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Triax 2120 prime focus aluminium antenna w. polar mount
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<blockquote data-quote="archive10" data-source="post: 1053178"><p>Time to try some reception (fringe, of course).</p><p>Fist fitting an LNB. Dug out the Inverto Black Pro Single C120.</p><p></p><p>In contrast to the 2140, this dish came with what I hoped was the original feed-horn.</p><p>This, therefore, is what the LNB mount should look (not like the "40mm-adapted" version on the 2140).</p><p>[USER=404998]@Spiff[/USER] can you confirm this is what your LNB mount looks like?</p><p></p><p>[ATTACH]118042[/ATTACH] [ATTACH]118043[/ATTACH]</p><p></p><p>Tried to figure out how to mount LNB; should the LNB holder plate go in-front or behind of the feed-horn/LNB? Settled for "plate before feedhorn". (This also ties in with pics on the 'net.)</p><p>Had to mount the feed-horn upside down, as the cable clashed with the plate and feed support arms.</p><p></p><p>[ATTACH]118044[/ATTACH] [ATTACH]118046[/ATTACH]</p><p></p><p>Interestingly, the seller had the plate *between* the feed horn and the LNB, which is not ideal as the waveguides then have a gap between them. Nevertheless, he claimed it worked very well.</p><p></p><p>Dialed 10773H into the meter. Move the dish about a bit (Azimuth) until I got something, then adjust elevation to get proper signal. Tadah - BBC1 London coming in clear and faultless. 10 minutes of optimising brought consistant signal.</p><p>Signal strength around 68.5 dBuV, C/N at around 7.8 dB.</p><p></p><p>[ATTACH]118045[/ATTACH] [ATTACH]118047[/ATTACH] [ATTACH]118048[/ATTACH]</p><p></p><p>So...</p><p>A few thoughts:</p><p></p><p>1) The dish is clearly warped. But nevertheless delivers 28.5 spor-beam reception north of Copenhagen. Wonder if any "de-warping" would make a significant difference?</p><p>2) Polar mount is quite dilapidated. Althogh refurb should be easier than a rusty CM polar mount - perhaps it's not worth it?</p><p>3) Yet another 1.2m dish - maybe I would get more mileage out of the others?</p></blockquote><p></p>
[QUOTE="archive10, post: 1053178"] Time to try some reception (fringe, of course). Fist fitting an LNB. Dug out the Inverto Black Pro Single C120. In contrast to the 2140, this dish came with what I hoped was the original feed-horn. This, therefore, is what the LNB mount should look (not like the "40mm-adapted" version on the 2140). [USER=404998]@Spiff[/USER] can you confirm this is what your LNB mount looks like? [ATTACH]118042[/ATTACH] [ATTACH]118043[/ATTACH] Tried to figure out how to mount LNB; should the LNB holder plate go in-front or behind of the feed-horn/LNB? Settled for "plate before feedhorn". (This also ties in with pics on the 'net.) Had to mount the feed-horn upside down, as the cable clashed with the plate and feed support arms. [ATTACH]118044[/ATTACH] [ATTACH]118046[/ATTACH] Interestingly, the seller had the plate *between* the feed horn and the LNB, which is not ideal as the waveguides then have a gap between them. Nevertheless, he claimed it worked very well. Dialed 10773H into the meter. Move the dish about a bit (Azimuth) until I got something, then adjust elevation to get proper signal. Tadah - BBC1 London coming in clear and faultless. 10 minutes of optimising brought consistant signal. Signal strength around 68.5 dBuV, C/N at around 7.8 dB. [ATTACH]118045[/ATTACH] [ATTACH]118047[/ATTACH] [ATTACH]118048[/ATTACH] So... A few thoughts: 1) The dish is clearly warped. But nevertheless delivers 28.5 spor-beam reception north of Copenhagen. Wonder if any "de-warping" would make a significant difference? 2) Polar mount is quite dilapidated. Althogh refurb should be easier than a rusty CM polar mount - perhaps it's not worth it? 3) Yet another 1.2m dish - maybe I would get more mileage out of the others? [/QUOTE]
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Triax 2120 prime focus aluminium antenna w. polar mount
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