Marconi British "R" tube
date: label: date made
content: ca 1915
notes: label: Description (Brief)
content: A 4-pin (long) brass base with tipped G-shaped envelope. Donor card reads: "Triode made by the Marconi Wireless Telegraph Co., Ltd. of England for the British army, and known as the "R" valve. Probably made in France as it is an exact duplicate of the Metos tubes [catalog numbers 324334, 325335, and 325336]. Filament: 5 volts at 1 ampere."
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.324347
label: catalog number
content: 324347
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Triode
label: Object Name
content: triode
label: Other Terms
content: Electron Tube, Triode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 1/4 in x 2 in; 10.795 cm x 5.08 cm