History of Science Museum: Collection Database Search

Record Details 2

Marconi-Osram Radio Valve Type DET 1A, by Marconi Company, London, 20th Century

preview image for Marconi-Osram Radio Valve Type DET 1A, by Marconi Company, London, 20th Century
Inventory Number: 64933
Object Type:
Place Created: London England United Kingdom Europe
Accession Number: 2004-9/475
Brief Description: Marconi-Osram Radio Valve (or Tube) Type DET 1A, with large glass balloon envelope. Unusual form of base: square red composition base with brass? base pins at four corners. With vertically-mounted nickel-plated anode and interior filament. Previously catalogued with Siemens & Haske Radio Valve Type RE87 (Inv. Num. 69068), GPO Radio Valve Type No 2 (Inv. Num. 26614).
Primary Inscriptions: "MARCONI OSRAM VALVE / MADE AT THE OSRAM LAMP WORKS / COVERED BY VARIOUS PATENTS / MADE IN ENGLAND / Y" printed on the exterior surface of bulb. "DET1A / 22" printed on the exterior surface of the bulb.
Provenance: Presented by the Marconi Corporation.
Collection Group: Marconi Collection
Material(s): Glass
nickel-plated
brass
plastic?
assorted metals.

Narratives

Image with multimedia irn 39614Image with multimedia irn 39615

Permalink: http://www.mhs.ox.ac.uk/object/inv/64933