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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/U44HFGUZAEJS4GZKPK6P33QTW3JEK42P/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "U44HFGUZAEJS4GZKPK6P33QTW3JEK42P",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/HWEYW45UKFWM3PDQXLFSZHMVUJ7QSPUF/?format=api",
    "sender": {
        "address": "dave (a) w0dhb.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Dave WØDHB",
    "subject": "[amsat-bb] Re: Helical Antenna on 70 cm",
    "date": "2013-05-14T15:31:07Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/HWEYW45UKFWM3PDQXLFSZHMVUJ7QSPUF/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "A good source of antennas and antenna advice is Dave W6OAL\n\nhttp://www.hamtv.com/oal.html\n\nHe likes Loop yagis for 23cm \n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On\nBehalf Of Rolf Krogstad\nSent: Monday, May 13, 2013 10:23 AM\nTo: [email protected]\nSubject: [amsat-bb] Helical Antenna on 70 cm\n\nI am new to satellites and new to the design requirements for UHF and am\nlooking for advice.\n\nI am looking to build a Helical antenna for the 70cm Band.  I am considering\nthe plans for such an antenna from the 2010 edition of the ARRL Satellite\nHandbook.  The plans call for a 235 cm (7' 8\") long, 2.5 cm (1\") diameter\ncenter support made of either a wooden dowel which has been treated or a\nfiberglass tube.  It also requires multiple 7.6 cm (3\") spacers for the\nhelical element.\n\nMy question is would fiberglass rods made of \"Isophthlic Polyester Resin\"\nbe a good choice of material at UHF frequencies?\nI hesitate to use treated wood because I plan to mount this on the top of a\n15 meter high tower and it isn't very accessible.\n\nThanks\n\nRolf   NR0T\n[EN34]\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": []
}