I had one HD receiver and three SD receivers in my home. They gave me a great offer a couple of years ago to switch to HD-DVR's but when Mastec came to the house they wanted to drill massive holes in my wooden floors and my wife went nuts so I put it on hold as by my reading of this forum I was led to believe that a single wire solution was coming. To make a long story short, I finally bit the bullet and after some judicious bargaining (and some testy emails), I was given what I considered a fairly good deal on two HD DVR's, one SD DVR and one HD receiver and I got a SWMline dish also so I would not have to run more than one wire. I suppose that having been a loyal customer since 1995 helped. I enjoyed the OTA channels, particularly the -2 from the local pbs station which had some terrific shows on it. Obviously I wanted to continue using OTA. The installer said he had nothing to do with OTA and that it would be a snap to hook up the AM21 when I got them from DirecTV. My question, which I am sure has been answered already but I can't find despite the search function is: Can I use the single cable run to each receiver or DVR to also carry the OTA signal or will I have to run another cable to each set, which would defeat the purpose of my having waited (ie one cable)? I now have three AM21's sitting in my living room and while I think I could manage to run an extra cable to one or two of the sets, the main set in the living room would be a nightmare. Can someone direct me to where this has been discussed or if it has not, even if it is not approved if it is at all feasible? If it is possible, I will try and I would appreciate some guidance on which splitters (diplexers?) to use. Thank you.