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SMW OA 1600 dish
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<blockquote data-quote="archive10" data-source="post: 923625"><p>So the question is ... what LNBs to use?</p><p></p><p>It all depends on the dish f/D (or equivalent feedhorn opening angle).</p><p>If the f/D of the virtual dish is 0.6, we can choose any of the "Universal LNBs" on the market.</p><p>If not, maybe we have to buy a load of the SMW feedhorns to match the dish.</p><p></p><p>The manual of the OA-1600 refers to the SMW feedhorns XM-351 and XM-351L (which seems to have been made specifically for this dish). They have an equivalent f/D of 0.45 - 0.65, so most likely to be optimal around 0.55 (although I am guessing).</p><p>If using a bunch of 0.6 f/D "Universal LNBs", we are not going to illuminate the maximum area of the "virtual dishes". (So not the end of the world, with universal LNBs, the dish is just equivalent to a bunch of 90 cm dishes or something, rather than 100 cms if using the proper feed-horn.)</p><p></p><p>I have two SWM feedhorns, one is the XM-601, the other an XFR-45, a Fe-rotor equipped version of the XM-601. Obviously, these could be used on the OA-1600, but I think I'd rather use generic LNBs on this dish.</p><p></p><p>So here's an unusual question: Which "standard universal LNBs" work best a 0.55 dish?</p></blockquote><p></p>
[QUOTE="archive10, post: 923625"] So the question is ... what LNBs to use? It all depends on the dish f/D (or equivalent feedhorn opening angle). If the f/D of the virtual dish is 0.6, we can choose any of the "Universal LNBs" on the market. If not, maybe we have to buy a load of the SMW feedhorns to match the dish. The manual of the OA-1600 refers to the SMW feedhorns XM-351 and XM-351L (which seems to have been made specifically for this dish). They have an equivalent f/D of 0.45 - 0.65, so most likely to be optimal around 0.55 (although I am guessing). If using a bunch of 0.6 f/D "Universal LNBs", we are not going to illuminate the maximum area of the "virtual dishes". (So not the end of the world, with universal LNBs, the dish is just equivalent to a bunch of 90 cm dishes or something, rather than 100 cms if using the proper feed-horn.) I have two SWM feedhorns, one is the XM-601, the other an XFR-45, a Fe-rotor equipped version of the XM-601. Obviously, these could be used on the OA-1600, but I think I'd rather use generic LNBs on this dish. So here's an unusual question: Which "standard universal LNBs" work best a 0.55 dish? [/QUOTE]
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SMW OA 1600 dish
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