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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Prime focus feed 0.55 f/d
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<blockquote data-quote="steffo78" data-source="post: 143483" data-attributes="member: 196557"><p>Why dont you take a universal LNB and make a test? f/d around 0.6 usually</p><p>Adjust up and down until you get maximum signal strength.</p><p>I guess it would give better results than a feedhorn with f/d 0.4, gives you an indication in the right direction.</p><p>It is a little confusing but as I have understood it a feedhorn has a f/d value where it is peaking but you can also use it around that value.</p><p>Then the focalpoint can be at different spots inside the feedhorn, within a range for example 0.5-0.7 , this is at least my conclusion, please correct me if I am wrong.</p><p>If you have a dish with f/d 0.55 and use a horn with f/d 0.6 you must move the horn a little bit out compared to using a "perfect" feedhorn.</p><p></p><p>Go to satellite-calculations.com and calculate the opening angle for different f/d values.</p></blockquote><p></p>
[QUOTE="steffo78, post: 143483, member: 196557"] Why dont you take a universal LNB and make a test? f/d around 0.6 usually Adjust up and down until you get maximum signal strength. I guess it would give better results than a feedhorn with f/d 0.4, gives you an indication in the right direction. It is a little confusing but as I have understood it a feedhorn has a f/d value where it is peaking but you can also use it around that value. Then the focalpoint can be at different spots inside the feedhorn, within a range for example 0.5-0.7 , this is at least my conclusion, please correct me if I am wrong. If you have a dish with f/d 0.55 and use a horn with f/d 0.6 you must move the horn a little bit out compared to using a "perfect" feedhorn. Go to satellite-calculations.com and calculate the opening angle for different f/d values. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Prime focus feed 0.55 f/d
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