RCA / Cunningham type 2A5 “Radiotron” pentode
date: label: date made
content: ca 1934
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: A 6-pin plastic base with domed envelope, getter stain. Marked: "RCA / Cunningham / Radiotron", and stamped: "Made in / 2A5 / U.S.A." Donor’s card reads: “Power amplifier pentode made by the Radio Corporation of America about 1934 or 1935. Heater type: 2.5 volts at 1.75 amperes. For use in the audio output stage of AC operated radio receivers. Plate circuit: 375 volts, 285 volts on the screen, and a 16 volt negative control grid bias for a power output of 4 watts.” See also: https://www.radiomuseum.org/tubes/tube_2a5.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.324531
label: catalog number
content: 324531
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 1/2 in x 1 3/4 in; 11.43 cm x 4.445 cm