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    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/HWROINQLM2PLJZ24IZQ5X7U7CLCQL6HE/?format=api",
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    "message_id": "CH2PR13MB3864D10970B51DCD54C168438A219@CH2PR13MB3864.namprd13.prod.outlook.com",
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    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/HWROINQLM2PLJZ24IZQ5X7U7CLCQL6HE/?format=api",
    "sender": {
        "address": "gary_mayfield (a) hotmail.com",
        "mailman_id": "fe442cdc520e4857a9168b9182091295",
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    "sender_name": "Gary",
    "subject": "[AMSAT-BB] Re: Arrow Stacking? Technical Advice needed.",
    "date": "2021-05-29T20:33:19Z",
    "parent": null,
    "children": [],
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    "content": "I have done it, and It worked pretty well. My harness was an exact copy of the one in Chapter 7 of the 2nd edition of the \"Satellite Experimenter's Handbook\" by Martin Davidoff, K2UBC.\n\nI have attached a picture which I am not sure will be passed by the reflector, but should make it to you.\n\nThe one shown has 2.4 GHz helix between the Yagis.  Even though I used a non-conductive crossboom, and attached the antennas to it using plastic ty-wraps, I also avoided the crossboom 'hot spots' described by Kent Britain, WA5VJB here:\nhttp://www.kk0sd.net/metalboom/metalboom.htm\n\nI have no idea how circular the patterns really were, but the system consistently outperformed a single Arrow antenna.\n\nThe harness was set up for RHCP and used RG-6 and LMR-240 UF coax.\n\nI did not use the diplexers, and I did not attempt any switching arrangements.\n\nI replaced that setup with the Gulf-Alpha dual band satellite Yagi. That thing was a dream, and one of the dumbest things I have done (and I have done a lot of them) was part with that Gulf-Alpha. If someone wants to sell a Gulf-Alpha please let me know!!!\n\n73 and Good Luck,\nJoe kk0sd\n\nFrom: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>>\nSent: Saturday, May 29, 2021 3:00 PM\nTo: 'AMSAT BB' <[email protected]<mailto:[email protected]>>\nSubject: [AMSAT-BB] Arrow Stacking? Technical Advice needed.\n\nAll,\n\nI happen to have a pair of the Arrow II handheld SAT antennas available. I wish to use them as a pair set up in crossed polarization. To those who have messed around with various light antenna combinations and have used a pair of Arrows, please let me know your experiences what worked and what did not. Since each antenna has a single 2m and 70cm yagi on it, connecting the 2 element sets will be a little more challenging than one would find for a single band crossed polarized yagi.\n\nObviously one will be set with the 2m elements vert, the other horizontal. So:\nHow have you  connected them?\nWhat transmission line harness lengths did you use?\nWas RH or LH polarization a consideration?\nWas you experiment a satisfactory arrangement?\n\nI am going to take the stock 10W diplexers out of line and use something a little more robust to prevent desense and handle more than 10W.\n\nI am really not interested in hearing about other antennas... I don't need to be persuaded or dissuaded to do anything else. I have currently have limited resources to put into this, so jumping off the deep end and buying an M2 Leo kit (or even a \"crushcraft\" pair) is not in the cards.\n\nThanks in advance for sharing your experience.\n\nJack Spitznagel - KD4IZ\nAssistant Editor - AMSAT News Service\nCell: (410) 207-5123\[email protected]<mailto:[email protected]>\n\n\n\n\n\n\n",
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