EARLY TRANSISTOR HISTORY AT MOTOROLA An Interview with Ralph Greenburg  Historic Semiconductor Devices and Applications
	Shown at left are examples of 1950s Motorola germanium transistors.  Ralph discusses each of these types in the Oral History, and provides a real “hands-on” perspective.  At far left is an early 1950s EP-7 point contact prototype.  Next is an XN-1 alloy junction device, mentioned by Ralph as the basis for the first transistor circuit applications work.  The blue unit is an experimental “stud type” power transistor, predecessor to the very successful “diamond-shaped” TO-3 style which was Motorola’s first large scale commercial semiconductor product – the 2N176 (1958, week 52) is an example of this product type.
Above is a September 15, 1964 Photo of Ralph Greenburg.  At this time, Ralph was the manager of the Applications Engineering Department of Motorola’s Semiconductor Division.  Go To Greenburg Oral History, Page 7
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