TitleCK727 Germanium transistors
DateDate code: 402 (1954 week 2)
ManufacturerRatheon Semiconductor Division
Dimensionsoverall: 1/4 in x 2 in x 3 3/4 in
DescriptionThe object consists of three pieces that were high performance transistors.
Per Jack Ward, Transistor Museum -
"Raytheon CK727 (3 pieces), germanium PNP alloy junction transistors. Low noise version of the CK721. Raytheon continued to improve the manufacturing processes for these early 1950s germanium transistors, and this resulted in low noise performance characteristics for some types, such as the CK727, which was introduced in 1954. Date code: 402 (1954, week 2). Rare - These units represent a very early production run of the CK727, from the second week of 1954."