I travel to Arizona alot and had Direct Hd put in my house in southern California, recently. The install told me I could use an old dish I had and take one of the standard reciever boxes and put it in my motorhome and it would work OK. I tried it and I could'nt get a signal. Even when I set it up the others in the area. I think the LNB is bad. Would I be better of to get a 3 LNB or a 5 since I need a new dish anyway. I don't quite understand how it all works but I think my old dish will only pick up one satelite. What are the avantages of a 3 or 5 over my old one. The recievers I have are Standard reciever model D12. and advise would be helpful as I am completely new to the whole satelite Tv thing. Thanks JVB