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New Lnb changer
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<blockquote data-quote="John" data-source="post: 1117092" data-attributes="member: 175005"><p>This is what i did for lnb alignment on my CM 1.8 Test Rig CJ if it's any use to you.</p><p>I adopted Rimants suggested lnb position angles which are in a thread on the forum - I did an illumination test using the original CM feed with revolving lazer pen at lnb using the original CM side arms and lower arm position and original lnb holder. Long story short, original CM illumination gave over illumination at the bottom of the dish by a fair amount collecting unwanted ground noise, and under illumination of the dish at the top, robbing me of signal - there's one of my forum threads buried somewhere which shows a video of the illumination test some where.</p><p>The wooden template is constructed to Rimants dimensions and knocked up out of 25mm x 5mm pine strips with a couple of plywood strengthening gussets etc glued into place. After careful positioning of the template to make sure the red tip at the end of the template is equal distance left and right of dish edges etc another illumination test was done which gave a perfect illumination tracking all around the dish edge - reception results afterwards showed an improvement over the original CM set up.</p><p>The bracketry at lnb area shows one of Rimants stainless arm supports but i modified the rest by making custom aux brackets to accept a variety of different lnb types and sizes that enabled the test lnb to be positioned with the red metal tip to be at the focal point and also the right pointing angle to the dish.</p><p>It worked for me CJ - here's a few pics</p><p>Note: The side arm positions shown are in a lower fixed position than original - long story short, gives more clearance for different or larger lnb sizes.</p><p></p><p>..............................................................................................................................................................................................................................................................................................................................</p><p>[ATTACH=full]138095[/ATTACH][ATTACH=full]138096[/ATTACH][ATTACH=full]138097[/ATTACH][ATTACH=full]138098[/ATTACH][ATTACH=full]138099[/ATTACH]</p></blockquote><p></p>
[QUOTE="John, post: 1117092, member: 175005"] This is what i did for lnb alignment on my CM 1.8 Test Rig CJ if it's any use to you. I adopted Rimants suggested lnb position angles which are in a thread on the forum - I did an illumination test using the original CM feed with revolving lazer pen at lnb using the original CM side arms and lower arm position and original lnb holder. Long story short, original CM illumination gave over illumination at the bottom of the dish by a fair amount collecting unwanted ground noise, and under illumination of the dish at the top, robbing me of signal - there's one of my forum threads buried somewhere which shows a video of the illumination test some where. The wooden template is constructed to Rimants dimensions and knocked up out of 25mm x 5mm pine strips with a couple of plywood strengthening gussets etc glued into place. After careful positioning of the template to make sure the red tip at the end of the template is equal distance left and right of dish edges etc another illumination test was done which gave a perfect illumination tracking all around the dish edge - reception results afterwards showed an improvement over the original CM set up. The bracketry at lnb area shows one of Rimants stainless arm supports but i modified the rest by making custom aux brackets to accept a variety of different lnb types and sizes that enabled the test lnb to be positioned with the red metal tip to be at the focal point and also the right pointing angle to the dish. It worked for me CJ - here's a few pics Note: The side arm positions shown are in a lower fixed position than original - long story short, gives more clearance for different or larger lnb sizes. .............................................................................................................................................................................................................................................................................................................................. [ATTACH type="full" alt="CM 1.8 lnb template. - reduced..jpg"]138095[/ATTACH][ATTACH type="full" alt="CM 1.8 lnb template. 1- reduced..jpg"]138096[/ATTACH][ATTACH type="full" alt="CM 1.8 lnb template. 2- reduced..jpg"]138097[/ATTACH][ATTACH type="full" alt="CM 1.8 lnb template. 4- reduced..jpg"]138098[/ATTACH][ATTACH type="full" alt="CM 1.8 lnb template. 5- reduced..jpg"]138099[/ATTACH] [/QUOTE]
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New Lnb changer
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