Mazda 1R5 heptode valve, 1933-1966

Made:
1933-1966 in Ponders End

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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

Mazda heptode frequency changer valve, type 1R5, made by Edison & Swan United Electric Light Company, Ponders End, London, England, 1933-1966

Details

Category:
Electronic Components
Object Number:
1966-125
Materials:
glass, metal (unknown) and plastic (unidentified)
type:
thermionic valve
taxonomy:
  • component - object
credit:
From the Ministry of Supply