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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/GVQHWUAKWUGTZEPYXSCDC22BHT3D7JBA/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "003501c7e0f0$7f7b2c20$7e718460$@ca",
    "message_id_hash": "GVQHWUAKWUGTZEPYXSCDC22BHT3D7JBA",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/7XLSXKMSWPEIRPAWJ4SIMFM7JN3IZVIZ/",
    "sender": {
        "address": "fhaighton (a) cogeco.ca",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "R.Haighton",
    "subject": "[amsat-bb] Re: eggbeater II antenna performance oscar 50-52",
    "date": "2007-08-17T17:03:10Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/IMLFDCF6GEYNPITYCEUSN4KKFRLMSOHH/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": " Hi Pat, Just a couple of thoughts,\n\nYou need a preamp to strengthen the signal from the satellite to \n1) overcome any change of Polarity which may occur during reception.\n\n2) to strengthen  the signal to be stronger than any noise picked up in the\ntransmission line - which could compete with a week signal.\n\n3) to overcome any losses in the transmission line and it's connectors which\ncan be significant.\n\nPersonally I use a high quality, low Loss, well shielded transmission line,\nand a Pre-amp (capable of switching when RF is applied) and with a gain of\nat least 25 db and a very low noise factor < 0.9db\n\nI do get good results.\n\nRobin Haighton VE3FRH\nImmediate Past President AMSAT\nCanadian Representative to ARISS\nPast President BARC\nMember ARRL, RAC, RSGB, AMSAT-NA, AMSAT-UK.\n\n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On\nBehalf Of Patrick Green\nSent: Friday, August 17, 2007 9:15 AM\nTo: Amsat BB\nSubject: [amsat-bb] Re: eggbeater II antenna performance oscar 50-52\n\nWhat kind of feedline are you using for the UHF antenna?  This is meant as\nan open question to all related to this.  Do you *really* need a preamp\nbecause you are using something lossy and noisy like most braided shield\nfeedlines?\n\n73 de Pat --- KA9SCF.\nAmsat #35741\n\n>\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": []
}