I had a Dish500 setup with dual legacy LNBs on it. I want to add sat 121 so I eBayed for a Ku Band LNB (to install on my extra dish), DP34, and a DishPro LNBF (since the DP34 will only work with DishPro LNBFs). I am using two 301 irds.
When I swapped out the old legacy LNBs with the DishPro...