National Union type 371B half-wave rectifier
date: label: date made
content: ca 1943
name: label: maker
content: National Union Radio Corp.
notes: label: Description (Brief)
content: Aluminum base shell with ceramic insulator, 4 short pins, top contact, T-shaped envelope. Stamped on envelope: "371B". Donor’s card reads: “Half-wave rectifier made by National Union for the US government during World War II. This tube is an early version of the carbon plate model of the type 371B [catalog number 324823]. For use in high voltage low current applications. Thoriated tungsten filament, 5 volts at 6 amperes, maximum inverse peak voltage 40000, maximum anode current .75 ampere.” See also: https://www.radiomuseum.org/tubes/tube_371b.html.
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.324980
label: catalog number
content: 324980
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Diode
label: Object Name
content: rectifier
label: Other Terms
content: Electron Tube, Diode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 8 1/4 in x 2 1/4 in; 20.955 cm x 5.715 cm