RCA type 3Q4 pentode
date: label: date made
content: ca 1941
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: A 6-pin glass base with tipped T-shaped envelope. Miniature tube. Donor’s card reads: “Pentode made by the Radio Corporation of America for use as an output tube in “3-way” operated portable radio receivers. Filament center tapped for either 2.8 or 1.4 volts at .05 or .1 ampere, respectively. Plate voltage 90 volts with a 4.5 volt negative control grid bias will deliver about .25 watt of audio power.” See also: https://www.radiomuseum.org/tubes/tube_3q4.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.324933
label: catalog number
content: 324933
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: pentode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 2 1/4 in x 5/8 in; 5.715 cm x 1.5875 cm