De Forest type OT-3 radio tube
date: label: date made
content: ca 1923
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Description (Brief)
content: A brass 4-pin base with tipped T-shaped envelope. Donor card reads: "Triode made by De Forest for the O and T Electric Company in the early 1920s. A 5 volt filament of otherwise unknown specifications." Tyne (Saga of the Vacuum Tube, page 360) reports that the tube was actually made by O&T Electric Corp, 1818 Broadway, New York, in violation of De Forest's patents, resulting in the inventor suing the company.
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.324348
label: catalog number
content: 324348
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 3/4 in x 1 3/8 in; 9.525 cm x 3.4925 cm