neazoi
Advanced Member level 6

Hello, I have seen some vintage PCBs (60's-80's) that have completely round corners in their copper tracks layout.
How did they do it? did they use some kind of CAD software back then or just paint it by hand?
Any such CAD software available forgotten somewhere?
How did they do it? did they use some kind of CAD software back then or just paint it by hand?
Any such CAD software available forgotten somewhere?