I have a couple of older Futaba FG series radios with built-in trainer plugs. From what I have found so far, the older radios use a DIN-5 jack, different from today's radios. I have a trainer cord for the radios also, so I have the plugs. Is it possible to just solder on a USB plug to the trainer cord and use a radio as a controller, or is a little more complicated? I can solder, but I am no electrical engineer!

Thanks for your time.