high-voltage mercury rectifier (similar to type 866)
date: label: date made
content: ca 1930
name: label: maker
content: Weston
notes: label: Description (Brief)
content: A 4-pin plastic base with top contact, S-shaped envelope. Specks of mercury on inner bulb wall. Single-arch ribbon filament, disk-type cathode. Written on envelope: "40" and 25(2)". Similar in structure to an RCA type 866 rectifier tube. Reference: https://www.radiomuseum.org/tubes/tube_866.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 Weston Electrical Instrument Corp., thru John H. Miller
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.313312.02
label: catalog number
content: 313312.02
label: accession number
content: 181342
objectType: label: Object Name
content: Electron Tube, Diode
label: Object Name
content: rectifier
label: Other Terms
content: Electron Tube, Diode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 5 1/8 in x 1 3/4 in; 13.0175 cm x 4.445 cm