De Forest spherical "Audion" radio tube
date: label: date made
content: ca. 1910
label: date made
content: ca 1910
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Estate of Dr. Ross Gunn, thru Mrs. Gunn
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.328377
label: accession number
content: 271982
label: catalog number
content: 328377
objectType: label: Object Name
content: vacuum tube
label: Object Name
content: triode
physicalDescription: label: Measurements
content: overall: 3 1/2 in x 2 in; 8.89 cm x 5.08 cm