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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/D4WO6KEZ4CEFCVA2WYB5BCDOBS56HGZC/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "D4WO6KEZ4CEFCVA2WYB5BCDOBS56HGZC",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/Q3YFSTTIY5ZPUZMC3YBFOE6QBHY7BZMX/?format=api",
    "sender": {
        "address": "on4hf (a) telenet.be",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Eric Knaps, ON4HF",
    "subject": "[amsat-bb] Re: Working SO-50",
    "date": "2011-12-04T12:25:12Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/Q3YFSTTIY5ZPUZMC3YBFOE6QBHY7BZMX/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hello Ib,\n\nI agree with you.\nThis is what I have in my Doppler.sqf file for SatPC32:\n\nSO-50,436790,145850,FM,FM,NOR,0,0\nSO-50,436795,145850,FM,FM,NOR,0,0\n\nand in my SubTone.sqf:\n\nSO-50,67.0,$3F,1\nSO-50,74.4,$3E,3\n\nThis is for the Yaesu FT-847.\n\n73,\nEric.\n\nAmateur Radio Station ON4HF\nEric Knaps\nSatellite manager UBA\n\n\nhttp://www.on4hf.be\n\n\nOp 3/12/2011 21:45, Ib Christoffersen schreef:\n> Working SO-50.\n>\n> I think it is time to look at how one can operate over SO-50 and the\n> problems that can be encountered.\n>\n> First the normal and nominal data:\n>\n> Uplink is at 145.850 MHz.  Downlink at 436.795 MHz.\n>\n> If it is not ON - use 74.4 Hz CTCSS tone to activate the transmitter for 10\n> seconds to have it on for nominally 10 minutes - when on use 67 Hz CTCSS\n> tone during your transmission.\n>\n> That was the intended normal operation.\n>\n> Now to the deviations from the normal scheme.\n>\n> The downlink frequency sometimes jump approximately 5 kHz. Therefore I have\n> two different frequencies pairs to be used in SATPC32:\n>\n> SO-50,436788.50,145849,FM,FM,NOR,0,0\n> SO-50,436795,145850,FM,FM,NOR,0,0\n>\n> If you do not use Full Doppler Tracking it is not much of an issue. Just\n> tune for best downlink.\n>\n> Talking about SATPC32 here are the entries for the CTCSS tone:\n>\n> SO-50,67.0,$3F,1\n> SO-50,74.4,$3E,3\n>\n> The first data is for the ICOM IC-910 radio. If you use another radio please\n> look at the information in SATPC32.\n>\n> Next problem is the change of polarity of the downlink signal during a pass.\n> The polarity changes during the pass. At least I have to switch polarity a\n> few times from RHCP to LHCP to optimize the downlink signal. That has been\n> confirmed by others. How it works using linearly polarized antennas I do not\n> know - but I think there will be some fading.\n>\n> And if that is not enough - at least here over Europe - we have to put up\n> with QRM on the uplink from a lot of different sources like repeaters and\n> people using our frequencies as cheap phone connections.\n> The result of the QRM is that it sometimes is difficult to turn SO-50 on.\n> Also the QRM may turn the transmitter off.\n>\n> And since the inclination is not sun synchronous we have to live with a\n> steady change of pass times over the year.\n>\n> Some may think I am not a fan of SO-50. That is not the case. It is a very\n> good satellite we got for free and it works very well.\n> Already more people are using it over Europe after AO-51 is not with us any\n> more. That just took a couple of days.\n>\n> 73 OZ1MY/Ib\n>\n>\n>\n> _______________________________________________\n> Sent via [email protected]. Opinions expressed are those of the author.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>\n",
    "attachments": []
}