Cable Radio type 250 "Speed" power triode
date: label: date made
content: ca 1928
name: label: maker
content: Cable Radio Tube Corp.
label: maker
content: Cable Radio Tube Corp.
notes: label: Description (Brief)
content: A 4-pin plastic base with S-shaped envelope. Donor’s card reads: “Triode made ... during the late 1920s. Very likely this is a “Speed” brand made by Cable Radio Tube Corporation, 84-90 North Ninth Street, Brooklyn, N.Y. A so-called “bootleg tube” [i.e. unlicensed]. Interchangeable with the Cunningham type C-350 tubes. Heater: 7.5 volts at 1.25 amperes. 450 maximum plate volts, 80 volt negative control grid bias.”
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.324801
label: catalog number
content: 324801
label: accession number
content: 252994
objectType: label: Object Name
content: electron tube
label: Object Name
content: triode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 5 3/4 in x 2 1/2 in; 14.605 cm x 6.35 cm