Western Electric type D / 201B telephone repeater triode
date: label: date made
content: ca 1917
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: A 4-pin brass shell with plastic insulator, tipped G-shaped envelope. Base shell stamped: "Pat. in U.S.A. / 1-15-07, two patents / 2-18-08, 4-27-15 / 12-19-16 / Pat. Applied for". Envelope stamped: "137779D". Reference: Tyne, "Saga of the Vacuum Tube," pages 103, 280, 344; https://www.radiomuseum.org/tubes/tube_201b_western.html.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Susan Horle
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.314050
label: catalog number
content: 314050
label: accession number
content: 195337
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: triode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 1/8 in x 2 3/8 in; 10.4775 cm x 6.0325 cm