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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/TGWA73JLFRUEVBYFPRSPAVLFDHYCNGSI/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "TGWA73JLFRUEVBYFPRSPAVLFDHYCNGSI",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/TGWA73JLFRUEVBYFPRSPAVLFDHYCNGSI/",
    "sender": {
        "address": "k0vty (a) juno.com",
        "mailman_id": "69d7c9bb693a4435bee46454dd0afb25",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/69d7c9bb693a4435bee46454dd0afb25/emails/"
    },
    "sender_name": "[email protected]",
    "subject": "[amsat-bb] Re: 2 ghz antenna question",
    "date": "2007-08-09T02:59:05Z",
    "parent": null,
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/PJKCNZGWE7FZIJ3M2REE4YCSD3SHJEGW/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Chris\n\nI have had a 15 mile one way , 2 gHz, 3 foot, 100 mw, RF link for \nmy ISP for 7 years now, and it has never given me a problem.\nA 50 foot run of LMR 400 is used here.\nMy grid dish has 23 dbi gain.\nA Cisco model 350 is in my computer.\nI will assume for the moment my experiences somehow fit your situation\nand might be useful to you.\nI use a telescoping Radio Shack mast to mount a vertically polarized \nGrid dish.\nThe mast is mounted on a lower roof level , using an upper roof peak\nbracket to stabilize the mast.\nIt is a good solid mounting.\nThe antenna is looking down a water shed that falls away at 3 foot per\nmile.\nThat clear all the trees.\nTrees are a real bad attn on 2.4 gHz\nThe grid  dish is mounted vertically ( dish rods in the vertical plane)\nbecause the ISP uses that polarization.\nIf I were to consider using two dishes I would test two dishes side by\nside.\nDiversity reception ( using two receivers ) of two stacked vertically\nmight cancel some signal when mama nature does her tricks.\nWhere as what ever trick mama nature has in store should remain the same\nfor two antennas side by side.\nThe effective aperture of a dish is the physical size of the dish so\nthe distance between is not as critical.\nWhere as the above and below mounting has to do with how mama moves the\nsignal vertically over time.\n\nI hope this has provided some food for thought\n\nJoe  K0VTY\n==================\nOn Wed, 08 Aug 2007 16:56:02 -0700 Chris Huber <[email protected]>\nwrites:\n> Hello,\n> \n> I know this is off subject, I am looking for ideas on stacking 2 \n> antennas.\n> I am doing a 25 mile WiFi link on 2 GHz using 1  3 foot grid dish \n> with \n> horizontal polarity. I have a power divider and a second dish that I \n> \n> want to mount directly above the first antenna.\n> \n> Is the vertical spacing critical?  Is there any advantage over close \n> \n> spacing,  ie. increase gain or wide spacing to give better path fade \n> \n> protection.\n> \n> Thanks for your time.\n> \n> Chris N6ICW\n> _______________________________________________\n> Sent via [email protected]. Opinions expressed are those of the \n> author.\n> Not an AMSAT-NA member? Join now to support the amateur satellite \n> program!\n> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n> \n> \n",
    "attachments": []
}