Lansdale / Philco type 31 power triode
date: label: date made
content: ca 1932
name: label: maker
content: Lansdale Tube Company
notes: label: Description (Brief)
content: A plastic 4-pin base with domed envelope. Stamped on base: “Philco”, on envelope “31 / Made in U.S.A”. Donor’s card reads: “Power triode made by Lansdale Tube Company for the Philco Corporation. Dates from about 1932. Used in the output stage of battery operated radio receivers. Filament: 2 volts at .13 ampere. Operates as a Class A-1 audio amplifier with 180 volts on the plate, 30 volt negative control grid bias, for an output of .375 watts.”
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.324950
label: catalog number
content: 324950
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: 4 1/4 in x 1 1/4 in; 10.795 cm x 3.175 cm