Correct me if I have this all wrong, but isn't the idea to end up with a 3
mini coax thing DEC plug on one end and 3 plain BNC on the other?
Those old 3w3 cables are NOT hard to find. Starting from a plain BNC cable
does not strike me as the best route. Maybe I will dig a couple out of the
cable junk and put them on eBay so I can retire.