[amsat-bb] EsHail Microwave transponder satellite
zilvinas.atkociunas at gmail.com
Thu Jun 2 06:21:58 UTC 2016
I am thinking/leaning to solely portable antenna system (in both terms -
compact ant lightweight - even umbrella style(?) because I don't like the
idea of separate dishes/antennas.
At the moment I have these things bought:
for uplink hackrf + 4W PA http://tinyurl.com/zyrr2ow (will test soon)
for downlink same hackrf + Octagon PLL LNB
This will be simplex solution but I don't think it's bad idea considering
satellite constant position/orientation. (no Doppler/az/el tracking issues)
So time to think about antenna(s)...
Zilvis LY2SS in KO05Nq
2016-06-01 22:00 GMT+03:00 Daniel Cussen <dan at post.com>:
> I asked a manufacturer of feeds (RFHAMDESIGN) and they said a dual
> feed was not possible. Uplink is circular and downlink is linear using
> a normal LNB.
> However many Europeans may have one dish for TV anyway. It is
> relatively easy to mount two LNBs on one dish for 2 different
> satellite positions, so one dish for household TV with a second LNB
> for Eshail sat, The LNB that is offset from prime focus will see a
> smaller gain than prime focus so a slightly larger dish may be needed
> and a separate dedicated dish for circular uplink. That is not to say
> it could not be done, but to have both at the same focal point is not
> a good idea.
> A rotator is not needed for EsHail as it is proper geostationary.
> So do you currently have satellite TV, how big, and what satellite is
> it pointing at?
> Also what is your location?
> On 01/06/2016, Robert Bruninga <bruninga at usna.edu> wrote:
> > Im not following this closely, but if the bands were cross polarized, it
> > should be possible...?
> > Bob, WB4APR
> > -----Original Message-----
> > From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of John
> > Sent: Wednesday, June 01, 2016 1:23 PM
> > To: Žilvinas Atkočiūnas
> > Cc: amsat-bb at amsat.org
> > Subject: Re: [amsat-bb] EsHail Microwave transponder satellite
> > I don't think it is possible to create a dual-band dish feed that covers
> > 2.4 and 10.5 GHz. AMSAT folks are working hard on a 5G/10G dual-band
> > and that is difficult. Even more complicated is your desire to use a
> > commercial 10G satellite TV LNB as one of the two feeds. I think you are
> > going to have to use two antennas for those 2 bands. The 10G dish with
> > satellite TV LNB for one of them, and either a separate dish or a loop
> > or something else for the uplink. A Yaesu Az/El rotor can handle a pair
> > antennas, in fact it is almost a re
> > On Wed, Jun 1, 2016 at 6:19 AM, Žilvinas Atkočiūnas <
> > zilvinas.atkociunas at gmail.com> wrote:
> >> Hi all,
> >> Any ideas how to use two antennas with single dish ? (one of them SAT
> >> LNB)
> >> LY2SS
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