Raytheon type B full-wave rectifier
date: label: date made
content: ca 1927
name: label: maker
content: Raytheon Company
notes: label: Description (Brief)
content: Helium-filled half-wave rectifier. A 4-pin base with brass shell and ceramic insulator. Tipped S-shaped envelope. Maker's stamping on base reads: "Raytheon / Type B Patented / June 27, 1922 July 7, 1925 / Other Patents Pending / Raytheon Mfg. Company / Cambridge Mass."; serial number "0944". Two ceramic-covered cylinders are set side by side on top the stem press. A metal top hat is mounted above the cylinders with metal tines that are attached to the stem below the press. Reference: https://www.radiomuseum.org/tubes/tube_b_raytheon.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 Susan Horle
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.313970
label: catalog number
content: 313970
label: accession number
content: 195337
objectType: label: Object Name
content: Electron Tube, Diode
label: Object Name
content: diode
label: Object Name
content: rectifier
label: Other Terms
content: Electron Tube, Diode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 3/8 in x 1 7/8 in; 11.1125 cm x 4.7625 cm