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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
additional reflector beside offset dish?
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<blockquote data-quote="Likvid" data-source="post: 62135" data-attributes="member: 176379"><p>Offset dishes are most effecient at smaller sizes.....</p><p></p><p>Over 1.8m prime-focus dishes are the standard, or even in CATV business where Cassegrain dishes are most effecient but at large sizes like 3.7m and upwards.</p><p></p><p>I used to have a 1.8m Cassegrain dish, it was nearly as effecient as a ordinary 2.1 prime-focus dish.</p><p></p><p>Deep dishes are also better but requires excellent feeds, i used to install several Winegard 2.4m and 3.1m dishes which got a F/D of 0.28 compared to 0.40 prime-focus dishes usually have.</p><p></p><p>The Winegard dishes were made of mesh but the signal wasn't leaking as the holes were within the 2.54mm tolerance for Ku-band.</p><p></p><p>You had to use Seavey Engineering feeds for those dishes, but they were VERY good and excellent quality.</p></blockquote><p></p>
[QUOTE="Likvid, post: 62135, member: 176379"] Offset dishes are most effecient at smaller sizes..... Over 1.8m prime-focus dishes are the standard, or even in CATV business where Cassegrain dishes are most effecient but at large sizes like 3.7m and upwards. I used to have a 1.8m Cassegrain dish, it was nearly as effecient as a ordinary 2.1 prime-focus dish. Deep dishes are also better but requires excellent feeds, i used to install several Winegard 2.4m and 3.1m dishes which got a F/D of 0.28 compared to 0.40 prime-focus dishes usually have. The Winegard dishes were made of mesh but the signal wasn't leaking as the holes were within the 2.54mm tolerance for Ku-band. You had to use Seavey Engineering feeds for those dishes, but they were VERY good and excellent quality. [/QUOTE]
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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
additional reflector beside offset dish?
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