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    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ACSHSHG7ZTMBYWTSEGWBCUNDHF5CYQXQ/?format=api",
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    "message_id": "CACZz0S0=dvmya4_aP3y5UsYu7Lh-zuVuqbkpM=8P3-WWP7Rj+g@mail.gmail.com",
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    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/XI7I2NDDUN6TEUQJP6PFSRM2JQIW5VCO/?format=api",
    "sender": {
        "address": "ks1g04 (a) gmail.com",
        "mailman_id": "30590cddbe684a52a5c3c945059cdd06",
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    },
    "sender_name": "Stephan Greene",
    "subject": "[AMSAT-BB] Re: Question: Diamond D130J for Satellite Use?",
    "date": "2021-10-18T01:07:50Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WGFEHIWZGDMJ7NDY4VGSNBZILU4AFO2Q/?format=api",
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    "content": "Omnis **may** work in specific situations.  KB1HY uses eggbeaters quite\nwell.  He is on a 1,000ft hill so has good horizons and presumably RF quiet\nlocation.  Omnis can also work for very strong downlinks, e.g. ISS\n(particularly their SSTV transmissions).  There's at least one rover using\na pair of passive Lidenblads (AMSAT published designs), yes he worked RS44;\nalso he prefers CW and was operating from very remote and RF quiet\nlocations.  I've successfully monitored brief portions of Fox-1 series\npasses from my car (1/4 or 5/8 whip omni) but it was marginal at best.  My\nSATNOGs station uses vertically polarized omnis and performance is\nmediocre.  (Speaking of satnogs, perusing those stations that identify\nantenna types and looking at their captures, or scheduling a few\nobservations of CAS4A/B, the XW birds, JO97,... may be useful to see how\nwell it works or doesn't in the real world. YMMV.)  Omnis in my QTH are a\nwaste of time and effort other than \"is the bird on?\" (maybe).\n\nSince I don't know the OP's situation, I'd experiment.  1/4 wave verticals\nare cheap and easy to make and mount temporarily on a mast or pole, or at\nground level (WB4APR has written about this for capturing ISS packets).\nTry it and see how good or bad are the results, particularly receiving the\ndownlinks.  If PO-101, AO-91, and CAS4A/B are copied well, it may be worth\npursuing further.  If not, I'd look at driveway/backyard portable with an\nArrow or Elk, or fixed elevation with an azimuth rotator; antennas can be\ntape measure yagis or WA5VJB Cheap Yagi designs.  Upgrade to Az/El and CP\nantennas if the bug bites.\n\n73 Steve KS1G\n\nOn Sun, Oct 17, 2021 at 8:46 PM Jim Walls <[email protected]> wrote:\n\n> On 10/17/2021 15:32, Richard AG5M via AMSAT-BB wrote:\n>\n>\n> *Specially I asked about the M2 Egg Beater antenna system.  No bad words\n> about it, and I now know the M2 Leo Pack is \"the\" de-facto satellite\n> antenna system. *\n>\n>\n> I'll give you bad words.  ANY omni antenna for satellite will be very\n> marginal at best.  I built a Egg Beater clone years for use as a packet\n> downlink gateway station for one of the early packet satellites.  In\n> several years, if I got ONE packet to decode per day, it was doing well.\n>\n>\n> *A Ham mentioned an antenna I never thought about, the Diamond D130J\n> Discone.  It would seem it too, especially given its low cost, is a viable\n> choice for someone just getting their feet wet without spending a lot up\n> front to get started.  I have everything I need, other than the antenna. *\n>\n>\n> Same general answer, I would think a discone would not work very well.\n>\n> --\n> 73\n> -------------------------------------\n> Jim Walls - [email protected]\n> Ofc:  818-548-4804http://members.dslextreme.com/users/k6ccc/\n> AMSAT Member 32537 - WSWSS Member 395\n>\n>\n> -----------------------------------------------------------\n>\n\n\n",
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