RCA / Cunningham type 24A “Radiotron” sharp cutoff tetrode
date: label: date made
content: ca 1932
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: A screen grid tetrode. Plastic base with 5 pins, top contact, domed envelope. Base marked: "RCA / Cunningham / Radiotron / L 12" and "Licensed only to extent indicated on carton". Envelope stamped: "Made in / 24A / U.S.A.". Donor’s card reads: “Sharp cutoff tetrode made by the Radio Corporation of America. Early 5-pin model, a revision of the original type 24 tube [catalog number ], also referred to as UX-224. The 24-A model dates from 193.. Heater: 2.5 volts at 1.75 amperes. Maximum 250 volts on the plate and 90 volts on the screen See also: https://www.radiomuseum.org/tubes/tube_24a.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 Paul G. Watson
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.325035
label: catalog number
content: 325035
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: tetrode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 3/4 in x 1 3/4 in; 12.065 cm x 4.445 cm