Sylvania type 7Z4 full wave vacuum rectifier
date: label: date made
content: ca 1940
name: label: maker
content: Hygrade Sylvania
notes: label: Description (Brief)
content: A 6-pin metal base with glass insulators, T-shaped envelope, getter flash at top. Stamped on top: "7Z4". Paper label reads: "Hygrade Sylvania Corp. / Experimental tube - Not to be Sold." No technical information on label. Reference: https://www.radiomuseum.org/tubes/tube_7z4.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 Susan Horle
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.313845
label: catalog number
content: 313845
label: accession number
content: 195337
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: vacuum tube
label: Object Name
content: rectifier
physicalDescription: label: Measurements
content: overall: 3 in x 1 1/4 in; 7.62 cm x 3.175 cm