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.

Zilvinas 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@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@amsat.org] On Behalf Of John Toscano Sent: Wednesday, June 01, 2016 1:23 PM To: Zilvinas Atkociunas Cc: amsat-bb@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@gmail.com> wrote:

...

Hi all,

Any ideas how to use two antennas with single dish ? (one of them SAT LNB)

LY2SS