Artifact Details

Title

CK725 Germanium transistor

Catalog Number

102757310

Type

Physical Object

Date

Date code: 517 (1955 week 17)

Manufacturer

Ratheon Semiconductor Division

Place Manufactured

US

Identifying Numbers

CK725

Dimensions

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

Description

Per Jack Ward, Transistor Museum -
"Raytheon CK725 (1 piece), germanium PNP alloy junction transistor. Highest gain performing version of the early CK7XX product line. Raytheon continued to improve the manufacturing processes for these early 1950s germanium transistors, and this resulted in high gain performance characteristics for some types, such as the CK725, which was introduced in 1954 – the more robust metal case version of this transistor type was released by Raytheon as the 2N65. Date code: 517 (1955, week 17). Rare - especially with the unusual yellow stamped labeling and the1955 date code; black epoxy cases were abandoned by Raytheon in this timeframe to the more robust metal case styles."

Category

Component/Semiconductor/transistor

Credit

Gift of Pat Belotti

Lot Number

X7957.2017