I'm also a ham radio operator. Heck, for years I've used DIN adapters, coax cable adapters, etc. Hopefully these guys can help out. I opened up the old connector and made note of the wiring. Later I'll do the same with the connector on the new coil cable. Kellyco may have something. Surely there are other owners that have had the same problem. Maybe someone on the forums will know what to do. I'll let you know how things go. In Mississippi the old GTAX 1000 hit on a grape shot ball about a foot deep. I want to get the old machine back up and running. It was a faithful detector for 20 years.