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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/26LNZ5H2E655LF4UWDLCNFRX5X7UDIY7/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "CDA898A0.37437%[email protected]",
    "message_id_hash": "26LNZ5H2E655LF4UWDLCNFRX5X7UDIY7",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/PRLL2W734MEZD6FXCQFDMWPCPPGTN5RK/",
    "sender": {
        "address": "seb (a) wintek.com",
        "mailman_id": "334792c18f7f4268a405ca1814e93bd0",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/334792c18f7f4268a405ca1814e93bd0/emails/"
    },
    "sender_name": "Stephen  E. Belter",
    "subject": "[amsat-bb] Re: satellite metallic cross boom",
    "date": "2013-05-03T02:33:50Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/PRLL2W734MEZD6FXCQFDMWPCPPGTN5RK/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Norm,\n\nI'm assuming you're talking about circularly polarized antennas.\n\nThe short answer is yes, you can use a metallic cross boom if you:\n(1) mount both antennas in an X orientation to the boom, *and*\n(2) avoid having the cross boom 0.5-wavelength, 1.0-wavelength, etc. away\nfrom the driven element.\n\nThe full article written by Kent Britain (of cheap-yagi fame) is on Howard\nLong's (of LVB Tracker and FUNcube dongle fame) web site:\n\nhttp://www.g6lvb.com/fibermetalboom.htm\n\nGood luck with your project; have a great trip!\n\n73, Steve N9IP\n--\nSteve Belter, [email protected]\n\n\nOn 5/2/13 9:18 PM, \"Lizeth Norman\" <[email protected]> wrote:\n\n\n>Hi all,\n>Am down in Peru working on the club station. The antennas are mounted on a\n>metallic cross boom. The antennas are carbon copies of each other in terms\n>of position. I read on the internet that one should be rotated 45 degrees.\n>\n>Is this an old wives tale? I can fix the problem as one of the antennas\n>will partially down to rehab it.\n>\n>Thanks,\n>Norm n3ykf\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",
    "attachments": []
}