CECO pentode
date: label: date made
content: ca 1930
name: label: maker
content: C. E. Manufacturing Co.
notes: label: Description (Brief)
content: A 5-pin plastic base with side-mounted connecting screw and top contact. (Base loose.) S-shaped envelope. Mica insulator. Paper label: "C with e inside c with o inside [for Ceco] / Pentode". Donor's card reads: "Pentode made by the CeCo Manufacturing Co. of Providence, R.I. about 1929 or 1929. The first commercially available pentode. The first commercial application know to [me] was its use as a stage of radio frequency amplification used as the input to a Norden-Hauck "DX-5" regenerative AC operated radio receiver. Made in Philadelphia, with a "modernistic" panel design, plug-in coils, and extensive shielding, this was one of the first AC operated receivers using screen grid or pentode tubes for amateur use. The CeCo pentode was so based as to be interchangeable with the UX-224 screen grid tube, except that the pentode had one connection on the side of the base. Performance was about the same from each tube used interchangeably. Heater type (for AC operation) 2.5 volts at 1.75 amperes. Cost in 1930 was $10.00 each."
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.324401
label: catalog number
content: 324401
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: 5 in x 1 3/4 in; 12.7 cm x 4.445 cm