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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/BDGEKT2XUZUHFDTJ4MATJ4FJ4AMTGEAQ/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "CAN6TEUcs1093+pAjNAzH7oyXWYhVS1VMoKc-eNc4HG+An=Y7WA@mail.gmail.com",
    "message_id_hash": "BDGEKT2XUZUHFDTJ4MATJ4FJ4AMTGEAQ",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/GEZA2WF3SDBMQM2S7I6AREQ5OODIT7BM/?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] Financial arguments about full duplex",
    "date": "2016-06-28T16:35:08Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/2L5UOZMFDEA3MZSVYRQJO2HDKCVPGIP6/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Jerry!\n\nI had written about using certain Chinese-made dual-band HTs to\nwork AO-85 full-duplex a few months ago on this list, and an\narticle based on those posts appeared in a recent AMSAT Journal.\nBut that is not the only way, or even the cheapest way, to get on\nAO-85 (or other U/V FM satellites) full-duplex. I, like many others\nreading this list, have worked stations using two Baofeng HTs and\na homebrew 2m/70cm Yagi like the WA5VJB design. Two Baofengs\nshould be in the $60 to $70 range, and a homebrew Yagi a few\ndollars more in parts. Basically, for less than $100, a ham can\nhave a station capable of full-duplex operation for FM satellites.\nIf someone already has an HT, then the costs for a second radio\nand parts for a 2m/70cm homebrew Yagi become more like $40 or $50.\n\nAs I mentioned in other recent posts on here, I worked an FM satellite\npass during Field Day half-duplex, on LilacSat-2 (like SO-50,\nusing a 2m uplink and 70cm downlink). It can be done, but many of us\nhear the complaints from those who have tried the half-duplex\napproach unsuccessfully. If anything, the advice about working\nFM satellite full-duplex is an attempt to set expectations for success\non these satellites. Yes, half-duplex can work, but full-duplex\nworks better.\n\nAs for the linear transponders, that will take different equipment\nwhere there really isn't the same inexpensive option as we have with\nthe Chinese-made HTs for FM satellites. There are options to hold\ndown the costs for equipping your station to work these satellites.\nUsing a pair of all-mode HF/VHF/UHF transceivers, or one of those\ntransceivers with a software-defined receiver, are a couple of\nexamples of this. But it can be done.\n\nGood luck, and 73!\n\n\n\n\n\nPatrick WD9EWK/VA7EWK\nhttp://www.wd9ewk.net/\nTwitter: @WD9EWK\n\n\n\n\n\n\nOn Tue, Jun 28, 2016 at 3:32 PM, Jerry Conner via AMSAT-BB <\[email protected]> wrote:\n\n> That is what I have done, built a cheap antenna.  I have a Chinese radio\n> and I have made contacts on SO-50, half duplex.  I DO NOT get on the linear\n> birds because primary I do not have the means to run 2M/70CM SSB. I can\n> also understand that it would near impossible to effectively make a contact\n> But newbies can/should be given guidance in the form of Elmers. Not being\n> told they are not welcome if they don't have the equipment others have.  By\n> the way check the prices an arrow antenna that will give someone the best\n> chance to get into AO-85 with a Cheap Chinese radio is about $150.00.\n> I love VHF/UHF but I can't do much more than be a spectator at this point\n> due to the equipment required.  I will get there eventually.\n>\n> I am just trying to point out that not everyone has the ability and may\n> never have the ability work the satellites with the gear that others have.\n> I would love to have a way to do so but for now it is not in the cards in\n> my household.  I am OK with that.\n>\n> So when the arrows start flying try not to hit the people that you should\n> be trying to bring in the fold to help, in any way they can, put more\n> satellites in orbit for us all to enjoy.  Just my viewpoint from down here.\n> 73\n> Jerry W4JWC\n>\n>\n",
    "attachments": []
}