When you want to phase transformers, it’s good to know the common (in Lionel terms) or base (in American Flyer terms) post. It’s a shame that Marx didn’t label which of its posts was common. So here’s how to find the common post on a Marx transformer.
It’s a good thing this is fairly easy to figure out, because Marx transformers are dirt cheap. I bought one for exactly one dollar at the last train show I attended, and the vendor wanted to sell me a box full of them for $5.

David Farquhar is a computer security professional, entrepreneur, and author. He has written professionally about computers since 1991, so he was writing about retro computers when they were still new. He has been working in IT professionally since 1994 and has specialized in vulnerability management since 2013. He holds Security+ and CISSP certifications. Today he blogs five times a week, mostly about retro computers and retro gaming covering the time period from 1975 to 2000.






