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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/VOD6JL5D3YRUGOHNDL6IVQHUEJRGJRL2/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "VOD6JL5D3YRUGOHNDL6IVQHUEJRGJRL2",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/FEO63MG2BVTPESCQCTQNR7KJJD3NQWIM/",
    "sender": {
        "address": "vk4tec (a) people.net.au",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Andrew Rich",
    "subject": "[amsat-bb] Re: [SPAM]   Re: 70cm yagi design",
    "date": "2007-12-28T03:30:34Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/6OXDZMHLNOBFUNWMU6ZINUV5DIXHWMFK/",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/KCH5V2SVJXHFLUAWTL5H5IEQGK7GC5Z6/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Thanks guys, construction is under way\n\nI have a question, directors 3 4 5 of the first yagi then displaced by 6.5\ninches come very close to some directors of the second offset yagi 6.5\ninches.\n\nIs it ok to just jump forward a bit to stop the clash ?\n\nThey come withing mm of each other\n\nDid you find this ?\n\n\n----------------------------------------------------------------------------\nAndrew Rich VK4TEC\[email protected] <mailto:[email protected]>\nhttp://www.tech-software.net\n\n\n\n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]]On\nBehalf Of Michael Tondee\nSent: Friday, 28 December 2007 11:08 AM\nCc: Amsat-Bb@Amsat. Org\nSubject: [SPAM] [amsat-bb] Re: 70cm yagi design\nImportance: Low\n\n\nI second this. These antennas are easy to construct and there is no\nmatching section to fiddle with. You can also construct a pair offset on\none boom for RHCP or LHCP, even switchable just like any other satellite\nyagi but then you have to start dealing with phasing harnesses. I don't\nhave an SWR analyzer for that task so I've just got 11 elements and 4\nelements vertically polarized on 70cm and 2 meters respectively. They\nworked quite well when I had a rig! I'm trying now to find one I can\nafford so I can get back in the game. I miss it!\n73,\nMichael, W4HIJ\nJames Duffey wrote:\n> The Cheap Yagis by WA5VJB work great and are easy to make:\n>\n> < http://wa5vjb.com/yagi-pdf/cheapyagi.pdf >\n>\n> < http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf >\n>\n> Precise measurements of element length at 432 are important. You\n> should strive for measurements of at least +/-1/16\"  with +/- 1/32\"\n> better. For the metric inclined you should strive for +/- a mm. These\n> tolerances are possible with a good metal rule, but a bit more\n> difficult with a wooden rule or tape measure. Cut the element a bit\n> long and then file or grind to the proper length checking often.\n>\n> I have made the 3, 4, and 6 element 2M versions and the 11 element\n> 432 version. They all work well with sharp patterns. They have close\n> to 50 Ohm impedance without adjustment. Let me know if you have any\n> more questions, and more importantly, let us know how it all turns\n> out. - Dr. Megacycle KK6MC/5\n>\n> --\n> James Duffey KK6MC/5\n> Cedar Crest NM 87008\n> DM65\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>\n\n_______________________________________________\nSent via [email protected]. Opinions expressed are those of the author.\nNot an AMSAT-NA member? Join now to support the amateur satellite program!\nSubscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n\n",
    "attachments": []
}