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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/OAX7QFUAFN74PJF5TBGDH32GCUY2MHSR/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "OAX7QFUAFN74PJF5TBGDH32GCUY2MHSR",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/OAX7QFUAFN74PJF5TBGDH32GCUY2MHSR/?format=api",
    "sender": {
        "address": "lucleblanc6 (a) videotron.ca",
        "mailman_id": "9e00802147284c40880480833e06c230",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/9e00802147284c40880480833e06c230/emails/?format=api"
    },
    "sender_name": "Luc Leblanc",
    "subject": "Re: [amsat-bb] EsHail Microwave transponder satellite",
    "date": "2016-06-02T04:14:43Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "\n\n\n\n\n\nIn the AO-40 era i was using this setup to mount one dish and one BBQ grill antenna on the \nsame mount. I could also mount another smaller dish on this mounting.\n\nSee pictures on http://www.qsl.net/ve2dwe/\n\n\n\nLuc Leblanc VE2DWE\n\n\n\n\n\n> > I asked a manufacturer of feeds (...) and they said\n> > a dual feed was not possible. Uplink is circular and\n> > downlink is linear using a normal LNB.\n> \n> But linear is a subset of \"circular\", so, couldn´t we use a dish that is 40%\n> larger (to make up the 3 dB loss of going linear) and use a linear feed on\n> the uplink so it can be cross polarized with the downlink and thus get maybe\n> 20 dB of isolation?  Maybe that 20 dB of isolation is still not enough?\n> \n> Bob, WB4aPR\n> \n> However many Europeans may have one dish for TV anyway. It is relatively\n> easy to mount two LNBs on one dish for 2 different satellite positions, so\n> one dish for household TV with a second LNB for Eshail sat, The LNB that is\n> offset from prime focus will see a smaller gain than prime focus so a\n> slightly larger dish may be needed and a separate dedicated dish for\n> circular uplink. That is not to say it could not be done, but to have both\n> at the same focal point is not a good idea.\n> \n> A rotator is not needed for EsHail as it is proper geostationary.\n> \n> Zilvinas\n> So do you currently have satellite TV, how big, and what satellite is it\n> pointing at?\n> Also what is your location?\n> \n> On 01/06/2016, Robert Bruninga <[email protected]> wrote:\n> > Im not following this closely, but if the bands were cross polarized,\n> > it should be possible...?\n> > Bob, WB4APR\n> >\n> > -----Original Message-----\n> > From: AMSAT-BB [mailto:[email protected]] On Behalf Of John\n> > Toscano\n> > Sent: Wednesday, June 01, 2016 1:23 PM\n> > To: Zilvinas Atkociunas\n> > Cc: [email protected]\n> > Subject: Re: [amsat-bb] EsHail Microwave transponder satellite\n> >\n> > I don't think it is possible to create a dual-band dish feed that\n> > covers\n> > 2.4 and 10.5 GHz. AMSAT folks are working hard on a 5G/10G dual-band\n> > feed, and that is difficult. Even more complicated is your desire to\n> > use a commercial 10G satellite TV LNB as one of the two feeds. I think\n> > you are going to have to use two antennas for those 2 bands. The 10G\n> > dish with satellite TV LNB for one of them, and either a separate dish\n> > or a loop yagi or something else for the uplink. A Yaesu Az/El rotor\n> > can handle a pair of antennas, in fact it is almost a re\n> >\n> > On Wed, Jun 1, 2016 at 6:19 AM, Zilvinas Atkociunas <\n> > [email protected]> wrote:\n> >\n> >> Hi all,\n> >>\n> >> Any ideas how to use two antennas with single dish ? (one of them SAT\n> >> LNB)\n> >>\n> >>  LY2SS\n> \n\n\n\n\n\n\n\n\n\n\n\n",
    "attachments": []
}