Hygrade Sylvania type 7L7 vacuum pentode
date: label: date made
content: ca 1940
name: label: maker
content: Hygrade Sylvania Corp.
notes: label: Description (Brief)
content: An 8-pin metal base with center post, getter flash, T-shaped envelope. Paper label reads: “Hygrade Sylvania Corp. / Type R.M.A. / Date Sample / Experimental tube -- not to be sold". Stamped on envelope: "7L7". Reference: https://www.radiomuseum.org/tubes/tube_7l7.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.313920
label: catalog number
content: 313920
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 1/8 in; 6.985 cm x 2.8575 cm