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<blockquote data-quote="Simba27" data-source="post: 231185" data-attributes="member: 182734">I understand what you are saying about diffraction. The point of the exercise being to modify the dish such that the waves are reflected into the LNB rather then being diffracted. I'm not sure what you mean about an impedance mismatch or how that is relevant.Having looked at my dish again, I can see why the experiment failed. The surface of the filled-holes is nowhere near as smooth as the surface of the metal. I do believe that some improvement would have been noticed if I had chosen a very fine filler, and then used micromesh to polish it really smooth - the dish having been made equivalent to a solid dish. However it's also true that the man-hours necessary to do this properly would be prohibitive.As predicted earlier: I am not getting any less signal because I have not modified the existing surface. Unfortunately I am not getting any more signal because the surfaces I have added are not smooth and accurate enough.</blockquote>

[QUOTE="Simba27, post: 231185, member: 182734"] I understand what you are saying about diffraction. The point of the exercise being to modify the dish such that the waves are reflected into the LNB rather then being diffracted. I'm not sure what you mean about an impedance mismatch or how that is relevant. Having looked at my dish again, I can see why the experiment failed. The surface of the filled-holes is nowhere near as smooth as the surface of the metal. I do believe that some improvement would have been noticed if I had chosen a very fine filler, and then used micromesh to polish it really smooth - the dish having been made equivalent to a solid dish. However it's also true that the man-hours necessary to do this properly would be prohibitive. As predicted earlier: I am not getting any less signal because I have not modified the existing surface. Unfortunately I am not getting any more signal because the surfaces I have added are not smooth and accurate enough. [/QUOTE]

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