TRANSISTOR MUSEUM  

Historic Transistor Photo Gallery   

 

 

Transistor Size (5/16”L X 3/16”W X 5/16”H)

Date Code 12-53 (Month 12, 1953) on Back

Color Code (Grey, Green, Grey = 1858)

Packaging - None

 

 

 

WESTERN ELECTRIC 1858

 

TYPE

Germanium NPN Grown Junction

 

USAGE

Voice and Carrier Frequency

  Telephone Equipment

 

DATE INTRODUCED

1953

 

CASE STYLES

Silver Metal

 

AVAILABILITY

Rare (Limited Production)

 

HISTORIC NOTES

One of the first documented production uses of transistors was in the telephone carrier systems manufactured and installed by Western Electric.  The WECO Allentown Laboratory was active in studying the widespread use of the new transistor technology that had been developed at Bell Labs.  For example, the February 1958 Bell Laboratories Record publication contains the article “Transistors for Rural Telephone Systems”, which documents the use of the 1858 Western Electric transistor (shown above) in an early field trial of transistors in carrier equipment. The testing was done on a system installed in 1953/54 in Americus Ga.   The results of the testing proved largely satisfactory, with follow on deign improvements required for the 1858 – this led to the development and release of the Western Electric types 4B and 4C transistors, which were used in the production version of the carrier system.   

 

 

 

 

Copyright © 2004 by Jack Ward

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