Radiotron type 869A rectifier
date: label: date made
content: ca 1930
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: A half-wave mercury-vapor rectifier with one socket. Plated three-pin base with ceramic insulator, top contact, spherical BT-shaped envelope. Mercury pooled inside and deposited on inner structures. Stamped on base shell: "[RCA logo] / Radiotron / 869A / Made in U.S.A. / Licensed / as Stated / on Carton / 14851". Bottom socket has copper contacts and a slate (?) base. No extant Bureau of Standards property numbers. Reference: https://www.radiomuseum.org/tubes/tube_869a.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 the United States Bureau of Standards, Dept. of Commerce
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.320216
label: catalog number
content: 320216
label: accession number
content: 188571
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: vacuum tube
label: Object Name
content: rectifier
physicalDescription: label: Measurements
content: overall: 15 3/4 in x 5 in x 5 in; 40.005 cm x 12.7 cm x 12.7 cm
label: Measurements
content: tube: 14 3/4 in x 5 in; 37.465 cm x 12.7 cm
label: Measurements
content: socket: 2 1/8 in x 3 3/8 in x 2 in; 5.3975 cm x 8.5725 cm x 5.08 cm