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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/44OSNNSFKT5S6MFEHZ6FGN4LIJ7KHK53/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "44OSNNSFKT5S6MFEHZ6FGN4LIJ7KHK53",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/44OSNNSFKT5S6MFEHZ6FGN4LIJ7KHK53/?format=api",
    "sender": {
        "address": "saguaroastro (a) cox.net",
        "mailman_id": "a4a1e7d14c254c03bd1ba487c7a01f6d",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/a4a1e7d14c254c03bd1ba487c7a01f6d/emails/?format=api"
    },
    "sender_name": "Richard Tejera",
    "subject": "Re: [amsat-bb] Linear vs Circular Polarization",
    "date": "2017-04-12T22:51:36Z",
    "parent": null,
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/U7FQQLWTIE6JAZMWHM3WAADFGXSAMDOD/?format=api"
    ],
    "votes": {
        "likes": 0,
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        "status": "neutral"
    },
    "content": "Brady,\n\nDomenici, I8cvs SK had published a pair of articles on making a switching relay between vertical, Horizontal, LHCP & RHCP. he sent me PDF's, which are in my to do someday folder. \n\nContact me off list (email is good on QRZ), and I will send them to you. They are for 70cm, but certainly can be adapted for 2m easily enough.\n\nRick Tejera K7TEJ\nSaguaro Astronomy Club\nwww.SaguaroAstro.org\nThunderbird Amateur Radio Club\nwww.w7tbc.org\n\nOn April 12, 2017, at 14:11, Brady Gordon <[email protected]> wrote:\n\nHi Everyone,\r\n\r\nI'm working on building a pair of crossed yagis for 2m and 70cm, and I have\r\nsome questions.  I apologize if this has been discussed before, but I\r\ncouldn't find answers online so I was hoping you all could help me out.\r\n\r\nFirst, it seems easiest to me to build an antenna system that can either\r\nswitch between vertical and horizontal linear polarizations, or between\r\nright hand and left hand circular polarization.  Which would be more\r\nuseful?  And is it worth the extra effort to build an antenna system that\r\ncan switch between all four polarizations?\r\n\r\nAlso, I've been looking at the different ways of achieving circular\r\npolarization.  I like the idea of using mechanical 1/4 wave separation\r\nbetween the two yagis so I don't have to cut phasing lines.  Would it be\r\npossible to switch polarizations by putting a relay at the feedpoint of one\r\nof the yagis and switching which side of the driven element the center\r\nconductor and shield of the coax goes to?  I've never seen this done\r\nbefore, but it seems to me it would work.  Any thoughts?\r\n\r\nThanks and 73,\r\nBrady AC0XR\r\n_______________________________________________\r\nSent via [email protected]. AMSAT-NA makes this open forum available\r\nto all interested persons worldwide without requiring membership. Opinions expressed\r\nare solely those of the author, and do not reflect the official views of AMSAT-NA.\r\nNot an AMSAT-NA member? Join now to support the amateur satellite program!\r\nSubscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\r\n",
    "attachments": []
}