Audiotron radio receiving tube
date: label: date made
content: ca 1914
name: label: maker
content: AudioTron Manufacturing Company
notes: label: Description (Brief)
content: Double-ended glass tube with insulated leads emerging from both ends, no base. Cylindrical envelope with paper label. Donor card reads: "Triode: a receiving tube with a double filament made on the West Coast in 1914 and later by the AudioTron Sales Company, headed by E. T. Cunningham. A very sensitive "soft" detector requiring variable "B" [battery] voltage, from 18 to 30 volts. Tungsten filament, 5 volts at 1 ampere. This tube forced Lee De Forest in March 1915 to bring out his "Model T" and to abandon the previous sales restrictions. Manufacturing facilities were crude, as shown [in comparison to catalog #324316] which is supposed to be identical."
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.324315
label: catalog number
content: 324315
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube, Triode
label: Object Name
content: delete
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: 3 3/4 in x 3/4 in; 9.525 cm x 1.905 cm