Federal Telegraph type FT-363-A power triode
date: label: date made
content: ca 1927
name: label: maker
content: Federal Telephone & Telegraph Co.
notes: label: Description (Brief)
content: A transmitting triode with large heat-sink on the bottom, two stranded copper leads with ceramic-bead insulators, exhaust tube opens thru the side of the stem as with the Jaeger type of lamp tubulation. Side mounted contact. Paper label: "Federal Telegraph Company / Type F-363-A." Donor’s card reads: “Power triode made by the Federal Telegraph Company. Used in the WCAU AM transmitter at Newtown Square in 1927 or 1928. Interchangeable with the RCA type 863 [catalog number 324703].This tube ran for 21,455 hours before the filament emission fell below a satisfactory level. Given to [me] in 1938 by John G. Leitch, Chief Engineer, WCAU. Tungsten filament: 22 volts at 60 amperes. For Class C operation in radio frequency service up to 1.5 megacycles; 10000 volts on the plate at 1 ampere, for an output of 8 to 9 kilowatts.”
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.324826
label: catalog number
content: 324826
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Triode
label: Object Name
content: triode
label: Other Terms
content: Electron Tube, Triode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 19 3/4 in x 7 in x 4 in; 50.165 cm x 17.78 cm x 10.16 cm