History of Science Museum: Collection Database Search

Record Details 2

Marconi Radio Valve Type V24, by Marconi Company, English, c. 1925

preview image for Marconi Radio Valve Type V24, by Marconi Company, English, c. 1925
Inventory Number: 25470
Object Type:
Place Created: England United Kingdom Europe
Accession Number: 2004-9/326
Brief Description: Marconi Radio Valve Type V24, in thin glass envelope with caps at either ends, with grid and anode connections as envelope side pips, and single strand tungsten filament running entire length with a spring for tensioning. Construction was co-axial with helical wire grid surrounding filament and fitting within cylindrical anode. In this valve, 'U' shaped glass support holds two stout wire rods that attach to anode and grid respectively; thus electrodes are only supported at one end. BBC Logo ("ENTIRELY BRITISH MANUFACTURE") was used between September 1924 and 1927 and is a good indication of the date of origin. Previously catalogued with assorted other valves.
Primary Inscriptions: "MARCONI / VALVE / PATENTED / MADE IN ENGLAND / V.24 BBC [LOGO] / Z5350" 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 30 mm

Narratives

Image with multimedia irn 35430Image with multimedia irn 35431

Permalink: http://www.mhs.ox.ac.uk/object/inv/25470