Osram type U3 half-wave vacuum rectifier
date: label: date made
content: ca 1920
name: label: maker
content: Osram
notes: label: Description (Brief)
content: A half-wave vacuum rectifier with medium screw (Edison) base on one end, a single contact bayonet base on the other. Tube has a 8.5" lead wire attached to top terminal. Reference: https://www.radiomuseum.org/tubes/tube_u3_osram.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 Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.320988
label: catalog number
content: 320988
label: accession number
content: 241556
objectType: label: Object Name
content: rectifier
label: Object Name
content: electron tube, Osram Valve Rectifier
label: Object Name
content: electron tube
label: Object Name
content: vacuum tube
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 5 in x 2 1/8 in; 12.7 cm x 5.3975 cm