McCullough / Kellogg type 401 "heater" triode
date: label: date made
content: ca 1926
name: label: maker
content: Kellogg Switchboard and Supply Company
notes: label: Description (Brief)
content: A 4-pin plastic base with 2-contact top cap, getter flash, tapered envelope. Top contacts are threaded and have hex huts for making connections. Base stamped: "Kellogg / Type - 401 / A-C tube". Shaw stamping on bottom of base; also "RK1". Reference: https://www.radiomuseum.org/tubes/tube_401.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.RSN79833U04
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: triode
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 1/4 in x 1 1/4 in; 13.335 cm x 3.175 cm