TRANSISTOR MUSEUM

Historic Transistor Photo Gallery

 

 

 

Transistor Size (7/16 Diameter X 5/16H)

Date Code 743 (1957 Week 43) on Back

 

 

Plastic Tube

Some Plastic Tubes Have No Markings

 

 

GE 2N123

 

TYPE

Germanium PNP Alloy Junction

Hi Frequency

 

USAGE

Industrial/Military/Computer

 

DATE INTRODUCED

1955

 

CASE STYLES

Black Metal TopHat Pinched Top (Early)

 

AVAILABILITY

Common (Volume Production)

 

HISTORIC NOTES

The 2N123 was an early entry by General Electric in the industrial/military/computer market for reasonably high performance (for the time) and reliable germanium transistors. This device was rated at 8MHz switching frequency, which made it suitable for computer a RF applications. For reliability, it used the unique hermetically sealed and evacuated metal case design common to early GE transistors. The high purchase price of this device limited its use in commercial applications, but the military used it in large numbers. The 2N123 sold for approximately $5.50 throughout the late 1950s, and was listed in a variety of electronics catalogues. It was superceded by better performing germanium and silicon types in the 1960s.

 

 

 

 

 

Copyright 2004 by Jack Ward

http://www.transistormuseum.com