RCA type 247 power amplifier pentode
date: label: date made
content: 1935
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: A 5-pin plastic base with S-shaped envelope. Donor card reads: "Power amplifier pentode made by the Radio Corporation of America. Glass type used in audio output stage of radio receivers. Filament type AC or DC: 2.5volts at 1.75 amperes. Plate and screen operate at 250 volts, 4 volt negative control grid bias for DC filament operation. Dates from 1935."
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.324477
label: catalog number
content: 324477
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: vacuum tube
label: Object Name
content: pentode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 5 1/4 in x 2 in; 13.335 cm x 5.08 cm