Mullard EF50 Valve, 1939

Made:
1939 in England
maker:
Mullard Limited

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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

One complete EF50 valve, made by Mullard Limited, England, 1939

The EF50 radio valve, made by Mullard, was introduced commercially in 1946 but predates this - 1946 marked the year it was "demobbed" previously having being used by the British miliary Air Ministry VR91 or stores reference 10E/92. The EF50 was used in early British miliary radio sets during the Second World War and offered "a combination of technical innovation, versatility ... [and] distinctive appearance and the sheer volume of production." Many of the wartime radar sets containing EF50 became surplus in peacetime and were ingeniously converted into television receivers in the immediate post war years.

Details

Category:
Electronic Components
Object Number:
1948-90/1
Materials:
glass, metal (unknown) and plastic (unidentified)
type:
thermionic valve
taxonomy:
  • component - object
credit:
Donated by the Mullard Radio Valve Company