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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
A 3.7m Prodeline dish for Astra 2D
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<blockquote data-quote="pjgregory" data-source="post: 555553" data-attributes="member: 288654"><p>Taking Iceman's advice. I moved the dish back into the horizontal position, replaced the lower petal and then tightened up all the bolts. I have now managed to find some 0.8mm flourescent orange and yellow nylon line to use for the string test.</p><p></p><p>I put the first line between two opposite panels. The second line goes between the two pannels at right angles. I tried it both above and below the first line. They touched in both positions. Then I tried the third line above, below and between the first two lines, finding the position where moving it up or down slightly just moved its neighbour as well. Finally I did the same same with the fourth line.</p><p></p><p>As far as I can see both by eye and in the photgraphs, all lines touch giving an error band in the region of 3-4mm.</p><p></p><p>So Iceman - is this good enougth?</p><p></p><p>The Prodeline manual suggests it should be better than 6mm. I am inclined to tighten every thing up and make any final adjustmnet when the dish is back to the operating position. Then I can use much finer line and get my eyeball up close to the crossing point.</p><p></p><p>PJG</p></blockquote><p></p>
[QUOTE="pjgregory, post: 555553, member: 288654"] Taking Iceman's advice. I moved the dish back into the horizontal position, replaced the lower petal and then tightened up all the bolts. I have now managed to find some 0.8mm flourescent orange and yellow nylon line to use for the string test. I put the first line between two opposite panels. The second line goes between the two pannels at right angles. I tried it both above and below the first line. They touched in both positions. Then I tried the third line above, below and between the first two lines, finding the position where moving it up or down slightly just moved its neighbour as well. Finally I did the same same with the fourth line. As far as I can see both by eye and in the photgraphs, all lines touch giving an error band in the region of 3-4mm. So Iceman - is this good enougth? The Prodeline manual suggests it should be better than 6mm. I am inclined to tighten every thing up and make any final adjustmnet when the dish is back to the operating position. Then I can use much finer line and get my eyeball up close to the crossing point. PJG [/QUOTE]
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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
A 3.7m Prodeline dish for Astra 2D
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