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<blockquote data-quote="Channel Hopper" data-source="post: 1111" data-attributes="member: 175144"><p>No matter how good the material - mesh will always be inferior to solid. There are factors of nearly 20% in terms of gain and other contributing noise elements associated with mesh at the hightr frequencies that make going for a nice non seethrough dish a viable alternative for weak signals.</p><p></p><p>For electrial purposes a grid or mesh has additional trouble with second reflections and absorbtion near the rim, especially when there is a layer of water on the surface, so rain will degrade the performance far quicker than a solid. Very relevant when you need the best possible C/N ratio for digital reception.</p><p></p><p>All the fibreglass antennas , Prodelin, Fuba, Channel Master and Sharcstar are additionally composite with mesh inserts, though the reflective fabric is more secure against outside elements such as gravity - sagging , and wind loading - distortion, so they provide a better alternative to mesh on its own. One last advantage however is the lowering of the thermal noise generated within the fibre glass, so unless your metal dish has cooling on the rear of the reflector, its quite possible the composite antenna will be better than a solid metal unit on the hot days.</p><p></p><p>Nothing like metal though on cool early mornings.</p></blockquote><p></p>
[QUOTE="Channel Hopper, post: 1111, member: 175144"] No matter how good the material - mesh will always be inferior to solid. There are factors of nearly 20% in terms of gain and other contributing noise elements associated with mesh at the hightr frequencies that make going for a nice non seethrough dish a viable alternative for weak signals. For electrial purposes a grid or mesh has additional trouble with second reflections and absorbtion near the rim, especially when there is a layer of water on the surface, so rain will degrade the performance far quicker than a solid. Very relevant when you need the best possible C/N ratio for digital reception. All the fibreglass antennas , Prodelin, Fuba, Channel Master and Sharcstar are additionally composite with mesh inserts, though the reflective fabric is more secure against outside elements such as gravity - sagging , and wind loading - distortion, so they provide a better alternative to mesh on its own. One last advantage however is the lowering of the thermal noise generated within the fibre glass, so unless your metal dish has cooling on the rear of the reflector, its quite possible the composite antenna will be better than a solid metal unit on the hot days. Nothing like metal though on cool early mornings. [/QUOTE]
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