Raytheon type B full-wave rectifier
date: label: date made
content: ca 1927
name: label: maker
content: Raytheon Company
notes: label: Description (Brief)
content: A 4-pin base with brass shell and ceramic insulator. Tipped S-shaped envelope. Maker's stamping on base is faded but reads in part: "Raytheon / Reg. U.S.[...] / Type B [....] Patented / June 24, 1924; [....] / Feb. 8, 192[6?] Others Pending / Raytheon Mfg. Co[mpany] / Cam[bridge Mass]"; serial number "53214". 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.
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.321183
label: catalog number
content: 321183
label: accession number
content: 241556
objectType: label: Object Name
content: Electron Tube, Diode
label: Object Name
content: 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 1/4 in x 1 3/4 in; 10.795 cm x 4.445 cm