John Firth type 226 "Royal Tube / Bunckingham" vacuum triode
date: label: date made
content: ca 1928
name: label: maker
content: John Firth & Co.
notes: label: Description (Brief)
content: An audio frequency vacuum triode in RCA type UX-226 box. A 4-pin plastic base with tipless S-shaped envelope, partly silvered. Stamped on base: "226 / "Royal Tube" / "Buckingham" / John Firth, New York"; paper label on envelope "2" is set on top of a maker's stamp. References: Tyne, "Saga of the Vacuum Tube," page 319; https://www.radiomuseum.org/tubes/tube_226.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 Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.241556.805
label: accession number
content: 241556
label: catalog number
content: 241556.805
objectType: label: Object Name
content: triode
physicalDescription: label: Measurements
content: tube: 4 3/8 in x 1 3/4 in; 11.1125 cm x 4.445 cm
label: Measurements
content: box: 5 in x 2 1/4 in x 2 1/4 in; 12.7 cm x 5.715 cm x 5.715 cm
label: Measurements
content: overall: 4 1/2 in x 5/8 in; 11.43 cm x 1.5875 cm