Tron, I think it does use a standard C-120 flanged feedhorn. You can attach the LNB directly to the feedhorn without the OMT waveguide. I got this setup so I can use two separate LNBs. I wanted to use a Norsat or Cal Amp LNB, but the Zinwell LNBs work pretty damn good. The single polarity feed also accepts the LNB directly, just like the dual polarity feed. I could have put a Invacom Quad with waveguide input on the feed instead, but I wanted the OMT and seperate LNBs, so I could drive both LNBs with 18V.

turbosat, It's odd looking because you don't see a lot of Ku feedhorns, I suppose. I know I never see anything like this unless it's a Tx/Rx feed and OMT, and the Tx side is a lot bigger. Think of this like a C band dual output feedhorn, except for Ku. I get awesome signal quality with it, just like I did with the single polarity feed.