I'm writing this as I'm watching DirecTV Chappie 4K Test and it looks fantastic. DirecTV's website says that you need a HR54 minimum to get 4K. What's the truth?
I didn't count them. But I know that there are several more. Some are too weak for me to receive with any quality. I have a cheap indoor antenna that does what I want. Especially with your help I can now get 5-3.