Artifact Details

Title

Drum X select 4521C system building block

Catalog Number

102728225

Type

Physical object

Date

1965 ca.

Manufacturer

Digital Equipment Corporation (DEC)

Place Manufactured

Maynard, Mass.

Identifying Numbers

Model number 4521C Etched in solder at insertion end of board
Other number 41521 Engraved on the outside of the frame on the extraction end
Serial number 0196954 Engraved on the side of the frame toward the extraction end

Dimensions

overall: 1/4 in x 4 1/2 in x 7 in

Description

The object consists of two symmetrically mounted groups of components with a capacitor and resistor between them and a common capacitor and resistor. Each half has five transistors two coils and other active and passive components. On the component side there are also three quality control stamps, one is barely visible. On the solder side there are lettered coordinates A-Z.

Category

Component/module