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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/KKFXCIO3KILBWWJN4YEWE3L76T6OSXHC/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "KKFXCIO3KILBWWJN4YEWE3L76T6OSXHC",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/YN4VFAPBSRDQ266PENZ5YQG2J3KE5IRQ/?format=api",
    "sender": {
        "address": "tmm (a) trutter.dk",
        "mailman_id": "10de34676c744742b49d3ccde2c51c85",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/10de34676c744742b49d3ccde2c51c85/emails/?format=api"
    },
    "sender_name": "Martin",
    "subject": "[amsat-bb] Re: true duplex radios",
    "date": "2009-06-02T19:02:39Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4S4RQ4WHCKUY7KOSSDN245AX7D5GUAOQ/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/LB77YBJWXHCDC2VEJYV7RUNH64E737UG/?format=api",
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/7ACRWYARJ7W7RGBUAHXWBPC4E7PDSUQJ/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Jim and others.\n\nFor ordinary Repeaters the Rx/Tx in the same band is mandatory. But just \nthink of the filtering needed for TX'ing lots og watts just 600kHz away \nfrom your Rx-frq.\nThis is also the reason why most repeaters (at least that I know of) \nuses really big cavity-filters.\n\nBut for Rx/Tx on the same frequency - Forget it. What would be the \npurpose anyway?\n\nIn my terms, a full-duplex radio is a radio that listens on one band, \nwhilst transmitting on another.\n\nRegards\nOZ1TMM, Martin\n\n\nJim Heck wrote:\n> Hi All,\n> \n>   In my experience, you dont have to listen to the output channal of a repeater,\n> while transmitting to its input, ie you dont have to hear your own signals coming\n> back through the repeater. BUT you do (ideally) when working through a satellite.\n> \n>   Again im my experience, such a radio as Greg has described is called a \"half\n> duplex\" one.\n> \n>   The big advantage of using a full duplex radio for satellites is that you can\n> check if you are being rebroadcast by the satellite or not, without relying on\n> others to tell you. (You can also change the polority of the up link signal, for\n> maximium smoke!)\n> \n> 73 Jim G3WGM\n> \n>> -----Original Message-----\n>> From: [email protected] [mailto:[email protected]]On\n>> Behalf Of Greg D.\n>> Sent: 02 June 2009 07:12\n>> To: [email protected]; [email protected]\n>> Subject: [amsat-bb] Re: true duplex radios\n>>\n>>\n>>\n>> {queue thunder clap}\n>>\n>> Wait a minute...  How can a radio be capable of cross-band repeat and not\n>> be full duplex?  I believe the answer is no.  Cross-band (analog)\n>> repeating is inherently full duplex.  So, perhaps this is a simple way to\n>> ask a non-satellite person, without having to explain what duplex means.\n>>\n>> By the way, my Alinco DR-610 mobile rig is also full-duplex.  You may add\n>> it to the list.  (In fact, it's got some down-right-weird modes, between\n>> the two sides of the radio, that it's sometimes anyone's guess what will\n>> happen when you key up.)\n>>\n>> Greg  KO6TH\n>>\n>>> From: [email protected]\n>>> To: [email protected]\n>>> Date: Mon, 1 Jun 2009 12:37:16 -0700\n>>> Subject: [amsat-bb] Re: true duplex radios\n>>>\n>>>  >> ... Yaesu FT-8800 ...\n>>>\n>>> Really? Dual-receive, indeed. And will perform crossband repeating.\n>>> But I can transmit on one band and simultaneously hear myself on\n>>> another with a FT-8800?\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>> Lauren found her dream laptop. Find the PC that’s right for you.\n>> http://www.microsoft.com/windows/choosepc/?ocid=ftp_val_wl_290\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>> No virus found in this incoming message.\n>> Checked by AVG - www.avg.com\n>> Version: 8.5.339 / Virus Database: 270.12.48/2147 - Release Date:\n>> 05/31/09 20:45:00\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": []
}