Sylvania type 307-A beam power tube
date: label: date made
content: ca 1942
name: label: maker
content: Sylvania Electric Products Inc.
notes: label: Description (Brief)
content: Plastic 5-pin base, top contact, domed envelope. Base stamped “JAN 307-A / VT-225 / Sylvania / Made in U.S.A.”, envelope: “307 A”. Donor’s card reads: “Beam power tube made by the Sylvania Corporation for the US government during World War II. Similar to the RK-75. For transmitting use. Heater type: 5.5 volts at 1 ampere. For Class C radio frequency amplifier operation: 500 volts at 60 milliamperes on the plate, 250 volts on the screen, negative control grid bias 50 volts, for an output of 20 watts.” Vacuum pentode. See also: https://www.radiomuseum.org/tubes/tube_307a.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.324645
label: catalog number
content: 324645
label: accession number
content: 252994
objectType: label: Object Name
content: pentode
label: Object Name
content: vacuum tube
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 5 1/2 in x 2 in; 13.97 cm x 5.08 cm