Cunningham type CX322 screen grid tetrode
date: label: date made
content: ca 1930
name: label: maker
content: E. T. Cunningham, Inc.
notes: label: Description (Brief)
content: A screen-grid tetrode for radio frequency amplification. Plastic 4-pin base with top contact, S-shaped envelope. Marked: "Cunningham / CX 322". Logo stamped on envelope. Two paper labels. One reads: "R338 / 36681", the other reads: "This tube has been tested and operated at normal voltages as specified on our tube carton, and found OK for service at these voltages. / E.T. Cunningham, Inc. / Service Division / Form 771". Reference: https://www.radiomuseum.org/tubes/tube_cx322.html.
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.322531
label: catalog number
content: 322531
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: vacuum tube
label: Object Name
content: tetrode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 5 in x 1 3/4 in; 12.7 cm x 4.445 cm