We are also having reception problems with our Playmaker antenna and Wally receiver. We switched to this setup from Direct TV the first part of June. With Direct, we used the satelitte port in the wet bay and the internal connection with no problems. With the Playmaker and Wally, we do not get a connection is we use the trailer connections. We can only use a direct connection from the antenna to the receiver.
I have not put a meter on the internal satelitte setup. But it seems strange it worked fine with Direct and will not work with Dish. And we have made sure to keep it to under 50 feet including trailer wiring.
What we are doing works but I don't like the cable running out the door.