Moorhead / Marconi type VT "Amplifier-Oscillator" tube
date: label: date made
content: ca 1920
name: label: maker
content: Moorhead Laboratories
notes: label: Description (Brief)
content: A 4-pin brass base shell with plastic insulator, tipped T-shaped envelope. Stamped on base: "De Forest Audion / U.S. Patent Nos. 841387-879532 / Sold only for Amateur / and Experimental use."; and "[?]298[?]" On envelope: "Patented / Sold only for Amateur & / Experimental use." Reference: Tyne, "Saga of the Vacuum Tube," pages 172-175.
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.322860
label: catalog number
content: 322860
label: accession number
content: 241556
objectType: label: Object Name
content: Electron Tube, Triode
label: Object Name
content: triode
label: Other Terms
content: Electron Tube, Triode; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 1/8 in x 1 5/8 in; 10.4775 cm x 4.1275 cm