De Forest "Audion" tube
date: label: date made
content: ca 1918
label: date made
content: ca 1912
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
setName: label: See more items in
content: Work and Industry: Electricity
label: See more items in
content: Communications
label: Exhibition
content: Inventing in America
label: Exhibition Location
content: National Museum of American History
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.320363
label: catalog number
content: 320363
label: accession number
content: 242270
objectType: label: Object Name
content: triode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 3 1/2 in x 2 in; 8.89 cm x 5.08 cm