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CK722

CK722

First low-cost transistor available to the general public, introduced in 1953

The CK722 was the first low-cost junction transistor available to the general public. It was a PNP germanium small-signal unit. Developed by Norman Krim

CK722

2N107

Early germanium alloy-junction PNP transistor

electronic hobbyist market originally started with Raytheon's CK722 transistor. Like the CK722, it enjoyed a long-standing popularity. General Electric decided

2N107

History of the transistor

around the CK722 transistor were published in popular books and magazines. Raytheon also participated in expanding the role of the CK722 as a hobbyist

History of the transistor

History_of_the_transistor

RTX Corporation

American multinational aerospace and defense conglomerate

In the 1950s, Raytheon began manufacturing transistors, including the CK722, priced for and marketed to hobbyists. Under the direction of Thomas L.

RTX Corporation

RTX_Corporation

Transistor

Solid-state electrically operated switch also used as an amplifier

Manufacturers of devices may have their proprietary numbering system, for example CK722. Since devices are second-sourced, a manufacturer's prefix (like MPF in

Transistor

Norman Krim

as CK721 and CK722 HAS highest gain and lowest noise label as CK721 sell as audio amplifier lower gain and higher noise label as CK722 sell as hobby/experimenter

Norman Krim

Norman_Krim

Raytheon

U.S. defense contractor

In the 1950s, Raytheon began manufacturing transistors, including the CK722, priced and marketed to hobbyists. In 1961, the British electronics company

Raytheon

Alfred Powell Morgan

American electrical engineer

(New York: Grosset & Dunlap, 1948) How to Use Tools (New York: Arco, 1955) CK722 "USD58808S - Design por an instrument-mount por radiopanei - Google Patents"

Alfred Powell Morgan

Alfred_Powell_Morgan

Rufus P. Turner

American academic, engineer and author

Several of Turner's early transistor radio designs used CK722 transistors (pictured)

Rufus P. Turner

Rufus_P._Turner

Popular Electronics

American magazine (1954–1982, 1989–1999, in print)

become available to hobbyists) were expensive: the small-signal Raytheon CK722 transistor was US$3.50 in the December 1954 issue, while a typical small-signal

Popular Electronics

Popular_Electronics