De Forest / Marconi "Audion" radio tube
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Description (Brief)
content: A brass 4-pin base with plastic insulator ("S" stamping) with a pinched envelope, top tipped. Vertically mounted copper coil inside a cylinder that extends into a dome below the tip. Stamped on one side: Marconi / Trade Mark / Fleming Patent [...]3684"; stamped on the other: "De Forest Audion / U.S. Patent Nos. 841387-879532 / Sold only for amateur / and experimental use." Paper label handwritten: "B-35-45 / Naito / A.5 Volts / .4-.5 amps".
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Marshall N. Waterman, Frances Waterman and Ruth Waterman Ritch
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.313464
label: catalog number
content: 313464
label: accession number
content: 187068
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 1/2 in; 9.525 cm x 3.81 cm