RCA / Cuningham type 57 "Radiotron" vacuum pentode
date: label: date made
content: ca 1932
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: A 6-pin plastic base with top contact, domed envelope. Stamped on base: "RCA Cunningham / Radiotron"; on envelope: "57". Internal aquadag coating on envelope. Donor’s card reads: “Sharp cutoff pentode made by the Radio Corporation of America. Used mostly as a biased detector in AC operated radio receivers. Heater type, 2.5 volts at 1 ampere.” See also: https://www.radiomuseum.org/tubes/tube_57.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 Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.324581
label: catalog number
content: 324581
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: pentode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 3/4 in x 1 1/2 in; 12.065 cm x 3.81 cm