RogerL said:
colin-yorkshire said:
adjustments to the elevation as in step two, would be minor,
I disagree - the variation in elevation within the UK is considerable and even wider if you include Europe.
From practical experience, it doesn't take the tripod post to be much out of vertical to give no signal at all.
sorry Roger I am afraid we will have to disagree on this, for two reasons,
1. doing a quick scan of locations at random gave the following results for Astra 2,
Wick, scotland, elevation 18.3 degrees, Azimuth(mag) 148 degrees, LNB skew - 10.2 degrees.
Home (central) elevation 23 degrees, Azimuth(mag) 146 degrees, LNB skew -12.4
St Just, cornwall, elevation 24.2 degrees. Azimuth(mag) 141.9 degrees, LNB skew -17 degrees.
Paris, France, elevation 28.7, Azimuth(mag) 147.6 degrees LNB skew -13.4 degrees,
the differences in elevation and azimuth from furthest north to furthest south is 10.4 degrees and 0.4 degrees respectively,
and from furthest east, to furthest west, is 4.5 degrees and 7.7 degrees respectively,
not what you would call a considerable wide variation "well I wouldn't anyway", as most places inbetween the variation would be quite small and easily picked up via the sat finder. given that a vertical dish is about 25 degrees in Paris the dish would be elevated backwards by 3 degrees and Wick pointing downwards by 7.7 degrees again not a huge ammount, remember the cluster of satelittes is 38.000 km away,
2. while it is true a non vertical pole would alter the elevation scale on the dish, providing the dish is vertical ie 25 degrees it will still recieve a signal, next time you are walking the dog ect around your estate look at the sky dishes fitted to houses notice how many brackets are not straight as mounted to the wall. the dishes will be at the same angle but not the fixings. mine for instance (fitted by SKY leans back about 15 degrees, but I still have a 100% signal, because the dish is adjusted to the correct elevation.