i believe the oval shape of the thru hole allows the solder and flux and iron to penetrate… basicly you are soldering a thru hole connection… the small round via will not wick the solder as good… also i assume you can use surface mount technology
i believe the oval shape of the thru hole allows the solder and flux and iron to penetrate… basicly you are soldering a thru hole connection… the small round via will not wick the solder as good… also i assume you can use surface mount technology