Hygrade Sylvania type 7C7 sharp cutoff pentode
date: label: date made
content: ca 1939
name: label: maker
content: Hygrade Sylvania Corp.
notes: label: Description (Brief)
content: A metal 8-pin base with center post, T-shaped envelope, getter flash. Paper label reads: "Hygrade Sylvania Corp. / [no data fields filled in] / Experimental tube - Not to be Sold." Stamped on top: "7C7". Reference: https://www.radiomuseum.org/tubes/tube_7c7.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.313840
label: catalog number
content: 313840
label: accession number
content: 195337
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: pentode
physicalDescription: label: Measurements
content: overall: 2 3/4 in x 1 1/4 in; 6.985 cm x 3.175 cm