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DISH SETUP: Single sat, Multi-Sat & Motorised
Dish Setup Guides, Information threads and FAQs
1m motorised install
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<blockquote data-quote="jeallen01" data-source="post: 1149118" data-attributes="member: 176704"><p>Bear in mind that the generally-accepted engineering "rule of thumb" is that the bending radius for an RF cable shall be <u>no less than 10x the diameter</u> of the cable - e.g. if the cable diameter is 8mm (<em>most commonly used sat cables for non-commercial installations are between about 6 and 8 mm diameter)</em> then the bending radius should be <em>greater than 80 mm</em>. And we're talking about the "radius", <em>not the diameter, </em>of the bend - and <em>thus the diameter of the bend would need to be at least 160mm</em> (just over 6" for luddites!), and anything higher than that is better.</p><p></p><p>BTW I'm referring to cables with "plastic" insulations and sheaths - the min bending radius for armoured and similar cables will be a LOT higher!</p><p></p><p>The 2nd & 3rd photos clearly show that the bend doesn't meet that "rule of thumb", and consequently the cable is clearly kinked - which is definitely NOT good for the RF performance and almost certainly has had some effect on the SS/SQ! A definite "NO NO" and so you need to fix that!</p><p></p><p>PS: thanks for showing how NOT to do it!</p></blockquote><p></p>
[QUOTE="jeallen01, post: 1149118, member: 176704"] Bear in mind that the generally-accepted engineering "rule of thumb" is that the bending radius for an RF cable shall be [U]no less than 10x the diameter[/U] of the cable - e.g. if the cable diameter is 8mm ([I]most commonly used sat cables for non-commercial installations are between about 6 and 8 mm diameter)[/I] then the bending radius should be [I]greater than 80 mm[/I]. And we're talking about the "radius", [I]not the diameter, [/I]of the bend - and [I]thus the diameter of the bend would need to be at least 160mm[/I] (just over 6" for luddites!), and anything higher than that is better. BTW I'm referring to cables with "plastic" insulations and sheaths - the min bending radius for armoured and similar cables will be a LOT higher! The 2nd & 3rd photos clearly show that the bend doesn't meet that "rule of thumb", and consequently the cable is clearly kinked - which is definitely NOT good for the RF performance and almost certainly has had some effect on the SS/SQ! A definite "NO NO" and so you need to fix that! PS: thanks for showing how NOT to do it! [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Dish Setup Guides, Information threads and FAQs
1m motorised install
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