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Record Details 2

Marconi Radio Valve Type DEQ, by Marconi Company, English, c. 1923

preview image for Marconi Radio Valve Type DEQ, by Marconi Company, English, c. 1923
Inventory Number: 29390
Object Type:
Place Created: England United Kingdom Europe
Accession Number: 2004-9/340
Brief Description: Marconi Radio Valve Type DEQ (Dull Emitter Q), in thin glass envelope. With single wire filament running the length of the envelope and tensioned by a spring at end opposite the anode and grid brass supports. The anode and grid connections are on the envelope and pass to a shaped piece of glass rod that supports the electrodes. The grid helix can be clearly seen within envelope. A distinctive feature of DEQ valve is green band of paint around centre of envelope. Type DEQ valves had a very high impedance and primary function was as detector.
Primary Inscriptions: "D.E.Q. MARCONI / VALVE / B / PATENTED / MADE IN ENGLAND / PRODUCED FOR M.I.M.C.CO.LTD. / 204" printed on exterior surface of bulb.
Provenance: Presented by the Marconi Corporation.
Collection Group: Marconi Collection
Material(s): Glass
steel
assorted metals.
Dimensions:
Height Width Depth Diameter Unit
75 27 mm

Narratives

Image with multimedia irn 35502Image with multimedia irn 35503

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