Originally Posted by
B52
Place 2 or 3 string lines across the face of the dish from the outer arc edges. at the center, where the strings are crossing they should just be touching, if any gaps it means the dish asthmatics is out, meaning reduced efficiency. Then have a look at the feedhorn center alignment. if you can see through the feed wave guide, the center should be the string line crossings and the very center of the dish should be all aligned for maximum efficiency. if you can't see through the wave guide, use a tube instead of the LNB.
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