A Rotary Converter and the Power Historian

One of the joys of running this site is getting the chance to meet interesting people. When researching the supposed Nazi sabotage of Grand Central’s sub basement known as M42, I encountered a video on YouTube showing one Robert Lobenstein—identified as the retired General Superintendent of Power Operations at New York City Transit—starting up an old rotary converter. I had seen rotary converters before, the very ones in Grand Central’s M42, in fact. Yet I had never seen one in operation, and the video fascinated me. It was clear that the modern static frequency converters I had encountered on filming...