Catalogue
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Marconi Radio Valve Type DE3, by Marconi Company, London, c. 1923
Inventory Number: 16810
Number of documents: 3
Document Type: Miscellaneous Note
Document Heading: Inscription
Text:
"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 throughly tested before / leaving the Works, and no repsonsibility 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.
Document Type: Miscellaneous Note
Document Heading: Technical Details
Text:
The DE3 valve was introduced in 1923 and was intended for general purpose applications, although was primarily used as a detector or Audio Frequency (AF) amplifier.
Document Type: Miscellaneous Note
Document Heading: Manufacturer Details
Text:
Marconi-Osram Valve Co. Ltd. was founded in 1919, and took over the manufacture of Marconi valves from Ediswan, the trade name of the Edison and Swan United Electric Light Company Limited. The M-OV, as it was later known, was a joint Marconi-GEC valve-manufacturing company. It produced all of its valves at the Osram Lamp Works at Hammersmith, London.
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