Eveready-Raytheon type ER247 vacuum pentode
date: label: date made
content: ca 1935
name: label: maker
content: Eveready Raytheon
notes: label: Description (Brief)
content: A 4-pin plastic base with S-shaped envelope, getter stain. Base stamped: "Eveready / Raytheon / ER247"; paper label reads: "Eveready / Raytheon / 4-Pillar / Radio Tube / 122". Reference: https://www.radiomuseum.org/tubes/tube_er247.html.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: ZZ.RSN79817U04
objectType: label: Object Name
content: pentode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Physical Description
content: composition (overall material)
label: Physical Description
content: glass (overall material)
label: Physical Description
content: metal (overall material)
label: Measurements
content: electron tube: 5 1/2 in x 2 in; 13.97 cm x 5.08 cm