Philips type B-442 tetrode
name: label: maker
content: Philips
notes: label: Description (Brief)
content: A plastic 4-pin base (banana pins) with top contact, silvered S-shaped envelope. Stamped “B442”. Donor’s card reads: “Tetrode made by Philips of Holland. Used as a Class A radio frequency amplifier. Heater type: 4 volts at 1 amp. Plate 200 volts, 100 volts on the screen, 1.3 volt negative control grid bias.” See also: https://www.radiomuseum.org/tubes/tube_b442.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.324739
label: catalog number
content: 324739
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: 4 3/4 in x 1 3/4 in; 12.065 cm x 4.445 cm