Cable Radio type 227 "Speed" triode
date: label: date made
content: ca 1925
name: label: maker
content: Cable Radio Tube Corp.
notes: label: Description (Brief)
content: A 5-pin plastic base with S-shaped envelope, getter stain. Brand name “Speed”. Donor’s card reads: “Triode made by Cable Radio Tube Corporation, 84-90 North Ninth Street, Brooklyn, N.Y. before 1929. A so-called “bootleg tube” [i.e. unlicensed] of the early days of AM broadcasting. Interchangeable with the conventional type 227 heater style triodes used in early AC operated home receivers. Unusual design with a fine wire mesh plate. Heater: 2.5 volts at 1.75 amperes.” Cable Supply Co., later became Cable Radio Tube Corp. See also: https://www.radiomuseum.org/tubes/tube_227.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.324792
label: catalog number
content: 324792
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 1/2 in x 1 3/4 in; 11.43 cm x 4.445 cm