Moorhead / Marconi type VT / SE1444 "Amplifier" triode
date: label: date made
content: ca. 1918
label: date made
content: ca 1918
name: label: maker
content: Moorhead Laboratories
notes: label: Description (Brief)
content: A 4-pin base with metal shell and plastic insulator. Tipped T-shaped envelope. Vertically mounted filament inside a cylindrical collector. Stamped on envelope: "4772 / Moorhead / S.E. 1444 / S. F. California". In original box that includes packaging patents issued to Wallace Egg Carrier Co., 9 March 1915 and 18 September 1917. Printed: "Moorhead / Valves / for / Wireless / Telegraphy / & Telephone / Manufactured by / Moorhead / Laboratories / Inc. / San Francisco, California / U.S.A." Reference: Tyne, "Saga of the Vacuum Tube," pages 126-127, 173-178.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Estate of Dr. Ross Gunn, thru Mrs. Gunn
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.328380
label: catalog number
content: 328380
label: accession number
content: 271982
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: triode
physicalDescription: label: Physical Description
content: cardboard (box material)
label: Measurements
content: overall: 4 in x 1 3/4 in; 10.16 cm x 4.445 cm