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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
Black Ultra LNBF to C120 Conversion
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<blockquote data-quote="Waveguide" data-source="post: 874544" data-attributes="member: 364636"><p>Curiosity made me open two more LNB's to get a look at the intestines.</p><p><a href="http://www.satellites.co.uk/forums/attachments/61773/" target="_blank">http://www.satellites.co.uk/forums/attachments/61773/</a></p><p>The earlier image is also valid for Inverto Black Ultra down to the minutest</p><p>details in the fixed feedhorn. The first image is from a Televes LNB almost</p><p>ten years old. Some product development! A Nokia LNB from 2001 was a bit</p><p>different with slightly tapered parts. All had the dimensions of the</p><p>circular waveguide almost the same, down to half a millimeter difference.</p><p> </p><p>The Invacom ADF-120 feedhorn has an inner diameter close to all the LNB's so</p><p>with a slight taper the transition will be smooth and comfortable for the </p><p>microwaves we are so eager to catch. If the other "improvements" I plan to</p><p>make to increase the S/N-ratio fails, I might be tempted to make a custom flange </p><p>for the Black Ultra the next time I'm close to a lathe. Since I already got this</p><p>LNB I might just as well check the truth in all the rumours.</p></blockquote><p></p>
[QUOTE="Waveguide, post: 874544, member: 364636"] Curiosity made me open two more LNB's to get a look at the intestines. [url]http://www.satellites.co.uk/forums/attachments/61773/[/url] The earlier image is also valid for Inverto Black Ultra down to the minutest details in the fixed feedhorn. The first image is from a Televes LNB almost ten years old. Some product development! A Nokia LNB from 2001 was a bit different with slightly tapered parts. All had the dimensions of the circular waveguide almost the same, down to half a millimeter difference. The Invacom ADF-120 feedhorn has an inner diameter close to all the LNB's so with a slight taper the transition will be smooth and comfortable for the microwaves we are so eager to catch. If the other "improvements" I plan to make to increase the S/N-ratio fails, I might be tempted to make a custom flange for the Black Ultra the next time I'm close to a lathe. Since I already got this LNB I might just as well check the truth in all the rumours. [/QUOTE]
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Sky Digital BSkyB, Freesat & Saorsat support forum
Sky & Freesat fringe reception
Black Ultra LNBF to C120 Conversion
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