TRANSISTOR MUSEUM™  

Historic Transistor Photo Gallery   

 

 

CBS HYTRON

1N81 GERMANIUM

 CRYSTAL DIODE 

Page 2

 

At left are photos of additional CBS semiconductor packaging styles from the 1950s.  The top package is a “matchbook” foldover style from 1954, and contains a brown phenolic plastic 1N64.  The center package has a snapped opening tab, and contains a small glass 1N64.  The lower package is a “matchbook” foldover style, and contains a small glass 1N99.  Most CBS 1950s semiconductors are easily recognizable from the unique and colorful packaging used by this notable company.

 

This is a section of the “CBS Transistors and Diodes” page of the 1960 2nd edition of the Lafayette Radio Semiconductor Directory.  Although offering a wide range of germanium products (including the 1N81) in this catalog, CBS soon exited the semiconductor business.

EVOLUTION OF CASE STYLES

Shown above are three examples of the evolving case styles of 1N81 throughout the 1950s.  At left is an early 1950s GE device, which is somewhat crudely made and not hermetically sealed.  The CBS device (from the mid 1950s) has a very robust phenolic plastic case, suitable for military use. At right is a modern 1960s hermetically sealed glass device from Transitron.     

Copyright © 2008 by Jack Ward.  All Rights Reserved.

http://www.transistormuseum.com