Title
Drum X select 4521C system building blockCatalog Number
102728225Type
Physical objectDescription
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.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 inCategory
Component/module
