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<blockquote data-quote="jeallen01" data-source="post: 1115276" data-attributes="member: 176704">Frankly, that doesn't surprise me as the dishes aren't that dissimilar in &quot;size&quot;, and you'd have to get a substantially larger one&nbsp; (1.2-1.3m) for the SS/SQ to improve &quot;dramatically&quot;.It's not simply the &quot;top-edge to bottom-edge&quot; dimension that &quot;counts&quot; but the overall &quot;signal collection area&quot; - which will be much larger on a 1.2-1.3m dish than it is on a &quot;90-100cm&quot; dish.Edited: think of the issue this way, and I DO know that off-set dishes are not circular (!) - the area of a circle can be calculated by the formula A=p*&quot;r squared&quot; Thus a 100cm circular dish would have an area of 3.142* 50*50 =&gt; 3.142*2500 =&nbsp; around 0.8sq metres, whereas a 120 cm dish would have an area of around 1.5 sq metres, i.e. nearly double that of a 100cm dish!NB: all calcs done very roughly in my apology for a brain and thus &quot;subject to error&quot;, but I think you'll get the &quot;general idea&quot; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin&nbsp; &nbsp; :D" loading="lazy" data-shortname=":D" /></blockquote>

[QUOTE="jeallen01, post: 1115276, member: 176704"] Frankly, that doesn't surprise me as the dishes aren't that dissimilar in "size", and you'd have to get a substantially larger one (1.2-1.3m) for the SS/SQ to improve "dramatically". It's not simply the "top-edge to bottom-edge" dimension that "counts" but the [I]overall[/I] "signal collection [B]area[/B]" - which will be [I]much [/I]larger on a 1.2-1.3m dish than it is on a "90-100cm" dish. Edited: think of the issue this way, and I DO know that off-set dishes are not circular (!) - the area of a circle can be calculated by the formula A=p*"r squared" Thus a 100cm circular dish would have an area of 3.142* 50*50 => 3.142*2500 = around 0.8sq metres, whereas a 120 cm dish would have an area of around 1.5 sq metres[I], i.e. nearly double that of a 100cm dish![/I] NB: all calcs done very roughly in my apology for a brain and thus "subject to error", but I think you'll get the "general idea" :D [/QUOTE]

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