Back in the 70's many of us scavenged our first Transistors from surplus computer cards. We went to great trouble to catalog the different boards so we could kn

Back in the 70's many of us scavenged our first Transistors from surplus computer cards. We went to great trouble to catalog the different boards so we could know what we were getting. see the old EEB magazine at: http://www.rochester-engineering.com/EEB/ http://www.rochester-engineering.com/EEB/