Is there a simple way to DIY a coaxial male connector?
I have used soldered multithreaded copper wire for central connector (the pin) and stripped, unsoldered wire wound around and secured by electrical tape on the barrel. That is, before I can get a suitable connector. Even better is to strip off the plug and connect the wires. I'd rather do that that start building a connector. I could try a piece of bent metal sheet as the connector for the barrel. Hint: it doesn't need to be all around the barrel, just touch at some point along the barrel.