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Satellite TV receivers & systems support forums
Satellite Systems - What to Buy - What to install
For a given size which is better, parabolic or offset?
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<blockquote data-quote="spiney" data-source="post: 188907" data-attributes="member: 192438"><p>If possible, then an offset dish would always be better. Because, with prime focus dishes (including Cassegrain, etc), various bits "block" part of the radio "beam" falling on the reflective surface.</p><p></p><p>This effect varies, with dish type, so no "general formula" is possible.</p><p></p><p>As dishes get bigger, the offset type doesn't have enough mechanical stability, ie, the long lnb pole and dish surface would flex too much, putting the lnb "off focus".</p></blockquote><p></p>
[QUOTE="spiney, post: 188907, member: 192438"] If possible, then an offset dish would always be better. Because, with prime focus dishes (including Cassegrain, etc), various bits "block" part of the radio "beam" falling on the reflective surface. This effect varies, with dish type, so no "general formula" is possible. As dishes get bigger, the offset type doesn't have enough mechanical stability, ie, the long lnb pole and dish surface would flex too much, putting the lnb "off focus". [/QUOTE]
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Satellite TV receivers & systems support forums
Satellite Systems - What to Buy - What to install
For a given size which is better, parabolic or offset?
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