Lundy: FYI-My present home-- forty acres just west of Staley's at 26/47, is what I am selling to buy an Alpine. Then I will operate out of my just purchased cabin/13 acres on Old Vesper 77 just west of Birkenfeld. My wife of 48 years always wanted a fishin' hole on the Nehalem-- but C ended that dream last Dec. Now I will need to fish and Alpine solo.
The difference in signal strength you have experienced between your Kingdome and remote (I assume you mean a portable dish) is due to the difference in dish size-- the bigger the dish the more gain.
But I do have a cheap solution for those times you are largely stationary--though you will likely think it is a "Rube Goldberg" solution. But it does work by taking advantage of your distance from the satellite 25,000 miles above Texas-- which means the bird is at a low elevation with a very narrow beam from your perspective.
Build a lightweight hood that is open on one side facing the satellite and angled upward See Diagram
. Point the hood using the azimuth you use with the portable dish (Seattle 146 degrees). The upward angle of the top of the hood should use the elevation used with the dish plus 5 degrees to compensate for the true angle of the satellite (40 degrees should work from Seattle). Build the length of the hood so that rain will not hit the dome-- unless the rain is blowing sideways.
This may also cure an early morning NW dew.