Eveready Raytheon type ER224A tetrode
date: label: date made
content: ca 1930
name: label: maker
content: Eveready Raytheon
notes: label: Description (Brief)
content: A 5-pin plastic base with top contact, screen-mesh grid, and S-shaped envelope. Getter stain. Stamped on base: "Eveready / Raytheon / -ER224A-". Paper label reads: "Eveready / Raytheon / This tube is interchangeable / with all 224 and -24 tubes. / Dealer's name [blank] / Date installed [blank] Date removed [blank] / National Carbon Company, Inc." Reference: https://www.radiomuseum.org/tubes/tube_er224a.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.320339
label: catalog number
content: 320339
label: accession number
content: 242269
objectType: label: Object Name
content: vacuum tube
label: Object Name
content: tetrode
physicalDescription: label: Measurements
content: overall: 4 3/4 in x 1 5/8 in; 12.065 cm x 4.1275 cm