General Electric type UX171 triode
date: label: date made
content: 1926
name: label: maker
content: General Electric Company
notes: label: Description (Brief)
content: A 4-pin plastic base with S-shaped envelope, partly silvered. Stamped on base: "Radiotron / UX 171". Paper label reads: "For use in / last audio / stage only". Donor card reads: "Triode made for the Radio Corporation of America by the General Electric Company in 1926. Developed for use in the audio output stage of early AM broadcast receivers. The first of a number of such tubes requiring a relatively high negative grid bias voltage. Thoriated tungsten filament: 5 volts at .5 ampere. Could be used with 90 volts on the plate and 19 volt negative grid bias, or 180 volts on the plate and 43 volts negative grid bias. A very satisfactory audio output tube with a rating of 1 watt. This tube was an excellent detector with about 22 volts on the plate. First used in the Brunswick phonograph in October 1925, but not released for sale until June 1926." See also:Tyne, "Saga of the Vacuum Tube," pages 315-316; https://www.radiomuseum.org/tubes/tube_x171.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.324380
label: catalog number
content: 324380
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: 4 3/8 in x 1 3/4 in; 11.1125 cm x 4.445 cm