Western Electric type 231D triode
date: label: date made
content: ca 1926
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: A 4-pin base with tipped, T-shaped envelope. Markings: "Western Electric / Made in U.S.A. / 231-D". "The No. 231D vacuum tube is a three-element filament type tube for use as an audio frequency amplifier." Reference: https://www.westernelectric.com/s/231D.pdf; and Tyne, "Saga of the Vacuum Tube," pages 295, 297.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.322718
label: catalog number
content: 322718
label: accession number
content: 241556
objectType: label: Object Name
content: triode
label: Object Name
content: vacuum tube
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 in x 1 1/8 in; 10.16 cm x 2.8575 cm