RCA type 77 sharp cutoff pentode
date: label: date made
content: ca 1943
name: label: maker
content: Radio Corporation of America
notes: label: Description (Brief)
content: A 6-pin plastic base, top cap, domed glass envelope. Stamped: “[RCA logo] / Made in U.S.A. / U.S.N. / CRC 77”. Donor’s card reads: "Sharp cutoff pentode made by the Radio Corporation of America for the US government during World War II. Interchangeable with but physically much different from the type 77 RCA / Cunningham tube [catalog number 324655]. Also interchangeable with metal type 6-J-7. Glass octal type used as a biased detector or high gain amplifier in radio receivers. Heater type: 6.3 volts at .3 ampere.
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.324987
label: catalog number
content: 324987
label: accession number
content: 252994
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: pentode
label: Other Terms
content: Electron Tube; Electron Tubes
physicalDescription: label: Measurements
content: overall: 4 1/2 in x 1 1/2 in; 11.43 cm x 3.81 cm