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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/XHCZ5XS7K3QFK6N7PGF7PCXL657WR4BJ/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "CAJCSnOZ6ZEHmQooWT6GRL8zQ+rTnswEXzGkjgfC4Pbc-GacTKQ@mail.gmail.com",
    "message_id_hash": "XHCZ5XS7K3QFK6N7PGF7PCXL657WR4BJ",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/6BIYZYLXMF45EQ6KPHOVD5LPGSMJONLN/?format=api",
    "sender": {
        "address": "scott23192 (a) gmail.com",
        "mailman_id": "120e10e05ba14969a11da0a96d21e355",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/120e10e05ba14969a11da0a96d21e355/emails/?format=api"
    },
    "sender_name": "Scott",
    "subject": "Re: [amsat-bb] PSAT2 downlink for DTMF grids and messages",
    "date": "2019-08-13T07:38:55Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/PZA32SCLXHPTP4RV4JZPIVATCMFEZIKE/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WWSR3SE776EZCLAD3JFJ5HM37EZPRUEZ/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Well, at the last minute before tonight's PSAT-2 passes, I finally figured\nout the correct format for the DTMF QSL messages & answered my own question.\n\nHere's a tweet w/ screen shots & audio URLs from tonight's successful DTMF\nconnections:\n\nhttps://twitter.com/scott23192/status/1161174309328621573\n\nI found the following page particularly helpful:\n\nhttp://aprs.org/QIKcom/Q2-DTMF-messages.txt\n\n... in particular, the instruction:\n\n---------------------------------------------\n\nDTMF messages are sent in a 16 key string starting with the \"C\", ending in #\n\n  //\n\n    CMMxxCCCCCCkkkk#  Where CCCCCCkkkk are your callsign keys and key code\n                      and MM is the message number below\n\n---------------------------------------------\n\n.. so, here is how it breaks down if anyone else could use the extra\nhelp that I did.\n\nGet your call/grid DTMF from http://aprs.org/PSAT2Translator.html\n\n(important note:  if your callsign is less than 6 characters, put a\nspace or 2 at the end to bring your character count to -6- before\nclicking \"Translate\")\n\n... so for a CQ, I use that string exactly:\n\n*18175453702201#\n\nHowever, if I want to QSL someone else's CQ, I only use the call sign\nportion of that DTMF string.  The string that gave me the QSL success\nwas:\n\nC40455453702201#\n\n... let's break that in its parts:\n\n>C :  message follows\n>40 :  message #40 is a QSL\n>45 :   I am QSL-ing CQ #45   (from KC9ELU as seen on http://www.aprsat.com/dtmf ) [... or heard directly over-the-air!! ]\n>545370 :  the call sign portion of my original DTMF translation\n>2201 : also from the original DTMF translation - simply put, a converted 'key code' that goes with the previous numbers representing my call sign\n># :   END of message\n\nI won't go into the creation of the DTMF audio file here (I use\nAudacity); please feel free to contact me if you need help on that.  I\nused audio files transmitted via Signalink at my location, but of\ncourse if you have a radio with DTMF memory capability, that's an\noption, too.\n\nHope that is helpful to someone else since I was so slow on the\npick-up on how to format the QSL type of message.\n\n-Scott,  K4KDR\n\n======================\n\n\nOn Mon, Aug 12, 2019 at 11:46 PM Scott <[email protected]> wrote:\n\n> Many thanks to Robert for the time he's put into creating these very\n> informative web pages!\n>\n> Bob, I have read and re-read the DTMF instructions but even though it\n> reflects poorly on me, I'm not sure what exact string to transmit to QSL\n> someone's previous CQ.\n>\n> So here is my best guess - please correct as required.\n>\n> My callsign/grid DTMF (that has worked once) is:  *18175453702201#\n>\n> For me to QSL CQ #45 from KC9ELU, do I transmit the following?:\n>\n> C4045*18175453702201#\n>\n>\n> Thanks in advance!\n>\n> -Scott,  K4KDR\n>\n> ==========================\n>\n> On Mon, Aug 12, 2019 at 9:55 PM Robert Bruninga via AMSAT-BB <\n> [email protected]> wrote:\n>\n>> Thanks to Robert, KE6BLR, we can now capture the DTMF Grids and Messages\n>> data coming down from PSAT2.  I have added the DTMF page to the list of\n>> links for PSAT2:\n>>\n>> http://aprs.org/sats.html\n>>\n>> Summary:  You encode your Grid and callsign into a 16 digit DTMF memory on\n>> your radio.  Using narrow band FM, send it on 145.98 withi doppler\n>> compensation or at the middle of a pass.\n>>\n>> PSAT2 assigns a CQ number and acknowledges it by voice and then sends an\n>> APRS packet that contains the grid.  Robert's web page will capture that\n>> packet.\n>>\n>> A second station can send their DTMF grid and get the same process but\n>> with\n>> a new CQ number.\n>>\n>> Now, either station can send a DTMF QSL Message for the other guy's CQ\n>> number which will also be spoken and recorded on the APRS downlink.\n>>\n>> Details on the psat2 page on the above web page.\n>> PSAT2 is entering a phase of Apogee in the northern hemisphere for a week\n>> or so and so is more workable in the USA and southern Europe.\n>>\n>> Bob, WB4APR\n>>\n>\n",
    "attachments": []
}