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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ANABFMICWZHK3GICCHEHO2H4M33QWLSA/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "ANABFMICWZHK3GICCHEHO2H4M33QWLSA",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/5A7PZPE3PTIU6UJAMHD4KAPUZ6OU6WKX/?format=api",
    "sender": {
        "address": "greencl (a) mindspring.com",
        "mailman_id": "5421c5ff9a12494f8f7bd304db4ac696",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/5421c5ff9a12494f8f7bd304db4ac696/emails/?format=api"
    },
    "sender_name": "Chuck Green",
    "subject": "[eagle] Re: AO-51 Multiband Antenna???",
    "date": "2007-09-04T03:22:56Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/AGVKAZVNH724K6ZPG3SKEEY463VI54EJ/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/BIN6S6WBQXYYYLQANHPJHZO73LZJ6BKX/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Guys,\n\nLet me take my best shot at what I'm reading here... there is \nconfusion.  I think the confusion comes from mixing the term \n\"multi-band\" with \"variable frequency receive, aka SQRX\".  They have \nnothing to do with each other.\n\nThe multi-band antenna is an L/S antenna.  That's it.  It's a beautiful \npiece of work by Stan.\n\nThe SQRX is fed from a splitter that is fed from the VHF antenna.  The \nmajority of the antenna signal goes to a preamp and then is split four \nways to feed the four VHF receivers.  The smaller portion of the antenna \nsignal goes to the SQRX.  I believe this antenna was designed by Mark \nKanawati, but I'm not sure.\n\nIf you want to see a couple of thousand pictures, including many of the \ninternals of the satellite, you can look at my collection at \nhttp://bach.as.arizona.edu/gallery/main.php?g2_itemId=3759\n\nI hope this helps,\nChuck\n\n\n\nGould Smith wrote:\n> As Drew said Stan designed it, with maybe help from Lou.\n>\n> I was told that it is an L Band antenna with S band stubs.  There is a \n> ground plane under it with radials for L and S band.\n> I wasn't able to get specifics about gain when I did the book.\n>\n> Gould\n> ----- Original Message ----- \n> From: \"Andrew Glasbrenner\" <[email protected]>\n> To: \"Bill Ress\" <[email protected]>; <[email protected]>\n> Sent: Monday, September 03, 2007 8:06 PM\n> Subject: [eagle] Re: AO-51 Multiband Antenna???\n>\n>\n>   \n>> Stan Wood designed it. It is a dual band L and S antenna, linearly\n>> polarized. I'm not sure what sort of \"in orbit data\" you are looking for,\n>> but it is in use whenever the L band uplink or S band downlink is in use\n>> including later this month.\n>> http://n4hy.smugmug.com/gallery/2107663#108915239 has good pics of the\n>> antenna.\n>>\n>> Something in particular you'd like to try?\n>>\n>> 73, Drew KO4MA\n>>\n>> ----- Original Message ----- \n>> From: \"Bill Ress\" <[email protected]>\n>> To: <[email protected]>\n>> Sent: Monday, September 03, 2007 7:54 PM\n>> Subject: [eagle] AO-51 Multiband Antenna???\n>>\n>>\n>>     \n>>> Perhaps one of you can detail the \"multiband antenna\" used with the SQRX\n>>> receiver aboard AO-51.\n>>>\n>>> A perusal of Gould Smith's \"ECHO\" makes reference to it but provides no\n>>> details.\n>>>\n>>> Does anyone have any in orbit data for this mode. What's the current\n>>> status for its use?\n>>>\n>>> Regards and thanks...Bill - N6GHz\n>>>\n>>> _______________________________________________\n>>> Via the Eagle mailing list courtesy of AMSAT-NA\n>>> [email protected]\n>>> http://amsat.org/mailman/listinfo/eagle\n>>>       \n>> _______________________________________________\n>> Via the Eagle mailing list courtesy of AMSAT-NA\n>> [email protected]\n>> http://amsat.org/mailman/listinfo/eagle \n>>     \n>\n> _______________________________________________\n> Via the Eagle mailing list courtesy of AMSAT-NA\n> [email protected]\n> http://amsat.org/mailman/listinfo/eagle\n>\n>   \n",
    "attachments": []
}