Set of 3 Bell type "A" transistors
date: label: Date made
content: 1949
name: label: maker
content: Bell Laboratories
notes: label: Description (Brief)
content: Cardboard card with three type "A" transistors. Each unit is a steel, cylindrical can with hole in one side, recessed top, two leads at right angles on bottom. The units are marked, respectively: "AM.1453", "AM.N.2714", "AN.1430". The transistors were used by the donor in 1949 in experiments to design a cathode ray tracer.
label: Description (Brief)
content: The donor, a Bell Labs engineer, reported: "I was part of an engineering support group for BB&S on a temporary assignment in 1949 to develop a device which would eliminate the extensive static measurements to characterize configurations of the early transistor designs. The Cathode Ray Tracer was my contribution and involved the original Type A Transistor. The work is covered by a Bell Telephone Laboratories Memo For File dated June 6, 1949 with the designation MM-49-3200-2, author J. A. Lehans."
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from J. A. Lehans
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1988.0811.01
label: accession number
content: 1988.0811
label: catalog number
content: 1988.0811.01
objectType: label: Object Name
content: Transistor
physicalDescription: label: Measurements
content: each transistor: 1.5 cm x .5 cm; 9/16 in x 3/16 in