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    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/A3AUWHOQG4HEQW5L47ZKBJAJ3ZR6M25W/",
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    "message_id": "[email protected]",
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    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/A3AUWHOQG4HEQW5L47ZKBJAJ3ZR6M25W/",
    "sender": {
        "address": "wa4cwi (a) bellsouth.net",
        "mailman_id": "4aa6f1e3f4cd4bf4b1492e47285ca527",
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    "sender_name": "Jim McCullers",
    "subject": "[pacsat-dev] Satellite use of the AX5043",
    "date": "2023-01-04T19:55:28Z",
    "parent": null,
    "children": [],
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    "content": "Over the holiday break I did some Google searches on the use of the AX5043\nin satellite service and found the following references.\n\n \n\nThese two publications cover the OreSat developed at Portland State\nUniversity.  The Ax5043 is employed as UHF transceiver as well as IF for an\nL-Band receiver.\n\nAs of yet, I have not received a signal from OreSat0 but as it is a\ntelemetry only satellite the transmitter is possibly only activated for\npasses over the Oregon area.\n\nI've reached out to them via email but have yet to receive a response.\n\n \n\nhttps://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=5110&context=smal\nlsat\n\n \n\nhttps://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=6639\n<https://pdxscholar.library.pdx.edu/cgi/viewcontent.cgi?article=6639&context\n=open_access_etds> &context=open_access_etds\n\n \n\n \n\nThis paper deals with detection of UHF uplink interference using the AX5042\nsimilar to the AX5043 and makes an interesting case not to use 70cm uplinks\ndue to interference caused by the shared services in the 70cm band.\n\nThey used a single antenna and LNA into a 4-way splitter similar to what is\nplanned for Pacsat.\n\n \n\nhttps://www.sciencedirect.com/science/article/pii/S0273117721007778\n\n \n\n \n\nThe final paper is an interesting study of the AX5043 capabilities.  They\nexamined the radiation resistance of the AX5043 and found it held up well.\n\nAlso is an interesting discussion of LNA requirements as well as radiation\nresistance of various transistor types. \n\nIt should be noted the original project was canceled and a follow on is due\nto launch in 2023.  How it might vary in configuration is not published. \n\n \n\nhttps://core.ac.uk/download/pdf/295596877.pdf\n\n \n\nJim McCullers\n\nWA4CWI\n\n\n\n",
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