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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/UBZIHDGGPMYQ6QX7C7LXIQIJPDLS6VT5/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "101720061214.16033.4534C92E0001502700003EA122007503300B9D04C999@comcast.net",
    "message_id_hash": "UBZIHDGGPMYQ6QX7C7LXIQIJPDLS6VT5",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/UBZIHDGGPMYQ6QX7C7LXIQIJPDLS6VT5/?format=api",
    "sender": {
        "address": "w7lrd (a) comcast.net",
        "mailman_id": "717aa2a241704c7497e9abd8c983f6b7",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/717aa2a241704c7497e9abd8c983f6b7/emails/?format=api"
    },
    "sender_name": "[email protected]",
    "subject": "[amsat-bb] Re: 10' Dish available",
    "date": "2006-10-17T12:14:38Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Bob\nPerhaps my helix feeds would be applicable.  Usually designed for off center dishes.  With fewer turns you would have a wider pattern. \nhttp://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&sspagename=STRK%3AMESE%3AIT&viewitem=&item=9725315663&rd=1&rd=1\n73 Bob W7LRD\nSeattle\n-------------- Original message -------------- \nFrom: \"Robert Bruninga\" <[email protected]> \n\n> > How does one build a feed to properly illuminate a pizza \n> slice-shaped \n> > reflector? Or is this a matter of 1/4 of a 10' dish being \n> still so \n> > over-kill that you only use the fat end, and under-illuminate \n> that? \n> \n> Well, presumably one will be using this on S-Band either for \n> 802.11 or other 2400 MHz purpose so one has to build his own \n> feed anyway. Probably a dipole over a splashplate. That is \n> typically a good feed for a typical .4 F/D dish? If that is so, \n> then when it is used to illuminate just 1/4th of the dish area, \n> then there is spillover and a few dB are lost. Maybe a good \n> feed for the 1/4 quadrant dish might be a dipole over a \n> splashplate with a director? \n> \n> Someone who is good on feeds might suggest the right answer \n> here... But in any case, one is not trying to illuminate the \n> tastey end tip of the pizza slice, but generally the center of \n> the crusty end... \n> \n> De WB4APR, Bob \n> \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",
    "attachments": []
}