Sylvania type 4-CX-250-B radial beam tetrode
name: label: maker
content: Sylvania Electric Products Inc.
notes: label: Description (Brief)
content: An 8-pin metal base with heat sink and top cap. Stamped: “Sylvania / 4-CX-250-B / Made in U.S.A. Donor’s card reads: “Radial beam tetrode made by the Sylvania Corporation. From television station WJXT, Jacksonville, Fla., courtesy of Robert Reid, Chief Engineer. A compact forced-air cooled, external anode radial beam tetrode with a maximum plate dissipation of 250 watts and a maximum power input of 500 watts. Also known under the designation type 7203. All metal and ceramic construction. Heater type: 6 volts at 2.5 amperes. For use in frequencies up to 500 megacycles. Typical operation at 500 mc, 2000 volts on the plate, 300 volts on the screen, -90 volts on the control grid, 2 watts drive.” See also: https://www.radiomuseum.org/tubes/tube_4cx250b.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.325313
label: catalog number
content: 325313
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: tetrode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 2 1/2 in x 1 3/4 in; 6.35 cm x 4.445 cm