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DISH SETUP: Single sat, Multi-Sat & Motorised
Channel master 180 dish installation project
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<blockquote data-quote="archive10" data-source="post: 1049304"><p>And it gets worse.</p><p>More important then the number of attachment points between LNB and feedhorn is the bore of the waveguides in the two components.</p><p>The transition between two sections of the waveguide should be as smooth as possible.</p><p>(The different C and WR interfaces specify the waveguide size and shape.)</p><p>If you have, say, an abrupt transition between a 30 mm pipe and a 27 mm pipe, the "step" will make all sorts of re- and deflections, giving worse performance.</p><p>Luckily, the common 6-hole feedhorns seems to be C120-like (although I don't know if it's another Cx standard).</p><p>This means you can even (carefully) drill new hole in either feedhorn or LNB to make new holes to make more than two attachment points...</p></blockquote><p></p>
[QUOTE="archive10, post: 1049304"] And it gets worse. More important then the number of attachment points between LNB and feedhorn is the bore of the waveguides in the two components. The transition between two sections of the waveguide should be as smooth as possible. (The different C and WR interfaces specify the waveguide size and shape.) If you have, say, an abrupt transition between a 30 mm pipe and a 27 mm pipe, the "step" will make all sorts of re- and deflections, giving worse performance. Luckily, the common 6-hole feedhorns seems to be C120-like (although I don't know if it's another Cx standard). This means you can even (carefully) drill new hole in either feedhorn or LNB to make new holes to make more than two attachment points... [/QUOTE]
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DISH SETUP: Single sat, Multi-Sat & Motorised
Channel master 180 dish installation project
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