Weagant external electroid control tube
date: label: date made
content: ca 1915
name: label: maker
content: Marconi Wireless Telegraph Co. of America
notes: label: Description (Brief)
content: A double-ended glass tube, no base, one end tipped. Lead wires emerge from both ends. Donor card reads: "Triode, made by the Marconi Wireless Telegraph Co. of America to the design of its chief engineer, Roy A. Weagant [1881-1942]. This tube, made about 1914 or 1915, has a V-shaped filament. A small flat disc is set in the envelope just above the point of the filament for use as a plate, and a grid is plated on the outside of the glass envelope. Very inefficient."
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.324313
label: accession number
content: 252994
label: catalog number
content: 324313
objectType: label: Object Name
content: Weagant tube
label: Object Name
content: triode
physicalDescription: label: Measurements
content: overall: 4.25 cm x .5 cm; 1 11/16 in x 3/16 in