I bought the AirTV ota dual adapter for my Wally. At first, it worked great. It always ran hot. When it started pixelating and losing sound, I called AirTV. They totally denied any connection to DISH and said they didn't warranty them to run on DISH receivers. So, since most everyone else here had good luck with them, I bought another.
At first, the new one ran great, although hot. Then, after a couple of weeks it started doing the same as the other. I live on flat coastal ground and station towers are 18 miles away. I have a Channel Master 2018 antenna. Two stations have maximum signals, two have mediocre signals. When the tuners were new, all stations pegged out at 100%.
Not saying to not buy the tuner, just relaying my experience with it.