RCA type UV199 triode
date: label: date made
content: ca 1923
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: A brass base with four short pins and a tipped T-shaped glass envelope. Donor card reads: "Triode made for the Radio Corporation of America. Dry-cell operated 3 volt filament. Replaced the WD-11 and WD-12 tubes of the original RCA line of tubes. First used in quantities to introduce the first commercial made superheterodyne (RCA) broadcast receivers in 1923. A very sensitive detector, a fair radio frequency amplifier, and an inadequate audio amplifier. Announced at the New York Radio Show in December 1922, and were available in April 1923. Made by General Electric. Thoriated tungsten filament. In the fall of 1924, a black molded base was substituted for the brass shell base."
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.324338
label: accession number
content: 252994
label: catalog number
content: 324338
objectType: label: Object Name
content: triode
physicalDescription: label: Measurements
content: overall: 3 in x 1 in; 7.62 cm x 2.54 cm