RCA type 905 CRT
date: label: date made
content: ca 1932
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: A 5-pin plastic base with 4 side contacts, glass bell, phosphored end. Donor’s card reads: “Cathode ray tube made by the Radio Corporation of America before 1933. Used extensively in early oscilloscope monitors of broadcasting stations. Clear envelope, #1 green fluorescence. Heater: 2.5 volts at 2.1 amperes. 2000 volts on anode #2, Anode #1 400 volts (focusing electrode), negative grid bias for cutoff 35 volts.” See also: https://www.radiomuseum.org/tubes/tube_905.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.325048
label: catalog number
content: 325048
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: cathode ray tube
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 16 1/4 in x 5 in; 41.275 cm x 12.7 cm