I just upgraded to the 5 lnb dish. I was wondering can I connect a hddvr,hd reciever, and a sd reciever to the 5 lnb dish without using a mutiswitch? If so which outputs do I use to connect each reciever? Does it even matter which ones I use? Also I can delete the sd reciever if that helps.
You can connect 4 coax leads to the 4 terminals of the 5LNB dish, without adding any other hardware. You can connect all the equipment you listed. Mixed SD + HD equipment is fine. The SD equipment just won't see the extra LNBs.
2-tuner DVRs need 2 coaxes - 1 for each tuner.
Each non-DVR receiver requires 1 coax.