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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
Best alternative lnb for invacom c120 quad or quattro
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<blockquote data-quote="Waveguide" data-source="post: 1078683" data-attributes="member: 364636"><p>I have been running a converted Inverto Black Ultra for three years now without any problems.</p><p>The interface consists of two parts made in a lathe and held together with a tight shrink-fit.</p><p>(a tube for the circular waveguide and a plate for the flange, a thin line shows where they meet)</p><p>Normally you would have to remove a lot of metal in the lathe if the part is both long and with </p><p>a large diameter somewhere but this is made with a shrink fit between a tube going into the </p><p>old feedhorn and a plate to make up the C120 flange. You can also optimise each part before assembly.</p><p>There is metal to metal contact in the bottom of the new circular waveguide. It can be improved further</p><p>by conducting paint (with lots of silver in it) but this one works without it. The tiny locking screws</p><p>press the interface down onto the other side. The polarisation angle is adjustable so it can be made to be</p><p>the same as other LNB's, easier to swap LNB's for tests if they are close to the sweet spot at the start.</p><p></p><p>[ATTACH]126972[/ATTACH]</p></blockquote><p></p>
[QUOTE="Waveguide, post: 1078683, member: 364636"] I have been running a converted Inverto Black Ultra for three years now without any problems. The interface consists of two parts made in a lathe and held together with a tight shrink-fit. (a tube for the circular waveguide and a plate for the flange, a thin line shows where they meet) Normally you would have to remove a lot of metal in the lathe if the part is both long and with a large diameter somewhere but this is made with a shrink fit between a tube going into the old feedhorn and a plate to make up the C120 flange. You can also optimise each part before assembly. There is metal to metal contact in the bottom of the new circular waveguide. It can be improved further by conducting paint (with lots of silver in it) but this one works without it. The tiny locking screws press the interface down onto the other side. The polarisation angle is adjustable so it can be made to be the same as other LNB's, easier to swap LNB's for tests if they are close to the sweet spot at the start. [ATTACH]126972[/ATTACH] [/QUOTE]
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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
Best alternative lnb for invacom c120 quad or quattro
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