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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/T6IMBEN7FWI4YZO75RSFWSM6QPANMZR7/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "T6IMBEN7FWI4YZO75RSFWSM6QPANMZR7",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/T6IMBEN7FWI4YZO75RSFWSM6QPANMZR7/",
    "sender": {
        "address": "al7eb (a) acsalaska.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Edward R. Cole",
    "subject": "[amsat-bb] Re: AO-07 Downlink Antenna",
    "date": "2007-02-03T19:31:09Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "At 04:31 PM 2/3/2007 +0000, [email protected] wrote:\n>\n>Tyler-Think about a 10 meter full wavelength loop inside 1/2 inch pvc\nlaying on your roof.  I used one for many years on rs10 and 15.  A little\nmore gain and less directive than a dipole.  The length will be 1005/F(mhz)\n>73 Bob W7LRD\n>Seattle\n>\n>-------------- Original message -------------- \n>From: \"Tyler Harpster\" <[email protected]> \n>\n>> I just bought a 10 meter preamp from Advanced Receiver Research. I was \n>> planning on making a 10 meter dipole and feeding the voltage supply for\nthe \n>> mast mounted preamp up the coax. Will this be enough to hear the bird? \n\n\nBob,\n\nI guess the height of the horizontal loop works well for a NIV antenna\n(beaming high angles).  I have thoughts of putting up a 10m J-Pole using a\nten foot tower section as the base and extending with 1-Inch aluminum\ntubing for the required length (3/4 wavelength total).  This will likely\nprovide lower radiation angles (which is desirable for DX).  The J-pole\ndoes not require a ground plane so hoping this will work well.  A J-Pole\nworks well using a flagpole as a stealth antenna - just use the top section\nlength as required at the operating freq.\n\nTyler,\n\nMy experience with ARR preamps is with models not set up for coax line\npowering.  If you are uncertain, you might check on this.  To use coax line\npower with a preamp not providing the required circuitry one must add\nT-bias units on both ends of the coax (unless your radio has the capability\nof powering an external preamp).\n73's,\nEd - KL7UW \n=========================================\nBP40iq,  Nikiski, AK      http://www.qsl.net/al7eb\nAmsat #3212\nModes: V - U - L - S\nUSA Rep. for Dubus Magazine: [email protected]\n=========================================\n\n",
    "attachments": []
}