Artifact Details

Title

CK727 Germanium transistors

Catalog Number

102757311

Type

Physical Object

Date

Date code: 402 (1954 week 2)

Manufacturer

Ratheon Semiconductor Division

Place Manufactured

US

Identifying Numbers

Model number CK727

Dimensions

overall: 1/4 in x 2 in x 3 3/4 in

Description

The 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."

Category

Component/Semiconductor/transistor

Credit

Gift of Pat Belotti

Lot Number

X7957.2017