It's a Winegard. I already removed the inside knob and a couple of pieces of plastic fell out. Looks like they broke off from the rooftop part of the assembly. Looked online and couldn't find any replacement parts. Winegard's website has a form for support but no answer yet. Amazon sells the whole thing, but I only need a part. Haven't tried PPL and Camping World is dead to me. I guess I'll hit up a local RV shop.
2018 Hurricane 29M
CHF, Saf-T-Plus, SumoSprings