I have been doing FTA for a little over a year, but I am not sure what COB stands for. I will look it up. I live in Central Fl. and hit NSS 806 with my 10 ft. dish and a BSC621-2 C/Ku LNBF. I insert my dielectric plate and pick up anywhere from 74 to 114 channels. The biggest problem is the majority of them are scrambled.