De Forest type 432 "Audion" tube in original box
date: label: date made
content: ca 1925
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Description (Brief)
content: De Forest type 432 "Audion" receiving tube in original box. DC screen grid amplifier. Plastic 4-pin base with S-shaped envelope. End connector. Etched on base: "De Forest / Audion / 432". Eighteen US patents on box run from 825637 to 1612440. Reference: Tyne, "Saga of the Vacuum Tube," pages 305-306; https://www.radiomuseum.org/tubes/tube_432.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.323227
label: catalog number
content: 323227
label: accession number
content: 241556
objectType: label: Object Name
content: triode
label: Object Name
content: vacuum tube
label: Object Name
content: electron tube
label: Other Terms
content: triode; Electron Tubes
physicalDescription: label: Physical Description
content: cardboard (box material)
label: Measurements
content: tube: 5 in x 1 7/8 in; 12.7 cm x 4.7625 cm
label: Measurements
content: box: 5 1/2 in x 2 1/2 in x 2 1/2 in; 13.97 cm x 6.35 cm x 6.35 cm