Marconi Radio Valve Type DE3, by Marconi Company, London, c. 1923 in Box

Subject: Radio communication; Radio communication; Radio communication; Radio communication
Item type: Object
Provenance: Presented by the Marconi Corporation.
Primary inscriptions: "MAR____ _____ VALVES" printed on exterior surface of bulb. "BBC [LOGO] / D.E.3 / D12109" painted on exterior surface of bulb. "Fil. Volts 2.4-3. Fil. Amps. 0.06. / D.E.3 This valve has been thoroughly tested before / leaving the Works, and no responsibility can / be accepted for Valves used under conditions / other than the above. / Suitable Anode Volts 20-80" printed on paper strip pasted to bottom of exterior surface of bulb. "A" and "G" stamped on base.
Physical material: Glass; steel; plastic?; brass?; assorted metals.
Object type: Radio valve
Dimensions: Diameter: 30mm Height: 115mm Weight: 0.05kg
Inventory No: 16810
Accession Number: 2004-9/237

Description

Marconi-Osram Triode Radio Valve (or Tube) Type DE3, in plain cardboard carton. With steel-plated plastic? base, and four brass? base pins.