



N couple question (help identity)
I acquired several of these connectors over the weekend at an estate sale. They are N male to N female, but there’s one unique thing I’ve never seen. The halves thread together and the female side isn’t just a barrel connector; it’s got a solid center conductor that slides into the male side. There’s a locking ring on the outer part that makes it look like it’s tunable to optimize SWR. Is this a common connector? Anyone know what the part number is? I’ve never seen these before.
Thanks in advance!