Western Electric type 220-C triode
date: label: date made
content: ca 1924
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: A large glass tube with metal 2-pin top cap, side-mounted contact, and heat sink on bottom. Donor’s card reads: “Triode made by the Western Electric Company in the 1920s for use in the output stage of their 5 kw type 106-B AM broadcast transmitter. Water cooled with tungsten filament, 21.5 volts at 41 amperes, this tube has a thermionic emission of 7 amperes. Can be used either as a modulator or a final amplifier in such service. Wen used as a Class C final amplifier, 7500 volts on the plate and a 300 volt negative control grid bias, this tube will give about 5500 watts output in the conventional AM broadcast band.”
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.324547
label: catalog number
content: 324547
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: 20 1/4 in x 6 in x 4 in; 51.435 cm x 15.24 cm x 10.16 cm