Western Electric type 249-B half-wave mercury rectifier
date: label: date made
content: ca 1935
name: label: maker
content: Western Electric
notes: label: Description (Brief)
content: A 4-pin plastic base with top contact, ceramic insulator, S-shaped envelope. Donor’s card reads: “Half-wave mercury rectifier made by the Western Electric Company about 1935. Filament: 2.5 volts at 7.5 amperes. Voltage drop, 15; maximum peak anode voltage 7500; maximum anode current .64 ampere.” See also: https://www.radiomuseum.org/tubes/tube_249b.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.325174
label: catalog number
content: 325174
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: 7 in x 2 1/2 in; 17.78 cm x 6.35 cm