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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/K4NS2WSAJKULKUTP4YYVWIZY5VGXYHOZ/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "28FB3EFA587A41C7BCA32835959DA616@KC6UQH",
    "message_id_hash": "K4NS2WSAJKULKUTP4YYVWIZY5VGXYHOZ",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/KOJAIKSUERZTJ3ASAAQKFLOPZNAS3Q2P/?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: Antenna Opinions?",
    "date": "2010-09-22T05:52:00Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/KOJAIKSUERZTJ3ASAAQKFLOPZNAS3Q2P/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/D6VUDOA7WBAL3OZEJQO6KMWJQE65DQCM/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Greg,\n I would keep the one that works the best. \nI have been disappointed in the performance of long boom Yagi's for UHF.\nResistance loss in the elements often reduces the gain by several dB over\ncalculated gain. Also they are very narrow band, the helix is good for an\noctave.\nArt,\nKC6UQH\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On\nBehalf Of Greg D.\nSent: Tuesday, September 21, 2010 10:04 PM\nTo: [email protected]\nSubject: [amsat-bb] Antenna Opinions?\n\n\nHi folks,\n\nSo, we had a swap meet a couple of weekends ago, and I found a bargain I\ncouldn't refuse.  Of course, now I need to decide what to do with it...  \n\nThe Find was a 35 element 1296mHz antenna, well built and in excellent\ncondition.  Linearly polarized, horizontal; supposed to be 23dBi gain.\nManufacturer, of course, is unknown.  No markings, but it does not look\nhome-built.  By the mounting hardware, it looks like it was part of some\nsort of stacked array.\n\nThe problem is that I already have a 1296mHz antenna.  Home-made, circularly\npolarized, 18 turns Helix.  Should be something like 17dBic, if the\ncalculations are correct.\n\nIn the shack, which is at the wrong end of 60' of 1/2\" hardline and a total\nof about 15' of RG-213 or something like it, I have my Yaesu 736R and its 10\nwatts of screaming RF power.  No preamps.\n\nWhich antenna should I keep up on the rotor assembly?\n\nLast weekend I put up the new antenna.  I've made one AO-51 LU pass with the\nnew antenna, and I was not impressed.  Several times I couldn't get into the\nbird, presumably because of the crossed polarization.  But when I did get\nin, it was full quieting, even at low elevations.  I don't recall having\nthis much trouble with the Helix.  I think AO-51 is the only current\nsatellite on L-band, right?\n\nFor other uses, there's nothing terrestrial to aim at, repeaters-wise;\nthey're all hiding behind one or more hills, or went off the air years ago.\nThat leaves Weak Signal work (hence the horizontal mounting).  I do have one\nshot into the valley, to the North West, but probably slim pickings for\ncontacts.  I haven't tried EME.\n\nI'm leaning towards putting the Helix back up, and passing the new one on to\nsomeone more able to use it.  What are your thoughts?\n\nThanks,\n\nGreg  KO6TH\n\n \t\t \t   \t\t  \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__________ Information from ESET NOD32 Antivirus, version of virus signature\ndatabase 5468 (20100921) __________\n\nThe message was checked by ESET NOD32 Antivirus.\n\nhttp://www.eset.com\n\n\n \n\n__________ Information from ESET NOD32 Antivirus, version of virus signature\ndatabase 5468 (20100921) __________\n\nThe message was checked by ESET NOD32 Antivirus.\n\nhttp://www.eset.com\n \n\n",
    "attachments": []
}