[amsat-bb] Az-El Rotors
jerryconn at aol.com
Mon Jan 25 16:46:23 UTC 2016
I was wondering about the Lindenblad antennas. I live in an area where winter conditions aren't always conducive to going outside and working the Sats and eventually want to have an Az/El system but until the time and money are available I was considering building this style of antenna.
Does anybody have experience and/or recommendations?
From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of A. Kevin Arber
Sent: Monday, January 25, 2016 9:09 AM
To: Greg <gjd1958 at verizon.net>
Cc: AMSAT bbs <amsat-bb at amsat.org>; Fred Castello <fredcastello at gmail.com>
Subject: Re: [amsat-bb] Az-El Rotors
Agree about the "Eggbeater" style. When I first returned to the sats I homebrewed a couple and they worked fine. But even better is a Moxin style which provides gain and circular polarization. See Larry Cebik"s article in August 2001 QST. I built these and they worked great for the LEOs.
Great for portable too, as are omnidirectional.
On Mon, Jan 25, 2016 at 6:38 AM, Greg <gjd1958 at verizon.net> wrote:
> In addition to Kevin’s idea, you might want to consider some home-brew
> “eggbeaters.” When I first started on the LEO’s, they worked fine to
> get into the birds, including the ISS. Won’t outperform a beam many
> times, but they are efficient for the cost.
> On Jan 25, 2016, at 5:06 AM, A. Kevin Arber <kevin.w3dad at gmail.com> wrote:
> Hi Fred,
> If you're working the current crop of LEO sats, then you don't need an
> AZ/EL setup. Just AZ will do with the Arrow antenna set to about 20
> degrees elevation. I control my HD-73 with the Easy Rotor Controller
> (ERC) using SATPC-32. Very simple and works well with the Arrow.
> Get you started without too much invested.
> On Sun, Jan 24, 2016 at 11:13 PM, Fred Castello
> <fredcastello at gmail.com>
> > Please excuse the newbie. I have been receiving signals on SSB, CW,
> > Packet, and FM via just listening for a while now. I am newly back
> > into the satellites as I used to work the high elliptical orbit
> > birds years ago. Let my license lapse and just got it back and
> > upgraded. Now
> > the satellite bug again and have really tried researching on the net
> > but
> > a bit frustrated by the paucity of az-el rotors available. It seems
> > that there are primarily the Yeasu G-5500 type at $700 to $800 or
> > more or make your own and really no in-between. I am looking to
> > have a permanent installation that could track both az and el and
> > preferably be controlled by SatPC32. I am thinking of starting with
> > a small single antenna with both 2m and 70cm on it (i.e. Arrow or
> > other) which would present very low windage. When I initially got
> > re-interested I was imaging a cheap
> > with TV rotors but I don’t see any folks doing this and I would
> > prefer
> > to have to set my antenna solution up every time I want to work the
> > satellites. Am I missing something or could someone point me to an
> > or reference that I am not aware of? I really appreciate all of the
> > collective experience in this group and thanks for your time! I am
> using a
> > Kenwood TS 790A without the 1.2 Ghz installed.
> > Best,
> > Fred Castello, KF4FC
> > _______________________________________________
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