De Forest type 552 radio tube
date: label: date made
content: ca 1931
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Description (Brief)
content: A 4-pin brass base shell with red insulator, two stranded leads twisted together emerging from top, two stranded leads twisted together emerging from side. G-shaped envelope. Stamped on base: "de Forest / Type 552 / Licensed to extent / indicated on carton". Inked on two stem presses: "3037". Reference: https://www.radiomuseum.org/tubes/tube_552.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.322570
label: catalog number
content: 322570
label: accession number
content: 241556
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: triode
label: Object Name
content: electron tube
label: Object Name
content: radio tube
label: Object Name
content: vacuum tube
physicalDescription: label: Measurements
content: overall: 8 in x 3 3/4 in x 5 1/2 in; 20.32 cm x 9.525 cm x 13.97 cm