Moorhead / De Forest type ER triode
date: label: date made
content: ca 1919
name: label: maker
content: De Forest Radio Telephone & Telegraph Co.
notes: label: Description (Brief)
content: Moorhead laboratories "Electron Relay" or ER tube. A 4-pin base with brass shell, plastic insulator, tipped T-shaped envelope. Dull-sheen anode. Stamped on envelope: "For amateur and experimental use only. ER 54300". GE Collection No. "336" written on tube twice, "426" crossed thru on paper label. Tipped, clear envelope, 4-pin base with brass shell, plastic insulator. "Probably made by Moorhead in California by agreement with De Forest, but see Tyne's Saga of Vacuum Tube, March 1945 issue of Radio News." Reference: Tyne, "Saga of the Vacuum Tube," pages 174-176.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from General Electric Research Laboratory, thru W. C. White and J. R. Morgan
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.315629
label: catalog number
content: 315629
label: accession number
content: 220105
label: collector/donor number
content: 336
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 3/4 in; 10.4775 cm x 4.445 cm