Western Electric type D / 201A telephone repeater triode
date: label: date made
content: ca 1917
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: A 3-pin brass shell base with plastic insulator, tipped G-shaped envelope. Tube also known as Navy type CW-186. Stamped on base shell: "Pat, in U.S.A. / 1-15-07 two patents / 12-18-08, 4-27-15 / 12-9-16 / Pat Applied For"; on base insulator, "201-A"; paper label reads: "Caution: Filament Current Muse / Never Exceed 1.3 Amperes." Reference: Tyne, "Saga of the Vacuum Tube," pages 103, 280, 344.
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.314075
label: catalog number
content: 314075
label: accession number
content: 195337
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 2 1/4 in; 9.525 cm x 5.715 cm