RCA / Crosley type 7E7 twin diode, remote cutoff pentode
date: label: date made
content: ca 1940
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: An 8-pin metal base with center post, T-shaped envelope. Stamped: “Crosley / Electron Tube / Made in U.S.A.” Donor’s card reads: “Twin diode-remote cutoff pentode made by the Radio Corporation of America for the Crosley Corporation. Glass lock-in type used as a combined detector, amplifier and AVC tube in radio receivers. Similar to the type 89 tube [catalog number 324574], except in physical detail. Heater: 6.3 volts at .3 ampere.” See also: https://www.radiomuseum.org/tubes/tube_7e7.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.325144
label: catalog number
content: 325144
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: pentode
label: Object Name
content: double diode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 2 3/4 in x 1 1/8 in; 6.985 cm x 2.8575 cm