General Electric type TB1 "Kenotron" tube
date: label: date made
content: ca 1918
name: label: maker
content: General Electric Company
notes: label: Description (Brief)
content: A brass 3-pin (short) base with tipped S-shaped envelope. Donor card reads: "Diode: a kenotron made by the General Electric Company for the US government during World War 1. Used for the regulation of the output voltage of wind-driven airplane generators. Very ruggedly built to stand excessive vibration. About 4500 were made for the government during the war. Filament is pure tungsten, 10.75 volts at 1.45 amps. Anode is molybdenum. Maximum anode voltage 250 volts, maximum anode current about 125 milliamperes on the anode."
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.324344
label: accession number
content: 252994
label: catalog number
content: 324344
objectType: label: Object Name
content: diode
physicalDescription: label: Measurements
content: overall: 4 in x 1 3/4 in; 10.16 cm x 4.445 cm