Original cavity magnetron

Made:
1940
maker:
John Turton Randall
and
Henry Boot
Magnetron Block as used in the original Magnetron Valve of Original Cavity Magnetron Valve of Randall and Boot Original cavity magnetron Original Cavity Magnetron Valve of Randall and Boot Original Cavity Magnetron Valve of Randall and Boot Original Cavity Magnetron Valve of Randall and Boot Original Cavity Magnetron Valve of Randall and Boot Original Cavity Magnetron Valve of Randall and Boot

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

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License this image for commercial use at Science and Society Picture Library

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

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License this image for commercial use at Science and Society Picture Library

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

Buy this image as a print 

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License this image for commercial use at Science and Society Picture Library

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

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License this image for commercial use at Science and Society Picture Library

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Creative Commons LicenseThis image is released under a CC BY-NC-SA 4.0 Licence

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Magnetron Block as used in the original Magnetron Valve of
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Original Cavity Magnetron Valve of Randall and Boot
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Original cavity magnetron
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Original Cavity Magnetron Valve of Randall and Boot
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Original Cavity Magnetron Valve of Randall and Boot
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Original Cavity Magnetron Valve of Randall and Boot
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Original Cavity Magnetron Valve of Randall and Boot
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Original Cavity Magnetron Valve of Randall and Boot
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