I have an 811 dish reciever. I am about 27 miles from my network stations. I recently placed a CM 4228 in my attic and get my fox affiliate(Uhf 50 ) at about64-65% CBS 69-72%. with stable pictures. nbc,pbs and wb (all uhf) however will show 49% and sometimes bump up and down but are not quite strong enough to lock in to get a picture. I just ordered a CM 7777 preamp to see if these stations will lock in. Just wondering if it will help? Just an aside, My Abc affiliate broadcasts vhf channel 9 and is 12 miles from me and 60 degree southwest of the other stations. I was unable to recieve it with just the 4228 so I placed a rabbit ears antenna roughly perpendicular to my cm 4228 right through the middle of my 4228 with antenna ends extending in front and back of the 4228, and attached the leads to where my balun for the 4228 attaches and now get Abc @ 74-78%.