Title
CK739 Germanium diodesCatalog Number
102757314Type
Physical ObjectDescription
The object consists of two pieces.Per Jack Ward, Transistor Museum -
"Raytheon CK739 (2 pieces), germanium gold bonded diodes. Mid-1950s. Raytheon was a major manufacturer of germanium diodes, starting in the early 1950s. Mastering this technology allowed Raytheon to quickly move into mass production of germanium junction transistors, as the manufacturing processes were similar. Many of these 1950s Raytheon devices used the proprietary “CK” numbering system. The devices in this lot were sold as computer switching diodes, and use the unique black epoxy case characteristic of Raytheon early 1950s semiconductors. By 1955, Raytheon relabeled this diode type with the industry standard “1N305” equivalent id and a more robust metal case style. Date code: 420 (1954, week 20). Rare to Common - early black epoxy case style and proprietary “CK” numbering approach was used for Raytheon diodes for a short time only, with low volume production."
Date code: 420 (1954 week 20)
Date
1954Manufacturer
Ratheon Semiconductor DivisionPlace Manufactured
USIdentifying Numbers
| CK739 |
Dimensions
overall: 1/4 in x 2 in x 3 3/4 inCategory
Component/diodeCollection Title
The Paul Sullivan Collection of Early SemiconductorsCredit
Gift of Pat Sullivan BelottiLot Number
X7957.2017
