Hi Here is the 137 MHz RHCP antenna we have developed http://www.poes-weather.com/download/jm-dca/
This antenna will give you better performance at low satellite elevations (horizons). It is easy to build and you don't have to be that careful. We don't use a pre-amp if coax < 15 m (loss ~2 dB RG-58). -- Best Regards, Patrik Tast POES-Weather Ab Ltd Remote Sensing Business id: FI 23624190 CEO Patrik Tast GSM: +358 40 833 11 70 Street address: Furuskogsvägen 89 Postal code: 65280 City: Vasa Country: Finland Web: poes-weather.com -----Original Message----- From: John Coppens <j...@jcoppens.com> To: discuss-gnuradio@gnu.org Subject: Re: [Discuss-gnuradio] NOAA antenna Date: Wed, 15 May 2013 13:29:09 -0300 On Wed, 15 May 2013 08:29:59 -0400 "Marcus D. Leech" <mle...@ripnet.com> wrote: > I think a lot of people use a QFH antenna, or a turnstile antenna for > NOAA satellites at 137Mhz. Note that you will almost certainly need an antenna amplifier too (unless you make a huge antenna ;) Even a specialized receiver needs one to compensate for the cable loss. And the ezcap receiver is not too sensitive either... As Marcus stated, many use QFH antennas (sometimes called QHA), though many also use turnstiles (two, crossed dipoles) because it looks easier to build. If interested, there's some info you might find interesting on my site: http://www.jcoppens.com/ant/qfh/index.en.php (QFH antenna construction) http://www.jcoppens.com/sat/gaasfet/index.en.php (Example antenna amp) John _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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