It looks like the declination adjustment is done approximately at first by choosing one of the three holes on the top of the mount where it connects. Right now it's in the middle hole.
I'm betting those are separated by whole degrees like 2 or three.
Once you determine what the declination is supposed to be for your latitude, and you determine how many degrees of declination each of the three holes represents ( I wonder if it was stamped on there originally) then I would compute washer thickness this way -
Distance between top hole and bottom hole where it connects to the actual dish
"D" times 2 (2D) times Pi (3.1415) divided by 360 = how thick a shim has to be to equal 1 degree of declination.
You can nail the declination exactly that way in my opinion.
That said, I never used a shim on my Birdview and it's set for 5 degrees. My declination is a quarter of a degree less and I get every satellite from 55.5 w to 148 if I wanted it.
I'm betting those are separated by whole degrees like 2 or three.
Once you determine what the declination is supposed to be for your latitude, and you determine how many degrees of declination each of the three holes represents ( I wonder if it was stamped on there originally) then I would compute washer thickness this way -
Distance between top hole and bottom hole where it connects to the actual dish
"D" times 2 (2D) times Pi (3.1415) divided by 360 = how thick a shim has to be to equal 1 degree of declination.
You can nail the declination exactly that way in my opinion.
That said, I never used a shim on my Birdview and it's set for 5 degrees. My declination is a quarter of a degree less and I get every satellite from 55.5 w to 148 if I wanted it.