National Union type 35 / 51 screen grid tetrode
date: label: date made
content: ca 1933
name: label: maker
content: National Union Radio Corp.
notes: label: Description (Brief)
content: A 5-pin plastic base with top contact, two-layer screen grid, domed envelope. Stamped: "National Union Electric / J”, on envelope: “35 / 51 / Made in U.S.A.” Paper label reads: "At your service / Telephone / Kennedy's Radio / for prompt / radio service / COlumbia 10181". Reference: https://www.radiomuseum.org/tubes/tube_3551.html.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.320587
label: catalog number
content: 320587
label: accession number
content: 242374
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: tetrode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 5 in x 1 3/4 in; 12.7 cm x 4.445 cm