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Fringe Reception Reports
85.1W Sirius XM3
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<blockquote data-quote="s-band" data-source="post: 1132526" data-attributes="member: 407744"><p>[USER=417737]@manugf[/USER] Very nice work, and the scenery. Here is a link to a helical calculator that I used: <a href="http://jcoppens.com/ant/helix/calc.php" target="_blank">Antenas - Helicoidal simple - Calculadora Javascript</a></p><p></p><p>The pictures show the feed that I use on the Prodelin 3122 offset dish. Helices are fairly wide band antennas, this one was designed for 2250 centre but works reasonably well over a range of 1800-2500MHz (RHCP on dish). The helix was wound using 0.141" semi rigid cable. The foil near the feed point optimised the match. I use a Mini Circuits ZHL-1724HLN LNA as it has a very wide dynamic range and WiFi & cellular will easily overload lower power amplifiers. It's noise figure was measured in the region of 1.2dB. The output isolator reduces ripple.</p></blockquote><p></p>
[QUOTE="s-band, post: 1132526, member: 407744"] [USER=417737]@manugf[/USER] Very nice work, and the scenery. Here is a link to a helical calculator that I used: [URL="http://jcoppens.com/ant/helix/calc.php"]Antenas - Helicoidal simple - Calculadora Javascript[/URL] The pictures show the feed that I use on the Prodelin 3122 offset dish. Helices are fairly wide band antennas, this one was designed for 2250 centre but works reasonably well over a range of 1800-2500MHz (RHCP on dish). The helix was wound using 0.141" semi rigid cable. The foil near the feed point optimised the match. I use a Mini Circuits ZHL-1724HLN LNA as it has a very wide dynamic range and WiFi & cellular will easily overload lower power amplifiers. It's noise figure was measured in the region of 1.2dB. The output isolator reduces ripple. [/QUOTE]
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85.1W Sirius XM3
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