Either of the cheaper ones will help. ?I bought the expensive Wingard digital one, but it is very confusing to operate, so I wouldn’t recommend it. ?(It shows higher digital numbers when the signal is stronger, but you can pretty much tell that anyway by just looking at the TV!) ?
First though I would remove the faceplate where the current coax connection is and see if there isn’t already some 12v wiring behind it. ?If there is a 7 amp fuse holder behind it, then it already has an amplifier. ?But if the fuse is burned out, then of course it won’t work, and the little green light won’t light up. ?If you find a fuse, try replacing it. ?If no fuse but you have 12v wiring, then?buy the one that is a faceplate with amplifier.