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Message: <blockquote data-quote="Llew" data-source="post: 986912" data-attributes="member: 175007">Very good John. It's handy that the throat aperture of the Ka/Ku LNBF is of a standard Ku LNBF ( internal Ku to Ka matching chamber inside). Well worth experimenting with the pipe length.Precision figures pretty good considering the ad hoc arrangement of the dish. I like the steps stand <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin    :D" loading="lazy" data-shortname=":D" />I have tried the Ka/Ku on the 1.2 Gibby, but the expected Ka signal improvement wasn't significant compared to it on the TD88. I'm not convinced that dish size makes a huge difference until you go up to 1.8M as you have, with the dish in very good condition and the Ka feedhorn precisely positioned.</blockquote>