnetron (Cavity magnetron) Original cavity magnetron (Cavity magnetron) Original cavity magnetron (Cavity magnetron) Original cavity magnetron (Cavity magnetron) Original cavity magnetron (Cavity magnetron) Original cavity magnetron (Cavity magnetron)

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Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Original cavity magnetron, developed by John Randall and Henry Boot in 1940, with spare anode block.

This is the original magnetron, which made it possible to build radar sets small enough to fit into aircraft. The earliest radar was ground-based, employing massive 100 metre masts in the celebrated 'Chain Home' system, which helped win the Battle of Britain. But, to counter submarines and night bombers, radar had to be miniaturised to be carried on aircraft. John Randall and Harry Boot's cavity magnetron was the first practical device for producing the ultra-short radio waves at adequate power to enable the system to work. Magnetrons later formed the heart of microwave ovens.

Details

Category:
Radio Communication
Object Number:
1946-107
Measurements:
overall: 260 mm x 260 mm x 180 mm,
type:
cavity magnetron
credit:
Professor Randall and Dr. Boot