Western Electric type 211A transmitting triode
date: label: date made
content: ca 1922
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: Brass base with plastic insulator, 4 short pins. Tipped T-shaped envelope. Two insulators appear to be fiber board. Marked: "Western Electric / Made in U.S.A. / 211 A / Patd. U.S.A. / 1-15-07 12-19-16 / 2-18-08 12-17-18 / 4-27-15 5-13-19 / 6-24-19 1-27-20 / 6-13-22 / Pats. Applied For." Stamped on envelope: "2810 89B." Filament current of 3.4 amps at 9-10 volts. Anode voltage about 750, current 40-80 milliamps. Operating life about 300 hours. Designated by the Navy as CX-1818,and by the Signal Corps as VT-4. Reference: https://www.radiomuseum.org/tubes/tube_211a.html [not in WE site] Tyne, "Saga of the Vacuum Tube," 287-288.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.321058
label: catalog number
content: 321058
label: accession number
content: 241556
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: vacuum tube
label: Object Name
content: triode
physicalDescription: label: Measurements
content: overall: 7 1/2 in x 2 in; 19.05 cm x 5.08 cm