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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/F7SHXILIBCFEFVNXVVVIL4R2FBBW7WG6/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "F7SHXILIBCFEFVNXVVVIL4R2FBBW7WG6",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/LPNUTKGHWXJYIY2CUB4TFTL4LLTNEH5R/?format=api",
    "sender": {
        "address": "ve9qrp (a) gmail.com",
        "mailman_id": "4d6061838db34aba9a1c4722addebfaf",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/4d6061838db34aba9a1c4722addebfaf/emails/?format=api"
    },
    "sender_name": "Bruce Robertson",
    "subject": "[amsat-bb] Re: Easy to make, low cost omni-directional antennae",
    "date": "2008-03-28T11:33:37Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/LPNUTKGHWXJYIY2CUB4TFTL4LLTNEH5R/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "On Thu, Mar 27, 2008 at 4:17 PM, Bill Dzurilla <[email protected]> wrote:\n\n>  If you do go omni, get it high enough to be in the\n>  clear.  And unless you get a preamp, use very good\n>  coax and keep the line as short as possible.  You can\n>  get a 70cm receive-only preamp from Ramsey Electronics\n>  for $17, but with that you'll need a separate coax\n>  line for the 2m uplink, or a duplexer.\n\nYou can get such a preamp from Ramsey, but as one who has built their\npreamps in hopes that they will suffice for satellite operations, I do\nnot recommend it. Remember that the improvement that a preamp makes\n(for a given position in the receiving system) is related to the gain\nand inversely to the noise figure. Gain is easy, low noise figure is\nnot; but without the latter you will receive more noise on 70cm, not\nmore signal. I would strongly recommend a ARR or SSBUSA preamp for any\nbeginner. Since the marginal expense is not that great, you are much\nbetter off getting a switching model appropriate for out-of-doors use.\nGet switching also because you will want to diversify into mode-B\noperations, using VO-52 in particular.\n\nI have enjoyed many Ramsey kits in the past, but my experience is that\ntheir preamps are not designed for improving weak-signal reception on\neither the VHF or UHF satellite bands.\n\n73, Bruce\nVE9QRP\n",
    "attachments": []
}