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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/VCFAQDNNZR4CJHN4PXOVQNFLEHMPSQ7R/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "000c01cf6532$e5d86cd0$b1894670$@net",
    "message_id_hash": "VCFAQDNNZR4CJHN4PXOVQNFLEHMPSQ7R",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/VCFAQDNNZR4CJHN4PXOVQNFLEHMPSQ7R/",
    "sender": {
        "address": "wa8sme (a) comcast.net",
        "mailman_id": "2294808766fc43a689ffbf2c510605a8",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/2294808766fc43a689ffbf2c510605a8/emails/"
    },
    "sender_name": "Mark Spencer",
    "subject": "[amsat-bb] Re: Antenna Question",
    "date": "2014-05-01T11:45:49Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Doug,\n\n \n\nI doubt that I have greater understanding of antennas than you do, but I'll\ngive your question a shot.  Actually, I have been working on circularly\npolarizing the ARROWS with the WRAPS lately, a work still in progress but\nalmost complete.  So I am throwing out the draft information I have been\nworking on to date.\n\n \n\nYou can circularly polarize a pair of ARROWs and they actually work well\ntogether from my experience (one of the reasons I suspect is that the feed\nsystem of the individual antennas is very well matched).  If you are\nmounting the two antennas virtually on the same boom (sticking them right\nnext to each other) it might get pretty crowded and interactions\ncomplicated.  I have mounted two ARROWs separated horizontally about 3 feet\napart with pretty good success.  I have done this with stock ARROWs, and\nalso with one side with the two meter elements, and the other side with the\n70 CM elements (had to drill extra holes for the 70 CM mod), both ways\nworked about the same.  The tricky part is coming up with the right feed\nlines (the transformer lines and the phasing line).\n\n \n\nI have a first draft of an article I am working on that describes my latest\neffort to come up with a polarity switching arrangement for ARROWs with the\nWRAPS, it can be downloaded here (if you have download issues, let me know\nand I'll try and get it to you another way). \n\n \n\nClick here to view Circling the WRAPS\n<https://www.dropbox.com/l/xvKKUtfwUN5gFhGyCiXjua?> \n\n \n\nI will be adding to the conclusion of the piece some suggestions on where to\ninclude an external diplexer in the line to handle the single feed line\nissue that you mention in your post.\n\n \n\nAnyway, I hope this will stimulate some ideas.\n\n \n\nMark\n\n \n\nMark Spencer, WA8SME\n\n860-381-5335\n\[email protected]\n\n \n\n",
    "attachments": []
}