National Union type 6A7 "Radiotron" pentagrid converter
date: label: date made
content: ca 1938
name: label: maker
content: National Union Radio Corp.
notes: label: Description (Brief)
content: A 7-pin plastic base with top contact, BT-shaped envelope, aquadag internal coating. Stamped on base: "National Union / NU Made in U.S.A. / Long life tube _ complete / renewal service for all radios / Date sold [blank] Test date [blank] / MR"; on envelope: "6A7". Reference: https://www.radiomuseum.org/tubes/tube_6a7.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.323187
label: catalog number
content: 323187
label: accession number
content: 241556
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: heptode
label: Object Name
content: vacuum tube
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 1/2 in x 1 1/2 in; 11.43 cm x 3.81 cm