[amsat-bb] Best HT for satellite operation?
matthew at mrstevens.net
Fri Mar 10 21:30:51 UTC 2017
There's a recent QRZ thread here
that pretty much covers everything about the Elk v. Arrow discussion.
On Fri, Mar 10, 2017 at 4:22 PM, Greg D <ko6th.greg at gmail.com> wrote:
> Hi Patrick,
> One topic that's generated a lot of discussion in the past has been the
> difference between the Elk and Arrow portable antennas, specifically
> that one has the elements in the same plane, and the other has them at
> 90 degrees to each other.
> Was there a consensus on which gave the better results, including
> operator wrist action required (a usability issue)? I'm thinking that
> some satellites have their Tx and Rx antennas at different angles,
> meaning that for some the orientation where you hear the satellite best
> is not the best orientation for the satellite hearing you. I recall the
> discussion, but not the results.
> Greg KO6TH
> Patrick STODDARD (WD9EWK/VA7EWK) wrote:
> > Steve,
> > You could do that, or use a 2m/70cm diplexer as your filter
> > and only use the 2m side of the diplexer in line with your
> > SO-50 uplink radio.
> > I did something similar for an SO-50 demonstration at a
> > hamfest a couple of years ago, using two Baofeng HTs with
> > an Elk log periodic. You can see pictures of this setup in
> > a video I posted:
> > https://www.youtube.com/watch?v=_cLx9h-vNRA
> > I used a UV-82 for the uplink, and a UV-5R for the downlink,
> > connected through a diplexer to my Elk log periodic. I did
> > not experience desense with this setup, and made a good
> > number of contacts during this demonstration. I had to use
> > the diplexer with my Elk, with only one coax feedpoint, but
> > the diplexer also served as a good bandpass filter for the
> > radios.
> > 73!
> > Patrick WD9EWK/VA7EWK
> > http://www.wd9ewk.net/
> > Twitter: @WD9EWK
> > On Fri, Mar 10, 2017 at 11:21 AM, <skristof at etczone.com> wrote:
> >> I've used two Baofengs to work SO-50, and the V transmission from one
> >> still desenses the U reception in the other one, even though they are
> >> two separate radios.
> >> Do I put low-pass filter in the transmission line to squash that third
> >> harmonic?
> >> Steve AI9IN
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