National Unon type NY224 screen grid tetrode
date: label: date made
content: ca 1930
name: label: maker
content: National Union Radio Corp.
notes: label: Description (Brief)
content: A plastic 5-pin base with top contact, S-shaped envelope. Stamped on base: "National / Union / -- NY-224 --"; partial paper label on envelope: "Date [lost] Ser [lost] / Set [blank] Ser. No. [lost] / Code [blank] / Important Replacem[ent ...] / be made if this label [....] / refaced or altered." Reference: https://www.radiomuseum.org/tubes/tube_ny224.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.320614
label: catalog number
content: 320614
label: accession number
content: 242373
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: tetrode
physicalDescription: label: Measurements
content: overall: 1 7/8 in x 1 3/4 in; 4.7625 cm x 4.445 cm