Western Electric type 407-A twin triode
date: label: date made
content: 1948
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: A 9-pin glass base with tipped T-shaped envelope. Miniature tube. Stamped: "Western / Electric / 407A / Made in U.S.A. / 5739". Donor’s card reads: “Twin triode made by the Western Electric Company in 1948. Used as an amplifier, mixer, oscillator, multivibrator, and in clamp circuits through the VHF range. Center tapped heater arranged for either 20 or 40 volta at 100 or 50 milliamperes, respectively. Plate 150 volts, 2 volt negative control grid bias.” See also: https://www.radiomuseum.org/tubes/tube_407a.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.324871
label: catalog number
content: 324871
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: triode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 1 3/4 in x 3/4 in; 4.445 cm x 1.905 cm