TRANSISTOR MUSEUM™  

Historic Transistor Photo Gallery

Raytheon Blues – “Big Blues”

 

              

   

                

     

   Photo Courtesy Terry Hosking

 

 

Photo Essay Commentary

These photos illustrate several of the most unusual of the Raytheon Blues.  The top unit (CK750-1) is dated from late 1955 and is likely the first style of Raytheon power transistor.  The case is blue plastic with a brass strip inserted for heat dissipation.  The CK753 is a standard TO-3 case style power transistor, likely made in limited quantities.  The CK900, dated 1957, is most unusual. It is 3/8”  in diameter and 1  ¼” in length, and houses four separate germanium transistors.  Multiple leads allow connection to all the transistors.  The CK900 (and the smaller CK901) represent a little known and historic avenue of germanium transistor technology.  

 

 

Go To PhotoGallery Raytheon Blues Page 3

 

 

 

Copyright © 2005 by Jack Ward. All Rights Reserved.  http://www.transistormuseum.com/

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