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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/Z5SVVJIWTIHXCLMAHMT3OUSRELLBJLJH/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "Z5SVVJIWTIHXCLMAHMT3OUSRELLBJLJH",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/Z5SVVJIWTIHXCLMAHMT3OUSRELLBJLJH/?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]  video: stand-alone tracking and tuning with Arduino",
    "date": "2009-12-01T15:02:41Z",
    "parent": null,
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/U3ZQPTKKIUWOFKCHNCN34UE6YV7ETRBL/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Gang:\n\nThe following one-minute video shows my breadboarded Arduino\n(ATMega328) tracking two satellites and tuning an FT-817 in response.\nIt also shows the chip periodically announcing the location of the\nbird in CW, and, as a bonus, you'll see AO-51 being received with a\nsimple dipole directly connected to a low-noise preamp.\n\nhttp://www.youtube.com/watch?v=XgNcCGXeRyw\n\nThis is an application of the Arduino FT-817, Plan 13, CW and Tle\nEEPROM storage libraries available at:\nhttp://code.google.com/p/qrptracker/\n\nOne long-term goal is to port this to the Arduino mini-pro, here\nhttp://www.arduino.cc/en/Main/ArduinoBoardProMini, add a clip-on\nreal-time-clock and battery, and make a 10 satellite tracking dongle\nfor the FT-817 and TH-D7A that is not much bigger than a USB key, and\nsuitable for portable use. (In that version, the location will be\nstored in EEPROM, not derived from the GPS unit.) Long, long term, I\nhope that demoing this technology will inspire ham radio manufacturers\nto make stand-alone doppler tuning a built-in feature in rigs like the\nones above.\n\nRight now, however, the code only tunes the downlink, and I have to\nspelunk through the code for Instanttune to see how to deal with the\nFT-817 on transmit :-)\n\n(For the many people new to this list and this wonderful corner of ham\nradio, I should mention that his project is an experimenter's\nplatform, not a fully-functioning trackbox. For the latter, you want\nthe LVBTracker, available from AMSAT-NA's shop.)\n\n73, Bruce\n-- \nhttp://ve9qrp.blogspot.com\n",
    "attachments": []
}