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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/O4GEDYWQ3PQD632TUF4DV72VECJRLG7G/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "O4GEDYWQ3PQD632TUF4DV72VECJRLG7G",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/QOJPK4IJ7WRYOJK5DPYC3ABZOT4HMUWI/?format=api",
    "sender": {
        "address": "zl2cia (a) paradise.net.nz",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Sil - ZL2CIA",
    "subject": "[amsat-bb] Re: ALuminum Rod",
    "date": "2007-03-22T03:55:01Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/CHWPAMANRW7O7UX4FUJGMAQSEXHTFY6Q/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "GEORGE ABBOTT wrote:\n> Hi: Can brass rods be used for antenna elements? Regards ,George Abbott\n> Ka1ajf\n\nGeorge,\n\nYes and no. I have made antennas from brass rod and they worked just \nfine, but would probably have worked a little better if they had been \nmade from aluminium (aluminum).\n\nBrass rod is a nice material to work with. It's rigid and can be easily \nsoldered. However, the resistivity of brass is higher than aluminium and \nthe I squared R losses are higher. A little more of your Tx energy is \nwasted warming your antenna if it is made from brass than would be if it \nwas made from aluminium. Most antenna manuals recommend against brass \nbecause of  this, although I'm not sure how \"real\" this loss is.\n\nIntriguingly, one our our club members built himself a Q meter, and \ndemonstrated it at a club meeting by measuring the Q of loops of wire \nfrom different materials. While brass did less well than than aluminium \nor copper, galvanised iron wire was significantly better than brass. \nThis was surprising because zinc is generally considered to have a \nresistivity only slightly less than brass. I built some antennas using \nheavy galvanised fencing wire, based on the results of this test. They \nwere not a fantastic success.\n\nIf you already have the brass rod, then go ahead and experiment.\n\nRadio data Reference Book: G. R. Jessop\nRelative resistance\nCopper 1\nAluminium 1.64\nZinc 3.4\nBrass 3.9\n\nARRL Handbook 1992\nResistivity compared to copper (same as relative resistance)\nCopper 1\nAluminum 1.6\nZinc 3.4\nBrass 3.7 to 4.9\n\nSil\nZL2CIA\n\n\n\n\n",
    "attachments": []
}