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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
Motorised Skew - a solution for big dishes?
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<blockquote data-quote="pjgregory" data-source="post: 517127" data-attributes="member: 288654"><p>I am a new member on this forum, but I have spent the last week in reading a lot of posts about installing Big Dishes. Like may others, I am trying to get Astra 2D for BBC. </p><p></p><p>Living in central Italy (80km south of Florence), I know it is not easy. My exiting 2.4m IRTE dish is not working. While I have now bought the parts recomended here (Pace 2600 digibox, Invacom Quad C120 LNB etc., I am facing up to the reality of having to install a 3.1m or even 3.8m dish to make it work. Assuming I can find out where to buy it, how to transport it and how to assemble it to the accuracy required, there is still the problem of aligning such a monster.</p><p></p><p>Setting the feedhorn for the correct focal length and pointing it exactly at the center of the dish <u>should</u> only need to be done once during assembly. Pointing the dish at Astra 2D can be done from the AZ/EL screws at the back. But what about the skew of the LNB. It is only through reading post here that I have come to realise just how important this can be. One contributor (Snap) has talked of sub degree adjustments. How do you do this?</p><p></p><p>Well there is one photgraph of a guy standing inside the dish. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite9" alt=":eek:" title="Eek! :eek:" loading="lazy" data-shortname=":eek:" /> I could hire a cherry picker and operator for a few days or build some sort of mobile scaffolding gantry.</p><p></p><p>Can you buy, or has anyone tried to make a motorized LNB mount that would allow you to rotate the LNB electically to sub-degree accuracy? Although it first sight it might appear total overkill, the other options for a non professional installer might just be worse. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite13" alt=":-rofl2" title="roll on floor :-rofl2" loading="lazy" data-shortname=":-rofl2" /></p><p></p><p>PJG</p></blockquote><p></p>
[QUOTE="pjgregory, post: 517127, member: 288654"] I am a new member on this forum, but I have spent the last week in reading a lot of posts about installing Big Dishes. Like may others, I am trying to get Astra 2D for BBC. Living in central Italy (80km south of Florence), I know it is not easy. My exiting 2.4m IRTE dish is not working. While I have now bought the parts recomended here (Pace 2600 digibox, Invacom Quad C120 LNB etc., I am facing up to the reality of having to install a 3.1m or even 3.8m dish to make it work. Assuming I can find out where to buy it, how to transport it and how to assemble it to the accuracy required, there is still the problem of aligning such a monster. Setting the feedhorn for the correct focal length and pointing it exactly at the center of the dish [U]should[/U] only need to be done once during assembly. Pointing the dish at Astra 2D can be done from the AZ/EL screws at the back. But what about the skew of the LNB. It is only through reading post here that I have come to realise just how important this can be. One contributor (Snap) has talked of sub degree adjustments. How do you do this? Well there is one photgraph of a guy standing inside the dish. :eek: I could hire a cherry picker and operator for a few days or build some sort of mobile scaffolding gantry. Can you buy, or has anyone tried to make a motorized LNB mount that would allow you to rotate the LNB electically to sub-degree accuracy? Although it first sight it might appear total overkill, the other options for a non professional installer might just be worse. :-rofl2 PJG [/QUOTE]
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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
Motorised Skew - a solution for big dishes?
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