Amperex type 221-A half-wave vacuum rectifier
date: label: date made
content: ca 1943
name: label: maker
content: Amperex
notes: label: Description (Brief)
content: A 4-pin metal base with top cap, T-shaped envelope. Donor’s card reads: “Half-wave vacuum rectifier made by Amperex Electronic Corporation, Hicksville, Long Island, for the US government during World War II. Filament: 5 volts at 10 amperes. Peak inverse anode voltage 25000, peak anode current 1.5 amperes.” See also: https://www.radiomuseum.org/tubes/tube_221a.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.324822
label: catalog number
content: 324822
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: 9 in x 2 3/4 in; 22.86 cm x 6.985 cm