[amsat-bb] Best HT for satellite operation?

Greg D ko6th.greg at gmail.com
Fri Mar 10 21:22:07 UTC 2017

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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