[amsat-bb] EsHail Microwave transponder satellite
lucleblanc6 at videotron.ca
Thu Jun 2 04:14:43 UTC 2016
In the AO-40 era i was using this setup to mount one dish and one BBQ grill antenna on the
same mount. I could also mount another smaller dish on this mounting.
See pictures on http://www.qsl.net/ve2dwe/
Luc Leblanc VE2DWE
> > I asked a manufacturer of feeds (...) and they said
> > a dual feed was not possible. Uplink is circular and
> > downlink is linear using a normal LNB.
> But linear is a subset of "circular", so, couldn´t we use a dish that is 40%
> larger (to make up the 3 dB loss of going linear) and use a linear feed on
> the uplink so it can be cross polarized with the downlink and thus get maybe
> 20 dB of isolation? Maybe that 20 dB of isolation is still not enough?
> Bob, WB4aPR
> 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
> > Toscano
> > Sent: Wednesday, June 01, 2016 1:23 PM
> > To: Zilvinas Atkociunas
> > 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
> > feed, 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 yagi or something else for the uplink. A Yaesu Az/El rotor
> > can handle a pair of antennas, in fact it is almost a re
> > On Wed, Jun 1, 2016 at 6:19 AM, Zilvinas Atkociunas <
> > 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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