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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/GXEQNK3P7UUJRV7L6MZLV73H4EBMFETP/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "GXEQNK3P7UUJRV7L6MZLV73H4EBMFETP",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/GXEQNK3P7UUJRV7L6MZLV73H4EBMFETP/",
    "sender": {
        "address": "co7wt (a) frcuba.co.cu",
        "mailman_id": "e0c3935155ca4fb78cafec35cf64d7f2",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/e0c3935155ca4fb78cafec35cf64d7f2/emails/"
    },
    "sender_name": "Pavel Milanes Costa",
    "subject": "[amsat-bb] Moxon on top a Baofeng UV-5R for 70cm experiment",
    "date": "2015-03-17T00:05:41Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi to all.\n\nYesterday I was evaluating the construction of a small antenna for \nportable use on top of the Baofeng UV-5R... at the end I finished with \ntwo choices CJU vs moxon for 70cm handheld\n\nAfter some modeling I choose the moxon over the CJU because:\n- Smaller\n- Less wire\n- Less weight\n- Less stress for the connector\n- Just ~0.6 dB down vs the CJU\n- By far better F/B ratio\n\nAfter completion of the first \"prototype\"...\n\nI successfully heard the CW beacon of Jugnu, CO-57, CO-58, PRISM and others.\n\nThe fire test will be tonight on SO-50, I know now I will copy ok, but \nthe challenge is eliminate the desense of having two yaguis on a cross boom.\n\nI will test the moxon handheld on RX (UHF) and a Jpole for the 2m uplink \nwith 5W of a handheld.\n\nI have not measured the SWR of the moxon, but with the simulation the \nmeasures are not \"that critical\" for getting a less than 1:2 of SWR over \nthe entire 70cm band (1:3 bandwidth is about 16 Mhz)\n\nThe moxon \"experiment\" is just ~25 cm width and ~15 cm height (may be \nsmaller also, the minimal height is ~10cm + connector) over the Baofeng \nUV-5R, there is no much stress on the connector.\n\nI used a SMA to BNC adapter (the kind with a rim to fit tight to the \nradio body) and then a clamp on BNC (male) with a bronze tube as coaxial \nshield/boom of the antenna.\n\nWish me luck with the desense problem...\n\n73\n\n-- \nM.Sc. Pavel Milanes Costa, CO7WT\nSYSOP Nodo Gateway CO9JAZ\nCiudad de Camagüey, Camagüey, Cuba.\nCell: (+53) 53-847819\n\n",
    "attachments": []
}