I love old instructional video like this. The narrator always sounds enthusiastic and motivating. The fact provided is also brief and easy to understand.
This short instructional video about AC arc welding is from 1944. It discusses the advantages of AC vs. DC arc welding and how arc blow (caused by magnetic disturbances) is minimized with AC.
Variables discussed include, current setting, the speed of travel, length of arc, angle of electrode.
