RCA type UV202 "Radiotron" triode
date: label: date made
content: ca 1923
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: A 4-pin brass base, tipped S-shaped envelope. Air-cooled transmitting triode, popular with radio amateurs. Donor card reads: "Triode, made for the Radio Corporation of America and listed in their first catalog of tubes, dated 1 June 1922. A part of their original line of tubes. Known as a Radiotron. Five watt transmitting tube. A good oscillator also used as an audio frequency power amplifier. Two or more of these tubes were often used in parallel to increase the output of the transmitter, mostly on continuous wave telegraph. Negative grid bias up to 10 volts helped the tube action wen used as an audio power amplifier. Plate circuit drew 45 milliamperes at 350 volts as a transmitting oscillator. Filament: 7.5 volts at 2.35 amperes. Amplification factor 8, output impedance 4000 ohms. Cost $8.00 in 1922." See also: Tyne, "Saga of the Vacuum Tube," pages 325-326.
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.324350
label: catalog number
content: 324350
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Triode
label: Object Name
content: triode
label: Other Terms
content: Electron Tube, Triode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 5 in x 2 1/8 in; 12.7 cm x 5.3975 cm