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
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