Western Electric type 231D triode
date: label: date made
content: ca 1930
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: A 4-pin plastic base with tipless, T-shaped envelope. Stamped: "Western Electric / Made in U.S.A. / 231-D". Donor’s card reads: “Triode made by the Western Electric Company in 1926. Low filament drain type for use in telephony as an audio and intermediate frequency amplifier, detector, and oscillator. Interchangeable with the RCA type UX-199 tube. Filament is designed to operate on a current basis, as near to .06 ampere as possible, at approximately 3.1 volts.”
label: Description (Brief)
content: "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 Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.325220
label: catalog number
content: 325220
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: 3 5/8 in x 1 1/8 in; 9.2075 cm x 2.8575 cm