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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/6OXDZMHLNOBFUNWMU6ZINUV5DIXHWMFK/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "6OXDZMHLNOBFUNWMU6ZINUV5DIXHWMFK",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/FEO63MG2BVTPESCQCTQNR7KJJD3NQWIM/",
    "sender": {
        "address": "mat_62 (a) netcommander.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Michael Tondee",
    "subject": "[amsat-bb] Re: 70cm yagi design",
    "date": "2007-12-28T01:07:36Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/RLAP4N42TDQNRJTF4OGUK7ZCYKWUYL3E/",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/VOD6JL5D3YRUGOHNDL6IVQHUEJRGJRL2/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "I 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",
    "attachments": []
}