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Satellite Systems - What to Buy - What to install
monoblock LNB.
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<blockquote data-quote="a33" data-source="post: 1002556" data-attributes="member: 332642"><p>So, if you are agreeing with me, then feedhorn 'aiming' within a monoblock is not very important, but feedhorn distance is. Glad that is solved <img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/smile.png" class="smilie" loading="lazy" alt=":)" title="Smile :)" data-shortname=":)" /> .</p><p></p><p>The two monoblocks I have are in storage right now,</p><p>But if you look here, under 'specifications', you see that the tubes between feedhorns and 'body' of the monoblock are perfectly parallel: <a href="http://www.inverto.tv/products/product.php?section=1&id=254" target="_blank">Inverto - IDLB-SINM62-MNOO3-8PP -</a></p><p>In the feedhorn themselves I never noticed an angle, but I never watched with much attention I must say. So I assume they are also straight-angled and parallel.</p><p></p><p>By the way. The f/D ratio of a dish itself is not really important in this matter; important is only the effective focal distance of the dish, see for instance: <a href="https://www.satellites.co.uk/forums/threads/adjusting-dish-to-hotbird-using-sky-mini-dish.163574/page-2#post-957045" target="_blank">Adjusting dish to Hotbird using Sky mini dish</a> (though I now know that Delta Azimuth isn't the exact needed figure for the needed distance calculation, but the 'angle difference' -- a similar calculation but with a slightly different outcome).</p><p></p><p>f/D is only important for the comparison of manufacturer's monoblock information, as manufacturers don't usually mention the relevant focal distance, and/or the azimuth/angle difference the monoblock is meant for. That is a pity, because these would be the real relevant parameters. </p><p>Giving the exact distance between the centres of the feedhorns would give the same information; luckily on some webpages (such as the one above) you can try and measure/deduct the distance yourself from the drawings.</p><p></p><p>Greetz,</p><p>A33</p><p></p><p>Addendum: Link to a post/picture of the squinting LNBs of the Viosiosat BiSat G3B bracket: <a href="https://www.sat4all.com/forums/topic/277195-visiosat-bisat-g4-1-of-2-smalle-alps-koppen/?p=1763886" target="_blank">visiosat bisat G4; 1 of 2 smalle 'alps' koppen? - Schotelpark - Sat4all</a> . They are rreeaallllyy squinting, way out from the 'horizontal G-spot'....</p><p>The squinting is needed, because else the distance between the LNBs would be much too big. Nevertheless it works quite satisfactory ;) .</p></blockquote><p></p>
[QUOTE="a33, post: 1002556, member: 332642"] So, if you are agreeing with me, then feedhorn 'aiming' within a monoblock is not very important, but feedhorn distance is. Glad that is solved :) . The two monoblocks I have are in storage right now, But if you look here, under 'specifications', you see that the tubes between feedhorns and 'body' of the monoblock are perfectly parallel: [URL="http://www.inverto.tv/products/product.php?section=1&id=254"]Inverto - IDLB-SINM62-MNOO3-8PP -[/URL] In the feedhorn themselves I never noticed an angle, but I never watched with much attention I must say. So I assume they are also straight-angled and parallel. By the way. The f/D ratio of a dish itself is not really important in this matter; important is only the effective focal distance of the dish, see for instance: [URL="https://www.satellites.co.uk/forums/threads/adjusting-dish-to-hotbird-using-sky-mini-dish.163574/page-2#post-957045"]Adjusting dish to Hotbird using Sky mini dish[/URL] (though I now know that Delta Azimuth isn't the exact needed figure for the needed distance calculation, but the 'angle difference' -- a similar calculation but with a slightly different outcome). f/D is only important for the comparison of manufacturer's monoblock information, as manufacturers don't usually mention the relevant focal distance, and/or the azimuth/angle difference the monoblock is meant for. That is a pity, because these would be the real relevant parameters. Giving the exact distance between the centres of the feedhorns would give the same information; luckily on some webpages (such as the one above) you can try and measure/deduct the distance yourself from the drawings. Greetz, A33 Addendum: Link to a post/picture of the squinting LNBs of the Viosiosat BiSat G3B bracket: [URL="https://www.sat4all.com/forums/topic/277195-visiosat-bisat-g4-1-of-2-smalle-alps-koppen/?p=1763886"]visiosat bisat G4; 1 of 2 smalle 'alps' koppen? - Schotelpark - Sat4all[/URL] . They are rreeaallllyy squinting, way out from the 'horizontal G-spot'.... The squinting is needed, because else the distance between the LNBs would be much too big. Nevertheless it works quite satisfactory ;) . [/QUOTE]
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