Marconi-Osram Radio Valve Type DER, by Marconi Company, London, c. 1923 | |||||||||||
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| Inventory Number: | 43964 | ||||||||||
| Object Type: | Object | ||||||||||
| Place Created: | London United Kingdom (England) Europe |
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| Subject Classification(s): | Radio communication Radio communication Radio communication Radio communication | ||||||||||
| Accession Number: | 2004-9/356 | ||||||||||
| Primary Inscriptions: | "MARCONI OSRAM VALVE / MADE AT THE OSRAM LAMP WORKS / COVERED BY VARIOUS PATENTS" printed on exterior surface of bulb.
"BBC [LOGO] / D.E.R. / _7577" printed on exterior surface of bulb. "Fil. Volts 1.8-2.0 Fil. Amps 0.4 av. Anode Volts 30-50 / 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." printed on label attached to upper section of exterior surface of base. | ||||||||||
| Provenance: | Presented by the Marconi Corporation. | ||||||||||
| Collection Group: | Marconi Collection | ||||||||||
| Material(s): |
Glass nickel plastic? brass? assorted metals. | ||||||||||
| Dimensions: |
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Narratives | |||||||||||
Permalink: http://www.mhs.ox.ac.uk/object/inv/43964