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Satellite TV receivers & systems support forums
Fringe Reception General
Dish size question
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<blockquote data-quote="ralphmagno" data-source="post: 772323" data-attributes="member: 189146"><p>hello,</p><p>not realy.</p><p>most dish builders have done their math .</p><p>what matters is size and type.</p><p>prime focus</p><p>offset</p><p>cassagrain</p><p>gregorian.</p><p></p><p>nothing has 100% </p><p>lowest is prime focus 55% reflective</p><p>offset runs 60 to 65%</p><p>cassigrain and gregorian runs 70%</p><p></p><p>in that area. so a 2 meter prime may run the same gain as a 1.80 offset</p><p></p><p>and a 1.6 gergorian or cassagrain antenna may run the same as the upper two.</p><p></p><p>lnb noise fugure and type is important.</p><p>most lnb have a test sheet inside like ivacom.</p><p>ralph</p></blockquote><p></p>
[QUOTE="ralphmagno, post: 772323, member: 189146"] hello, not realy. most dish builders have done their math . what matters is size and type. prime focus offset cassagrain gregorian. nothing has 100% lowest is prime focus 55% reflective offset runs 60 to 65% cassigrain and gregorian runs 70% in that area. so a 2 meter prime may run the same gain as a 1.80 offset and a 1.6 gergorian or cassagrain antenna may run the same as the upper two. lnb noise fugure and type is important. most lnb have a test sheet inside like ivacom. ralph [/QUOTE]
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Satellite TV receivers & systems support forums
Fringe Reception General
Dish size question
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