EIMAC type 4-W-300-B radial beam power tube
date: label: date made
content: 1961
name: label: maker
content: Eimac
notes: label: Description (Brief)
content: An 8-pin metal base with metal jacket and two plumbing tubes on top. Stamped: “Eimac / 4W300B / Made in U.S.A.” Donor’s card reads: “Radial beam power tube made by Eitel-McCullough and [donated] by Eimac in July 1961. One of the smallest water cooled tubes made. Electrically identical with the type 4-X-250-V air cooled tube. May be used at frequencies up to 500 megacycles. Heater type: 6 volts at 2.5 amperes, using an oxide coated unipotential cathode. For use as a Class C amplifier, plate circuit 1500 volts, 250 volts negative control grid bias, 2 watts of drive, will deliver 235 watts of output power.” See also: https://www.radiomuseum.org/tubes/tube_4w300b.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.325232
label: catalog number
content: 325232
label: accession number
content: 252994
objectType: label: Object Name
content: electron tube
label: Object Name
content: vacuum tube
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 3 1/2 in x 1 3/4 in x 1 1/2 in; 8.89 cm x 4.445 cm x 3.81 cm