Western Electric type 216A vacuum triode
date: label: date made
content: ca 1923
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: Donor card reads: "Triode made by Western Electric Company. Used in a power amplifier made by Western Electric in 1923 or 1924 for home broadcast reception. This amplifier, one of the first push-pull arrangements sold commercially, had an output of about 6 watts of audio power, and contained the first commercial gear using a negative battery grid bias on the power tubes. Five volt oxide coated filament, up to 200 volts on the plate, and a 9 volt negative grid bias."
label: Description (Brief)
content: Western Electric type 216A high-vacuum triode. A triode amplifier - oscillator. A 4-pin base with tipped G-shaped envelope. Marked: "Western Electric / Made in U.S.A. / 216 A"; paper label around neck reads: "Licensed for use only as part of the Western Electric Loud Speaking Telephone Outfit." Reference: https://www.westernelectric.com/s/216A.pdf; Tyne, "Saga of the Vacuum tube," pages 291-293.
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.324311
label: catalog number
content: 324311
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 1/4 in; 10.795 cm x 5.715 cm