Moorhead / De Forest type ER triode, later type
date: label: date made
content: ca 1921
name: label: maker
content: Moorhead Laboratories
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. Extended anode. "S" molded on base insulator, "[ER 214]575" stamped on envelope; no stamp on base shell. Reference: Tyne, "Saga of the Vacuum Tube," page 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 Franklin Wingard
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.322849
label: catalog number
content: 322849
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 1/4 in x 1 3/4 in; 10.795 cm x 4.445 cm