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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/42P523HG5LVGTSTHDND5HK6LUXDCOVIS/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "42P523HG5LVGTSTHDND5HK6LUXDCOVIS",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/IOQFJ4BG6Y543E2US4BOCZCEM5BMOXP4/",
    "sender": {
        "address": "JamesDuffey (a) comcast.net",
        "mailman_id": "16d2718d7d4a47dca8f564d867aacfe2",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/16d2718d7d4a47dca8f564d867aacfe2/emails/"
    },
    "sender_name": "James Duffey",
    "subject": "[amsat-bb] Re: Question re WA5VJB \"Cheap Yagiis\"",
    "date": "2008-11-15T00:52:45Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/7SXMHMHWUYB3JFRN5N5EKSIPKD6GWPTZ/",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/42AJZSR4RORL67B23XPJEQSHX3XTZ7G5/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Curt - I have built lots of there. I use the 1/2 inch as the inside  \ndimension.\n\nIt is best to measure the spacing as cumulative from the rear, not  \nincremental. That eliminates cumulative errors. ANd you don't have to  \nsubtract. Use a tape measure, or you can buy a 5 or 6 ft steel rule  \npretty cheaply at Lowes or HOme Depot.\n\nHere is the referencce I use for LEO antennas:\n\n< http://www.wa5vjb.com/references/Cheap%20Antennas-LEOs.pdf >\n\nHere is what I get for the spacings when I subtract: 5.75, 6.25, 6.5,  \n6.5, 7.25. I think that this is reasonable.\n\nBut don't subtract measure it all from a single reference point, the  \nreflector. The antennas work great. - Duffey\nOn Nov 14, 2008, at 11:47 AM, Curt Nixon wrote:\n\n> Good afternoon:\n>\n> Hi have liked the way the WA5VJB Kent Britain 144Mhz cheap yagi worked\n> so decided to build one for 435.\n>\n> Couple of questions:\n>\n> For the driven element \"hairpin\" or J, it shows 1/2\" dimension for the\n> spacing--knowing this might be critical on 435, is that INSIDE spacing\n> or OUTSIDE spacing??\n>\n> Also, I noticed what appears to be unusual element spacing for the  \n> last\n> directors in both the 435 and 432 versions.  The spacing increments  \n> seem\n> to follow an increasing spacing trend but then the last couple are\n> different.  ie  spacing goes ...6.25, 6.5, 6.5, 7.25, 7.25, 7.0,  \n> then 7.5.\n>\n> Is this a result of the computer design for easily progressive  \n> build, or\n> perhaps some error in the dimensions posted on-line??\n>\n> Thanks,\n>\n> Curt\n>\n> KU8L\n>\n>\n> _______________________________________________\n> Sent via [email protected]. Opinions expressed are those of the  \n> author.\n> Not an AMSAT-NA member? Join now to support the amateur satellite  \n> program!\n> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n\n--\nKK6MC\nJames Duffey\nCedar Crest NM\n\n\n\n\n\n",
    "attachments": []
}