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 shell with plastic insulator, tipped T-shaped envelope. "S" stamped on insulator. Stamped on envelope: "Moorhead Audion / San Francisco / 217957"; on base: "Marconi / [globe logo] / Trade Mark / Fleming Patent No 803684" and "De Forest Audion / U.S. Patent Nos. 841387-879532 / Sold only for Amateur / and 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 Fred C. Reed
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.310267.02
label: catalog number
content: 310267.02
label: accession number
content: 114467
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 in x 1 3/4 in; 10.16 cm x 4.445 cm