Marx made five different type of couplers between 1934 and 1974. If you’ve never seen Marx couplers explained before, here’s a primer on how to identify them and use them together. And I even have a few repair tips if you need them.
David Farquhar is a computer security professional, entrepreneur, and author. He started his career as a part-time computer technician in 1994, worked his way up to system administrator by 1997, and has specialized in vulnerability management since 2013. He invests in real estate on the side and his hobbies include O gauge trains, baseball cards, and retro computers and video games. A University of Missouri graduate, he holds CISSP and Security+ certifications. He lives in St. Louis with his family.