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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/VI55NLPLNYFAVPO7JMCNOF2SSE4IW7FU/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "FC8EDADDBE174296AA2ED1D8C121CD6B@KC6UQH",
    "message_id_hash": "VI55NLPLNYFAVPO7JMCNOF2SSE4IW7FU",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/ZTEGSSHS7VXDQ76GK4X2Q4E6TMD47NJI/?format=api",
    "sender": {
        "address": "kc6uqh (a) cox.net",
        "mailman_id": "d9201820d18047e4a2772c86bda5e111",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/d9201820d18047e4a2772c86bda5e111/emails/?format=api"
    },
    "sender_name": "Art McBride",
    "subject": "[amsat-bb] Re: J-Pole Antenna",
    "date": "2013-05-13T04:22:13Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WNQAPSQ7XRFCS7CBVZRR7I4HWKHY3KID/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/2NRSWRPVITW5L7TGHAJJOQTN2LSAJKTM/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Jeff,\nYou are correct, a J Pole is an end fed dipole on its side. Max gain at the\nhorizon and extinction at 90 degree elevation. The J section is for matching\nand does not radiate. Gain = 2.1 dBi at the horizon.\n\nArt,\nKC6UQH\n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On\nBehalf Of Jeff Moore\nSent: Sunday, May 12, 2013 10:48 AM\nTo: [email protected]\nSubject: [amsat-bb] Re: J-Pole Antenna\n\nI wouldn't recommend a J-pole for satellite work unless you expect to \nonly work sats on the horizon.  The J-Pole antenna has a low take-off \nangle and almost NO radiation overhead,  an plain 1/4 wave ground plane \nantenna would work better for the sats.\n\n\n\nJ-poles are great terrestrial communications antennas, not so much for \nworking overhead satellite passes.  An Eggbeater or quadrifiliar antenna \nwould be a better choice.\n\n7 3\n\nJeff Moore  --  KE7ACY\n\nOn 5/12/2013 8:00 AM, Werner, HB9BNK wrote\n> Thank you all for your valuable hints and advices !\n>\n> I will now build such an antenna and then supply here the results.\n>\n> 73 Werner, HB9BNK\n\n_______________________________________________\nSent via [email protected]. Opinions expressed are those of the author.\nNot an AMSAT-NA member? Join now to support the amateur satellite program!\nSubscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n\n",
    "attachments": []
}