Sears type 33 “Silvertone” power pentode
date: label: date made
content: ca 1931
notes: label: Description (Brief)
content: A 5-pin plastic base with mica insulator, domed envelope. Stamped on base: "Super / Silvertone / Made in U.S.A."; on envelope: "33". Donor’s card reads: “Power pentode made for the Sears, Roebuck & Company in the 1930s for use in their Silvertone line of radio receivers. Used in the output stage of battery operated receivers. Filament: 2 volts at .26 ampere, 180 volts on the plate and screen, 18 volts negative control grid bias. Output 1.4 watts.” See also: https://www.radiomuseum.org/tubes/tube_33.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.325018
label: catalog number
content: 325018
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: 4 1/2 in x 1 3/4 in; 11.43 cm x 4.445 cm