RCA type UV204A transmitting triode
date: label: date made
content: ca 1931
name: label: maker
content: RCA Corporation
notes: label: Description (Brief)
content: RCA "Radiotron" UV-204-A air-cooled transmitting triode. Brass base shell with three connectors and ceramic insulator, top contact, cylindrical BT-shaped envelope. Stamped on base shell: "[RCA logo] / Radiotron / Model UV-204-A / 250 Watts / Patented / 24187 / Licensed only / For amateur Experimental / and entertainment use / and only to extent / indicated on attached notice / Serial 21207". Unit has two filament legs extending from the frame mount, the UV204 has only one. References: Tyne, "Saga of the Vacuum Tube," pages 327-328; https://www.radiomuseum.org/tubes/tube_uv204a.html.
label: Description (Brief)
content: Donor reported: "Commercial 250 Watt RCA 204-A Transmitter Triode audiotron. This was probably General Electric manufacture, as a refinement of their G. E. "P" tube . Used by Hammond in early 1930's in transmissions from Gloucester to the home of Hammond Sr, in Washington, now the French Embassy, Kalorama Road. The work is discussed briefly in the Sept. 1957 historical paper. In addition to proving to high officers of the U.S. Army the merits of the "Hammond System" as to noise reduction and reduction of fading at short wave lengths, the experiments proved that the Army could not read the messages received loud and clear by Hammond equipment, when the attempt was made with standard Army receiving equipment."
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from the Estate of John H. Hammond, Jr., thru The National Shawmut Bank of Boston
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.327510
label: catalog number
content: 327510
label: accession number
content: 266066
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: 14 1/4 in x 4 in; 36.195 cm x 10.16 cm