Modularelectronic.jpg (download)‎ (600 × 418 pixels, file size: 171 KB, MIME type: image/jpeg)

Stacked components printed onto small PC board interconnected on their edges.

The top thingee is where a tube plugged in (transistors were very expensive in the early days costing around $50 each) so tube were still used for a long time

Some consumer projects (radios  etc) used modules like these for fairly standard circuit configurations (like amplifiers or voltage regulators)

Seach for "Project Tinkertoy" on the Web

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current00:42, April 18, 2014Thumbnail for version as of 00:42, April 18, 2014600 × 418 (171 KB)Testxyz (wall | contribs)

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