One thing I noticed is he had the temp rather low. This is a common mistake made by beginners who don't know how to judge when a connection is hot enough to solder. Typically they apply the solder and the tip at the SAME time instead of heating the joint up for a few seconds at the right temp and then applying the solder. My guess is his problem is a combination of temp setting too low, not heating joint up long enough and removing iron before solder flows. With my weller , it's always the right temp.
The trick to good solder joints is using a hotter tip but holding on the point of contact for a SHORTER period of time
Yes!I agree old man.
He is a grandad you know
The trick to good solder joints is using a hotter tip but holding on the point of contact for a SHORTER period of time , as opposed to using a LOWER temp for a LONGER period of time.
My grandson takes karate
failure to systematically clean all surfaces using isopropyl alcohol