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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/AE2UGFHILWX7U2ZD4BTTNY5352KDGYPD/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "CAN6TEUcmmqbMRYbHCW9wKA0v4+=uxH+E4hjuBf5Ub16r-fezQw@mail.gmail.com",
    "message_id_hash": "AE2UGFHILWX7U2ZD4BTTNY5352KDGYPD",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/B52KBJKEFFCMKTTNSW5RU2CS5QHI774F/?format=api",
    "sender": {
        "address": "amsat-bb (a) wd9ewk.net",
        "mailman_id": "21664df01bef4757931b7cdb42a9e768",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/21664df01bef4757931b7cdb42a9e768/emails/?format=api"
    },
    "sender_name": "Patrick STODDARD (WD9EWK/VA7EWK)",
    "subject": "Re: [amsat-bb] ISS packet 70cm weak?",
    "date": "2016-12-18T18:06:37Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/B52KBJKEFFCMKTTNSW5RU2CS5QHI774F/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi!\n\nIf the two Ericsson HTs used on the ISS have the same power output,\n70cm signals should be weaker than what we heard on 2m. There\nwould be higher losses in the coax between the radio and antenna,\nalong with a higher path loss, using 70cm. I also notice that how\nI align my antenna is more important when working the ISS on\n437.550 MHz than when it was on 145.825 MHz.\n\nUplink issues could be similar to what is happening on the ISS.\nTransmitter power, coax loss, path loss... they all play a part\nin this.\n\nWith all of that said, I am able to deal with having to twist my\nElk log periodic more, and also changing frequencies (memory\nchannels in my HTs) to compensate for Doppler on 437.550 MHz. It\ntakes a little more work, but for me it isn't much different\nthan working ISS or the weaker NO-84 digipeater (when active)\non 145.825 MHz. I think the shift to 70cm has been harder for the\nhome stations that use vertical antennas, and the radios are not\nunder computer control. Those stations are having a tougher time\ncoping with the operations on 70cm. Based on some comments I have\nreceived directly and seen in a few online forums, those using\n2m/70cm verticals with gain are really struggling. The radiation\npatterns of many of those antennas on 70cm just isn't good for\nworking something up in the sky. Some of those antennas (for those\nin the Americas) are also tuned for 440-450 MHz, and perform\npoorly below that range.\n\nNot as many gateway stations are listening to 437.550 MHz, but there\nare a few using stations with computer control that are able to\ntrack the ISS as it goes across the sky. That has helped to populate\nthe listing and map on ariss.net, but is not a perfect replacement\nfor the many other stations that are on 145.825 MHz. Regardless\nof the number of gateways listening on 70cm, I'm still having fun\ntrying different antennas and seeing more stations give ISS packet\non 70cm a try.\n\n73!\n\n\n\n\n\nPatrick WD9EWK/VA7EWK\nhttp://www.wd9ewk.net/\nTwitter: @WD9EWK\n\n\n\n\n\n\n\nOn Sun, Dec 18, 2016 at 1:20 PM, PA3GUO <[email protected]> wrote:\n\n>\n> Anyone else finds the signals weak ?\n> Uplink as well as downlink?\n> Maybe worse in EU compared to other continents?\n> PA3GUO\n> Henk\n>\n>\n",
    "attachments": []
}