RCA type 4-X-500-A tetrode
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: A glass cylinder with a ventilated metal heat sink on the bottom, four contact pins on top. Metal band around top of cylinder. Donor’s card reads: “Tetrode made by the Radio Corporation of America for use in radio and television transmitters in the VHF range, both AM and FM types of emission. Forced air cooling. From the WCAU-TV transmitter. Thoriated tungsten filament: 5 volts and 13.5 amperes. Class C operation for continuous wave or FM telephony: Plate 3000 volts at .6 ampere, #2 grid 500 volts, #1 grid 200 volts negative bias. Maximum output 660 watts up to 110 megacycles.”
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.325047
label: catalog number
content: 325047
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 1/2 in x 2 1/2 in; 11.43 cm x 6.35 cm