RCA / Cunningham type 81 “Radiotron” half-wave vacuum rectifier
name: label: maker
content: RCA Corporation
notes: label: Description (Brief)
content: A 4-pin plastic base with domed envelope. Stamped on base: “Cunningham / Made in U.S.A. / Radiotron / Licensed / as indicated / on carton.” Donor’s card reads: “Half-wave vacuum rectifier made by the Radio Corporation of America. Glass type, used in the power supply of AC operated Radio receivers. Filament type: 7.5 volts at 1.25 amperes. Output 85 milliamperes at 400 volts.”
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.324638
label: catalog number
content: 324638
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Diode
label: Object Name
content: rectifier
label: Other Terms
content: Electron Tube, Diode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 5 3/4 in x 2 1/4 in; 14.605 cm x 5.715 cm