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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Usals problem & alignment
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<blockquote data-quote="jeallen01" data-source="post: 1089519" data-attributes="member: 176704"><p>Further thoughts about the possible methods of extending the feedarm:</p><p></p><p>1) Make & fit a straight piece that will bring the feedarm back exactly to the "factory spec" length and make sure that it is correctly aligned with the 2 parts of the now-cut arm.</p><p></p><p>2) Realign the dish, mainly in terms of elevation, but also possibly in the declination - that should "get the best out of" the existing dish arm setup in "factory spec configuration"</p><p></p><p>Then, if you want to experiment further, because, as others have already commented, sometimes the "factory spec" design does not actually point the LNB directly at the actual focal point of the dish!:</p><p></p><p>3) Mark everything so that all the parts can be refitted later if required, but then remove this extension piece.</p><p></p><p>4) Make up a second, or maybe even use the same, extension piece which can provide less or more of an extension - and then see if shortening or extending the extension (and thus respectively lowering or raising the point on the dish at which the LNB is aimed) makes any improvement?</p><p></p><p>5) Make up a third extension piece which gives you some scope to adjust the angle between the feedarm and LNB, install it on the arm to give the same extension as determined in stage 4) and try that out to see if, again, there is/is not any further improvement?</p></blockquote><p></p>
[QUOTE="jeallen01, post: 1089519, member: 176704"] Further thoughts about the possible methods of extending the feedarm: 1) Make & fit a straight piece that will bring the feedarm back exactly to the "factory spec" length and make sure that it is correctly aligned with the 2 parts of the now-cut arm. 2) Realign the dish, mainly in terms of elevation, but also possibly in the declination - that should "get the best out of" the existing dish arm setup in "factory spec configuration" Then, if you want to experiment further, because, as others have already commented, sometimes the "factory spec" design does not actually point the LNB directly at the actual focal point of the dish!: 3) Mark everything so that all the parts can be refitted later if required, but then remove this extension piece. 4) Make up a second, or maybe even use the same, extension piece which can provide less or more of an extension - and then see if shortening or extending the extension (and thus respectively lowering or raising the point on the dish at which the LNB is aimed) makes any improvement? 5) Make up a third extension piece which gives you some scope to adjust the angle between the feedarm and LNB, install it on the arm to give the same extension as determined in stage 4) and try that out to see if, again, there is/is not any further improvement? [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Usals problem & alignment
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