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<blockquote data-quote="jeallen01" data-source="post: 1056704" data-attributes="member: 176704">Ferrite LNB polarisers were very useful, especially before modern high power sat transponders and low noise LNBs, because you had a lot more control over the actual skew angles used - you could adjust the polarisation &quot;little by little&quot; to home in on the best angle for receiving a particular transponder, and then store that on a transponder-by transponder basis in the Rx. Used that a lot on the NEC 5000 Rx &quot;in the day&quot;<img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/smile.png"&nbsp; class="smilie" loading="lazy" alt=":)" title="Smile&nbsp; &nbsp; :)" data-shortname=":)" />Early voltage-controlled polariser LNBs were, by comparison, very crude, and at the time I regretted the compromise that just gave you the &quot;H&quot; or &quot;V&quot; options as you couldn't then optimise received signals without physically turning the LNB (even though it substantially reduced the Rx &amp; LNB circuitry, and needed fewer cables between the two).</blockquote>

[QUOTE="jeallen01, post: 1056704, member: 176704"] Ferrite LNB polarisers were very useful, especially before modern high power sat transponders and low noise LNBs, because you had a lot more control over the actual skew angles used - you could adjust the polarisation "little by little" to home in on the best angle for receiving a particular transponder, and then store that on a transponder-by transponder basis in the Rx. Used that a lot on the NEC 5000 Rx "in the day":) Early voltage-controlled polariser LNBs were, by comparison, very crude, and at the time I regretted the compromise that just gave you the "H" or "V" options as you couldn't then optimise received signals without physically turning the LNB (even though it substantially reduced the Rx & LNB circuitry, and needed fewer cables between the two). [/QUOTE]

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