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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/LRNITWXZH2NN2NOSMDZ72KRBGEWHW5TL/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "1345285654.1410200.1285137172618.JavaMail.root@sz0126a.emeryville.ca.mail.comcast.net",
    "message_id_hash": "LRNITWXZH2NN2NOSMDZ72KRBGEWHW5TL",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/LRNITWXZH2NN2NOSMDZ72KRBGEWHW5TL/?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": "Bob- W7LRD",
    "subject": "[amsat-bb] Re: Antenna Opinions?",
    "date": "2010-09-22T06:32:52Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "\n\nHi Greg et al \n\nI have been partial with the helix for satellites.  I run 10W to a 16 turn helix through 40 feet of LMR-400.  I rarely have an issue getting into AO-51.  I believe AO -51 is our only L band bird, I try to \"exercise\" my gear when the opportunity is there.  I experience very little fading with the L band uplink, input to the satellite is quite solid down to fairly low elevations.  The yagi would as you mentioned would better for  terrestial 1.2ghz stuff. \n\n73 Bob W7LRD \n----- Original Message ----- \nFrom: \"Greg D.\" <[email protected]> \nTo: [email protected] \nSent: Tuesday, September 21, 2010 10:03:31 PM \nSubject: [amsat-bb]  Antenna Opinions? \n\n\nHi folks, \n\nSo, we had a swap meet a couple of weekends ago, and I found a bargain I couldn't refuse.  Of course, now I need to decide what to do with it...   \n\nThe Find was a 35 element 1296mHz antenna, well built and in excellent condition.  Linearly polarized, horizontal; supposed to be 23dBi gain.  Manufacturer, of course, is unknown.  No markings, but it does not look home-built.  By the mounting hardware, it looks like it was part of some sort of stacked array. \n\nThe problem is that I already have a 1296mHz antenna.  Home-made, circularly polarized, 18 turns Helix.  Should be something like 17dBic, if the calculations are correct. \n\nIn the shack, which is at the wrong end of 60' of 1/2\" hardline and a total of about 15' of RG-213 or something like it, I have my Yaesu 736R and its 10 watts of screaming RF power.  No preamps. \n\nWhich antenna should I keep up on the rotor assembly? \n\nLast weekend I put up the new antenna.  I've made one AO-51 LU pass with the new antenna, and I was not impressed.  Several times I couldn't get into the bird, presumably because of the crossed polarization.  But when I did get in, it was full quieting, even at low elevations.  I don't recall having this much trouble with the Helix.  I think AO-51 is the only current satellite on L-band, right? \n\nFor other uses, there's nothing terrestrial to aim at, repeaters-wise; they're all hiding behind one or more hills, or went off the air years ago.  That leaves Weak Signal work (hence the horizontal mounting).  I do have one shot into the valley, to the North West, but probably slim pickings for contacts.  I haven't tried EME. \n\nI'm leaning towards putting the Helix back up, and passing the new one on to someone more able to use it.  What are your thoughts? \n\nThanks, \n\nGreg  KO6TH \n\n                                                \n_______________________________________________ \nSent via [email protected]. Opinions expressed are those of the author. \nNot an AMSAT-NA member? Join now to support the amateur satellite program! \nSubscription settings: http://amsat.org/mailman/listinfo/amsat-bb \n",
    "attachments": []
}