De Forest type 401A vacuum triode
date: label: date made
content: ca 1931
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Description (Brief)
content: A 4-pin plastic base with S-shaped envelope, partly silvered. Stamped on base: "de Forest / -Audion- / -401-A-". Reference: Tyne, "Saga of the Vacuum Tube," pages 305-306; https://www.radiomuseum.org/tubes/tube_401a.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 Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.322787
label: catalog number
content: 322787
label: accession number
content: 241556
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: vacuum tube
label: Object Name
content: electron tube
label: Object Name
content: triode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 1/2 in x 1 3/4 in; 11.43 cm x 4.445 cm