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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/VZKSGBCI7233VJAEZMYY3RIRYSNCVAE2/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "VZKSGBCI7233VJAEZMYY3RIRYSNCVAE2",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/VZKSGBCI7233VJAEZMYY3RIRYSNCVAE2/",
    "sender": {
        "address": "ko6th_greg (a) hotmail.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Greg D.",
    "subject": "[amsat-bb]  Cheap CP 2.4 ghz antenna?",
    "date": "2009-10-18T22:12:57Z",
    "parent": null,
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/FBB4FWAQKJBDNTN37LOFOLKNMF4QLSVH/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "\nHi folks,\n\nSo I have a pair of 14 dbi flat panel \"Wi-Fi\" antennas, complete with pigtail and N connector.  I assume they're linearly polarized.  Satellite downlinks really ought to be circular, if possible.\n\nFor satellite use, could I simply mount the two on my Az/El rotor boom, with one rotated 90-degrees from the other, and with a 1.23 inch shim behind it (for the 1/4 wave offset, if I did the math right), then combine the two antennas with a simple \"T\" connector?  The impedance would be wrong, but for Rx only, probably irrelevant.  I'd be feeding it into a Kuhne preamp, and from there to the Drake downconverter.\n\nAs a receive setup for the likes of AO-40, this probably wouldn't be all that good.  My 30\" screened BBQ Grill with helix feed, after all, was barely up to the job.  But for AO-51's V/US mode, I'd think it would be fine, offer a whole lot less wind resistance, and weigh a whole lot less too.\n\nSince AO-51's 2.4 ghz antenna is linearly polarized, it probably doesn't matter whether the result is left-hand or right-hand polarized, so it doesn't matter that I forget which \"hand\" rule to use for figuring it out...\n\nI've also heard that these panel antennas may have great numerical gain, but also have a lot of loss (cheap PC board materials), so maybe this isn't too good of an idea.  What do you think?\n\nGreg  KO6TH\n\n\n\n \t\t \t   \t\t  \n_________________________________________________________________\nHotmail: Trusted email with powerful SPAM protection.\nhttp://clk.atdmt.com/GBL/go/177141665/direct/01/",
    "attachments": []
}