ADL makes circular
C-band feedhorns (Mike Kohl at Global sells them), but they are very expensive. Even the manual ones that don't switch polarities are over $200, and the ones that switch are twice that. For something that expensive, it seems like unless you are doing more than just casual viewing, if you already have a linear C-band feed, it seems like the teflon slab approach makes most sense. I'm sure that a dedicated circular feed gives better results, but then you'd lose performance on linear sats, whereas if you get one of the teflon slabs, if you decide you'd rather go back to linear, you just pull it out. It will be interesting to see what the price/specification of this new lnbf are, but to me, it seems like unless it does linear too, that it is a lot of expense for minimal gain of capability. I'm not sure what's on those sats, so I don't know if it's worth it. I used to be able to see to about 30 deg over the Atlantic before a maple tree got in the way (and I don't cut maple trees because I like syrup more than TVRO), but the trees have grown up, and now I can only see 2 or 3 of the Atlantic sats, so it isn't worth it to me. But circular feeds are available if you think it's worth the expense.