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Satellite Systems - What to Buy - What to install
Coax
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<blockquote data-quote="jeallen01" data-source="post: 1149732" data-attributes="member: 176704"><p>[USER=417967]@cwsat[/USER]</p><p></p><p>1) The Coax Comparison Chart that Satcure produced some time before they went out of business is attached as promised - obviously now ignore any implication that they could now provide such cable or terminated cables because they can't (although other suppliers probably could)!</p><p></p><p>NB: generic air-spaced coax is not included in the chart, but is likely to be slightly worse than it's foam-filled size-equivalent (and more prone to corrosion issues due t water getting into the air-spaces). OTOH, I and many others have it used perfectly successfully in non-critical installations such as UK Sky from Astra 2 where the signal strength is quite high.</p><p></p><p><em><u>PS: Even if you are just viewing this thread, PLEASE download the chart if you think you might ever need the info!</u></em></p><p></p><p>2) Note from that chart that the nominal attenuation figures are <strong>PER 100m</strong>, and thus roughly 1/10 that for 10m! Therefore the attenuation over 10 or less metres is only several dB or so - which is what one can easily get from poor connections, kinks, misaligned dishes, etc.</p><p></p><p>3) Therefore, now that you have clarified as to which setup you are asking for advice, and taking into account the values in that chart, do <strong>you</strong> think that it worth the effort to replace the coax that you are currently using, and if so then by which sort of cable?</p><p><em>(Personally, I doubt it)</em></p></blockquote><p></p>
[QUOTE="jeallen01, post: 1149732, member: 176704"] [USER=417967]@cwsat[/USER] 1) The Coax Comparison Chart that Satcure produced some time before they went out of business is attached as promised - obviously now ignore any implication that they could now provide such cable or terminated cables because they can't (although other suppliers probably could)! NB: generic air-spaced coax is not included in the chart, but is likely to be slightly worse than it's foam-filled size-equivalent (and more prone to corrosion issues due t water getting into the air-spaces). OTOH, I and many others have it used perfectly successfully in non-critical installations such as UK Sky from Astra 2 where the signal strength is quite high. [I][U]PS: Even if you are just viewing this thread, PLEASE download the chart if you think you might ever need the info![/U][/I] 2) Note from that chart that the nominal attenuation figures are [B]PER 100m[/B], and thus roughly 1/10 that for 10m! Therefore the attenuation over 10 or less metres is only several dB or so - which is what one can easily get from poor connections, kinks, misaligned dishes, etc. 3) Therefore, now that you have clarified as to which setup you are asking for advice, and taking into account the values in that chart, do [B]you[/B] think that it worth the effort to replace the coax that you are currently using, and if so then by which sort of cable? [I](Personally, I doubt it)[/I] [/QUOTE]
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Satellite Systems - What to Buy - What to install
Coax
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