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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/LKPBYTFVZA6CLBULUMIKII3QSLIYHCW6/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "LKPBYTFVZA6CLBULUMIKII3QSLIYHCW6",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/QDDJFTIIRSHJJFNZLMGEBOP3L642QUIX/",
    "sender": {
        "address": "broberts (a) mta.ca",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Bruce Robertson",
    "subject": "[amsat-bb] Re: DX LEO records, fixed elevation category",
    "date": "2007-03-09T13:36:22Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/IB346HBBLOEXZZIZRYT7OY56IUYFGQHN/",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/HGRJCGKCUSVACXGXBVCGLAJCIU2DAMXU/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Quoting Anthony Monteiro <[email protected]>:\n\n> At 11:07 PM 3/8/2007, Bruce Robertson wrote:\n> >Many of us have been encouraging the newcomers to this list to avoid\n> >elevation rotors if they want to begin with a simple, less expensive\n> >station. (It is unfortunate that as recently as my 2006 edition, the\n> ARRL\n> >Handbook states that az/el rotation is necessary. I wonder if someone\n> >should contact them and offer a rewrite.) As evidence of the\n> effectiveness\n> >of such a station, I offer the following two QSOs (chosen merely\n> because I\n> >was writing up the QSL cards). I also submit them as the first entries\n> in a\n> >fixed-elevation DX bragging thread:\n> >\n> >VE9QRP (FN75tv) to IW4DVZ (JN54IM) 5600 km\n> >\"             \" to OK2UFB (JN99as) 5847 km\n> \n> \n> Dear friends,\n> \n> I agree with Bruce, you do not need fancy antennas\n> to work DX on LEO satellites. Here are a few I found in my log\n> that were completed using just omni-directional antennas\n> - NO rotors at all:\n> \n> AA2TX (FN20) to:\n>          PA0TAU (JO22) 5987 Km\n>          SM6DJE (JO99) 6411 Km\n>          OM3MM  (KN09) 7084 Km\n> \n> The distances were calculated using:\n> http://home.arcor.de/waldemar.kebsch/The_Makrothen_Contest/fmaidenhead.html\n> \n> \n> Best DX and 73,\n> Tony AA2TX\n> \n\nSadly, the International Panel of Judges (my cats, Oreo and Starry) has\ndetermined that omni-directional antennas belong in a separate category,\nthereby preserving VE9QRP's fixed-elevation directional antenna records for\nanother 3h :-)\n\nOn a more technical note, Tony are these with your Lindenblads described in\nthe latest Symposium proceedings? I'm a bit confused about the performance\nof omni-directional circular polarized antennas. I have been told that LEO\nsatellites tend to switch from RHCP to LHCP as they change their\norientation and that, therefore, it is best to include polarity switching\nin a CP yagi. Does this same phenomenon cause deep fades in an antenna like\nthe Lindenblads, despite the ideal radiation (reception) pattern? Also, how\ndoes one deal with the 2m LHCP/RHCP kerfuffle in, for example VO-52\ndownlink and FO-29 uplink? \n\n(I'm using this helpful list as my data:\nhttp://www.amsat.org/amsat/archive/amsat-bb/200603/msg00293.html\n)\n\nFinally, does anyone have a more recent ARRL Handbook? If so, can you check\nif it persists in suggesting that an az/el rotor is an important asset for\nfixed-station, LEO satellite work? If it does we should seek to have it\nreplaced with material based on more recent articles in QST that contradict\nthis. I'm sure I'm not the only one who browses through the handbook to see\nwhat assets I have for undertaking new modes: if people knew it was just a\nmatter of putting two short beams on one boom and tilting them up 20 deg.,\nthey might be more likely to give it a go.\n\n\n\n-- \nBruce Robertson, \nDept. of Classics, Mount Allison University\nhttp://heml.mta.ca\n",
    "attachments": []
}