Arcturus type 551 screen grid tetrode
date: label: date made
content: ca 1931
name: label: maker
content: Arcturus
notes: label: Description (Brief)
content: A 5-pin plastic base with top contact, screen grid, S-shaped blue glass envelope. Stamped on base: "Arcturus / - Type 551 - / Made in U.S.A." Printed near top: U with arrow pointing to the upper right. Reference: https://www.radiomuseum.org/tubes/tube_551.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 the United States Bureau of Standards, Dept. of Commerce
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.320194
label: catalog number
content: 320194
label: accession number
content: 188571
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: tetrode
physicalDescription: label: Measurements
content: overall: 5 in x 1 3/4 in; 12.7 cm x 4.445 cm