Western Electric type 203D triode
date: label: date made
content: ca 1918
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: A 4-pin plastic base with, tipped T-shaped envelope. Stamped on envelope: "Western Electric / Made in U.S.A. / 203-D / Pat. in U.S.A. / 4-27-15 6-24-19 8-21-23 / 10-17-16 1-27-20 12-18-23 / 12-19-16 6-13-22 5-5-25 / 12-17-18 8-7-23 8-16-25 / Pats. Applied For". Donor card reads: "Triode made by Western Electric Company during and after World War 1 for their own use. Similar in all respects, except filament voltage, to the VT-1 tube, also known as the "J" tube. It is used as a detector, audio amplifier or oscillator in radio equipment, and as a line amplifier in telephony. Oxide coated filament, 1 ampere at " 2.3 to 3 volts. Maximum plate voltage, 100; maximum negative grid bias 6 volts." Reference: Tyne, "Saga of the Vacuum Tube, pages 99-100.
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.324323
label: catalog number
content: 324323
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 1/2 in; 9.525 cm x 3.81 cm