Dish Tailgater System Dropping Channels

Thank you to all for the replies. Correct I have never been able to get Sat 129. I have chnaged cables and eliminated the trailer wiring to get stronger signal strength, with no success. I just spend over an hour on the phone with Control Antenna tech support, and another hour Sunday with Dish Tech Support. Everybody was very professional and pleasant. Sunday I could not get any signal on Sat 119. that is zero signal strength. I called Control Antenna to tell them replacement antenna was dead. Using the same set up with the Control Antenna tech on the line today we intitially got low strength and then all of a sudden got acceptable strength on Sat 119. Go figure. Not sure what changed, but hard to argue with Control Antenna. Some thing is intermittent, not sure what it is. Cables were flat and unstressed, connections were tight as usual, same unobstructed, clear view. I agree that I will likely need to search for Eastern arc satellites to get a stronger signal, which means the Winegard Proximity X2 is likely in my future. Stay tuned, going out on a trip next week, parked on the Atlantic Ocean. Let's see what happens. Thank you again for the helpful replies.