Western Electric type 421-A twin triode
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: An 8-pin plastic base with center post, domed envelope. Stamped in envelope: "Western Electric / Made in U.S.A. / 421A". Donor’s card reads: “Double triode made by Western Electric Company, having individually heated cathodes. Intended for use as a series tube in regulated rectifier circuits. Heater type: 6.3 volts at 2.4 ampere. Plate voltage 110 at 125 milliamps. Extremely rugged construction.” See also: https://www.radiomuseum.org/tubes/tube_421a_we.html.
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.325014
label: catalog number
content: 325014
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: 5 1/4 in x 2 in; 13.335 cm x 5.08 cm