Western Electric type D / 201A telephone repeater triode
date: label: date made
content: ca 1916
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: Donor card reads: "Triode made by Western Electric Company about 1915 or 1916. Mounted on the 3-contact base made by the US Navy in that period, and is interchangeable with de Forest audion models .... Five volt filament is probably coated with a tantalum or other oxide to increase emission. Contacts on the bottom of the base are plate, grid, and one filament, the other filament being connected to the metal shell. US Navy designation was CW-186. The 3 pin and shell base was very microphonic. Three pin base was replaced by a 4 pin base; then known as "WE-201-B" and as telephone repeated type "D". This tube was made in small quantities for the US government in World War 1 and was replaced by the "J" tube, also known as VT-1 and CW-933."
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. Marked: "373-8".. 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 Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.324305
label: catalog number
content: 324305
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: 4 1/8 in x 2 1/4 in; 10.4775 cm x 5.715 cm