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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/GLY3EKXFUKEJS6JHLX65VJ624JGTU6YT/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "CALVMnS9=0+xx4b1cYxEweLy3yXLQYRcKw66Ezyv=sbECr06kHw@mail.gmail.com",
    "message_id_hash": "GLY3EKXFUKEJS6JHLX65VJ624JGTU6YT",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/GLY3EKXFUKEJS6JHLX65VJ624JGTU6YT/?format=api",
    "sender": {
        "address": "jonny290 (a) gmail.com",
        "mailman_id": "bed0432ae6e64c0493fa6343553c3746",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/bed0432ae6e64c0493fa6343553c3746/emails/?format=api"
    },
    "sender_name": "Jonny 290",
    "subject": "[amsat-bb] Inverted-V turnstile idea",
    "date": "2014-02-28T19:50:22Z",
    "parent": null,
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/YNY76ZAMLVXRGADA5LFQEDQWFCLSC5J7/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "I had an idea pop in my head for a simple turnstile antenna, and am not\nfinding much info on what I want to do via Google searches I wanted to\nbounce this off the list and see what people think.\n\nMy idea consists of three main points:\n\n-Antenna elements being conventional (non-folded) inverted V dipoles,\ntuning the length for resonance and angle to set at 50 ohms each\n-1/4 wave 50 ohm phasing line between the sets of dipoles\n-Feed via DK7ZB match using a 1/4 wave paralleled 2x75 ohm line section (37\nohms), transforming the 25 ohms back up to right around 50 ohms for final\nfeed\n\nThis approach would give the following advantages:\n\n-Lower SWR than standard 75-ohm parallel turnstiles\n-Dipoles could be individually tuned via direct 50 ohm feed during\nconstruction\n-DK7ZB match is constructed out of inexpensive 75-ohm coax\n-Phasing line length would only affect phase, instead of phase and\nimpedance.\n\nMy main question, though is: With dipole elements canted down roughly 35\ndegrees from vertical (what I'm ballparking to get them down to 50 ohms),\nam I going to see noticeably degraded performance, especially regarding the\npolarization?\n\nThanks for any tips or discussion!\n\n--Matt\nKC4YLV\n",
    "attachments": []
}