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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/TBKI4DZJZNAWPOZB26YUAPXDURSTZLWV/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "TBKI4DZJZNAWPOZB26YUAPXDURSTZLWV",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/PRZCQMAQXYJVRCYZBGBLGB742MLF7JBI/?format=api",
    "sender": {
        "address": "elanportnoy (a) yahoo.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Elan Portnoy",
    "subject": "[amsat-bb] Re: accidental RF into wrong cable of Arrow=bad duplexer?",
    "date": "2009-10-11T21:28:43Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/PRZCQMAQXYJVRCYZBGBLGB742MLF7JBI/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Duplexer are bi-directional. Essentially passive bandpass filters--don't care which way he RF flows.\n\n--- On Sun, 10/11/09, Tim Goodrich <[email protected]> wrote:\n\n> From: Tim Goodrich <[email protected]>\n> Subject: [amsat-bb]  accidental RF into wrong cable of Arrow=bad duplexer?\n> To: [email protected]\n> Date: Sunday, October 11, 2009, 3:51 PM\n> I am an owner of a 2m/70cm LEO\n> satellite antenna with duplexer in the\n> handle. Sometimes, I operate full duplex (two radios) and\n> bypass the\n> duplexer by attaching my own cables to the separate parts\n> of the antenna (1\n> radio for 2m, 1 radio for 70cm). In the course of rushing\n> to catch a\n> satellite pass, I mixed up my connections and accidentally\n> transmitted (5\n> watts) into one of the arrow antenna cables, causing RF to\n> feed backwards\n> into the duplexer.\n> \n>  \n> \n>  Recently, I have noticed decreased performance (poor\n> reception, lower S/N,\n> even on AO-51 when in the past it was full quieting) and am\n> trying to\n> ascertain if it could have anything to do with my mistake\n> of feeding RF in\n> the wrong direction into the duplexer. Could my mistake\n> cause this problem?\n> \n>  \n> \n> Thanks,\n> \n> Tim\n> \n> KI6VBY\n> \n>  \n> \n>  \n> \n> _______________________________________________\n> Sent via [email protected].\n> Opinions expressed are those of the author.\n> Not an AMSAT-NA member? Join now to support the amateur\n> satellite program!\n> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n> \n",
    "attachments": []
}