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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/5NB5PFV7QVE3AUXHNRXYVV6HIVWVIVYD/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "5A5DD165B04348CB8D902E52704AD518@acer61a4596bd3",
    "message_id_hash": "5NB5PFV7QVE3AUXHNRXYVV6HIVWVIVYD",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/MRKQZ3XA5BS6LYNOFJXFPRVAZOL5H4HI/?format=api",
    "sender": {
        "address": "aa5jg (a) fidmail.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "John Geiger",
    "subject": "[amsat-bb] Re: Enhance your Easy Sat Experience!",
    "date": "2012-01-06T05:35:53Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/5F2W6M7XL5LOH6UJI7QFGML37FC6COII/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "There was a FT530 going for $50 today on QRZ.COM.  That is one of the best \nfull duplex HTs made. . You can usually find a W32A for $150 or so also.  I \nhave also seen lots of Alinco DJ-580s recently for good prices as well.\n\n73s John AA5JG\n\n----- Original Message ----- \nFrom: \"Gary \"Joe\" Mayfield\" <[email protected]>\nTo: \"'AMSAT'\" <[email protected]>\nSent: Friday, January 06, 2012 5:28 AM\nSubject: [amsat-bb] Re: Enhance your Easy Sat Experience!\n\n\n> There used to be a list of full duplex radios at\n> http://thathamkid.com/fd_radios.html\n>\n> But that web seems to be dead.  Many of the full duplex handhelds can be \n> had\n> for little more than a song on eBay.\n>\n> 73,\n> Joe kk0sd\n>\n> -----Original Message-----\n> From: [email protected] [mailto:[email protected]] On\n> Behalf Of Clayton Coleman W5PFG\n> Sent: Thursday, January 05, 2012 9:43 PM\n> To: AMSAT\n> Subject: [amsat-bb] Enhance your Easy Sat Experience!\n>\n> Have you thought about upgrading your station to full-duplex capability?\n>\n> I realize that many amateurs jump into the satellite fray by utilizing\n> an existing handheld radio and an antenna like the Arrow, Elk, or\n> tape-measure beam. It's a great way to get your feet wet and make\n> that \"first\" contact via the birds.\n>\n> Now, let's look at how we can do BETTER.\n>\n> Full-duplex has a very important purpose in the satellite world. It\n> allows you, the ground station, to know that your signal is being\n> received and retransmitted by the satellite. I'm not saying it is a\n> mandatory but once you see its benefit, you may never want to go\n> \"semi\" again.\n>\n> How do you really know you are being heard by the bird if you can't\n> hear yourself? Answer: You don't.\n>\n> How do you know another station wasn't already being captured by the\n> bird and in the middle of a QSO when you transmit? Answer: You don't.\n>\n> Let's talk about HOW to do full-duplex. First of all, you don't need\n> base-station radios like the Icom IC-9100, IC-910, Kenwood TS-2000, or\n> Yaesu FT-847. If you own two handhelds, chances are you have what you\n> need!\n>\n> What you need is at least one radio capable of transmitting on the\n> uplink and one radio capable of receiving on the downlink. For\n> example using AO-27:\n>\n> 1. A 2m-only HT, set to the satellite's uplink, ~145.85 MHz.\n> 2. A 70cm-only HT, set to the satellite's downlink, ~436.795 MHz.\n>\n> One added benefit is that while hearing the downlink, you can twist\n> your handheld\n> antennas (like the Arrow) to match polarity and peak your uplink.\n>\n> Technically you do not even need a radio capable of transmitting to\n> hear yourself on the downlink. A scanner or pocket receiver works\n> dandy!\n>\n> To get into full-duplex inexpensively, there are numerous options.\n> You can buy a NEW Baeofeng UV-3R for about $50-60 USD, shipped. This\n> radio could serve as an uplink or downlink radio, depending on your\n> need. I'm not peddling these radios but using them as an example.\n>\n> If you have the Arrow with the built-in diplexer, simply bypass it by\n> running a patch cord from each radio to the respective UHF and VHF\n> beams. If you are running an Elk or tape-measure 2m beam, you will\n> need an inexpensive diplexer to give you both 2m and 70cm feed points.\n> One can be constructed easily or purchased from numerous vendors for\n> $30-80.\n>\n> Give full-duplex a try. You will not only help the satellite\n> community by eliminating unnecessary hetero-dyning tug-of-war, it will\n> generally make you sound better on the birds! Oh, and use a pair of\n> earphones or a headset when you give it a try to avoid feedback.\n>\n> 73,\n> Clayton\n> W5PFG\n>\n> Here are some more example full-duplex combinations:\n>\n> Wouxon HT - Downlink\n> 2m only-HT - Uplink\n>\n> FT-60R - Uplink\n> Baofeng - Downlink\n>\n> Handheld scanner - Downlink\n> Dual-band HT - Uplink\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> _______________________________________________\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": []
}