De Forest tubular "Audion" radio tube
date: label: date made
content: 1916
name: label: associated person
content: De Forest, Lee
label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Description (Brief)
content: Donor card reads: "Commonly known as the Model T audion, this tube was announced in the De Forest Radio Tel & Tel Company Bulletin C-16, dated 15 March 1916, as being available for general use. Easily identified by the letters "DF" stamped on each plate, and the fact that the "T" had one filament, whereas its competitors had two. Manufacture of the spherical audions was discontinued at this time, and the old policy of returning some parts of the old tube to purchase a new one was also discontinued. Competition by this time (1916) caused De Forest to make the "T" available without restriction." No base, double ends (one tipped), two leads emerging from one end, 3 from the other, plastic insulation, T-shaped envelope, paper label.
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.324303
label: catalog number
content: 324303
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Triode
label: Object Name
content: triode
label: Other Terms
content: Electron Tube, Triode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 3 1/2 in x 1 in; 8.89 cm x 2.54 cm