The reason analog switches were on hand

Title: The reason analog switches were on hand
Description: An old schematic shows the analog switches being used. This is circa 1982 (according to the schematic).
File name: DCP_0204.JPG
Owner: David Caldwell
Dimensions: 2448 x 1632 px

An old schematic shows the analog switches being used. This is circa 1982 (according to the schematic).