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{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/BYZPQTUJ7OQRYYQQOIBBEVPQBFYWWVZA/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "[email protected]", "message_id_hash": "BYZPQTUJ7OQRYYQQOIBBEVPQBFYWWVZA", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/XAXPLKAJ6B6P6GW254RAYOBQOB2SQZGB/", "sender": { "address": "dave (a) druidnetworks.com", "mailman_id": "3b01b396750a47f287ea0c65babd40ea", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/3b01b396750a47f287ea0c65babd40ea/emails/" }, "sender_name": "Dave Swanson", "subject": "Re: [amsat-bb] New AO7 Distance Record", "date": "2016-02-17T19:24:42Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/UUHXRUTZE4B3GZMHSXWM3V4LVCPGK4PZ/", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Steve,\n\nI'm using my \"Alaskan\" Arrow ( 4 elements on 2m, 10 elements on 70cm) \nheld by hand running 10' pieces of LMR-240 into an Icom 821h, manually \ntuned.\n\nEverything is run from a LiFePo4 battery, and I pretty much exclusively \noperate portable mountain-top with unobstructed horizon views in the \ndirection I'm planning to work.\n\n73!\n\nDave, KG5CCI\n\n\n\nOn 2/17/2016 7:59 AM, Eduardo PY2RN wrote:\n> Steve, at this side\n> RX: Funcube pro plus + SDR# V.1430 (with great NB capabilities) + Yagi-Uda 11el CP + Mirage KP-2 pre-amp.\n> TX: TS-2000x + Yagi-Uda 20el CPTracked by Satellite Tracking embedded into SDR-RADIO V2 software suite + GS-232/G-5400\n> Coax: RFS RGC213 15mts longAnd a clear view to my N / NW bound which allows to hear a little after sat LOS most of times.\n> Put together again an old P3 sat setup sitting in storage for many years, just added the SDR fun to it.\n>\n> Tks & 73\n> Eduardo PY2RN\n>\n>\n> From: Stephen E. Belter <[email protected]>\n> To: Eduardo PY2RN <[email protected]>; Dave Swanson <[email protected]>; \"[email protected]\" <[email protected]>\n> Sent: Wednesday, February 17, 2016 12:44 AM\n> Subject: Re: [amsat-bb] New AO7 Distance Record\n> \n> Gentlemen:\n>\n> Congratulations!\n>\n> Would you describe your stations? Radios, antennas, coax, preamps,\n> software?\n>\n> Thanks!\n>\n> 73, Steve N9IP\n> --\n> Steve Belter, [email protected]\n>\n>\n>\n> On 2/16/16, 8:46 PM, \"AMSAT-BB on behalf of Eduardo PY2RN\"\n> <[email protected] on behalf of [email protected]> wrote:\n>\n>> Thanks Dave for the QSO and well done with all the persistence.\n>>\n>> It is always good to double check even when everything is saying that it\n>> wouldn't be possible, even the computer shouting \"satellite is not\n>> visible!\" over your signal :o)\n>> 73s\n>> Eduardo PY2RN\n>>\n>> From: Dave Swanson <[email protected]>\n>> To: [email protected]\n>> Sent: Tuesday, February 16, 2016 8:14 PM\n>> Subject: [amsat-bb] New AO7 Distance Record\n>> \n>> Satellite Friends and Colleagues,\n>>\n>> I wanted to share with everyone that on February 10th, at 2009UTC I made\n>> a scheduled contact with Eduardo, PY2RN, using AO-7 Mode B, from\n>> 'Shinnal Mountain' just west of Little Rock, Arkansas. My 10 digit grid\n>> locator for the contact was EM34ST20SC, and Eduardo's station is located\n>> at GG66LW77JQ in Vinhedo/SP, Brazil. Using the\n>> http://no.nonsense.ee/qth/map.html website for reference, this equates\n>> to 8030.895 km which we believe to be a new record for AO-7 Mode B. I've\n>> been extremely busy this past week, but I had a few folks request that I\n>> share a little background behind the contact, so here we go.\n>>\n>> Back on January 24th, I was on an AO-7(B) pass looking for Gustavo,\n>> PT9BM. While not a record distance, Gustavo's QTH is just shy of 7500km\n>> away from me, so I was up on my mountain, specifically in a spot with\n>> great a great southeastern view of the Horizon. As the bird came into\n>> view, while scanning the passband, I heard Eduardo, PY2RN, calling CQ. I\n>> tried to answer him, but his signal disappeared quickly after that, and\n>> I went ahead and had a great QSO with Gustavo, and didn't think anything\n>> else of it until later that night when I decided to look up the station\n>> I had heard. To my astonishment, Eduardo was 8030km away, which was way\n>> beyond the theoretical range AO-7, even with elevation assistance. I\n>> promptly emailed Eduardo and we both agreed to try and make a contact,\n>> even though the math said it shouldn't be possible.\n>>\n>> At this point the random luck that had let me hear Eduardo on the 24th\n>> seemed to elude us. We attempted contacts on the 26th, 28th, and 30th\n>> all to no avail. After recalculating windows, our next shot was on\n>> February 8th. WinListen (from Sat32pc) calculated a 3 second window on\n>> the 8th, followed by 5 seconds on the 10th. The day of the 8th came, and\n>> we prepared for the attempt. Murphy once again seemed to haunt us\n>> though, as we successfully heard the calls and grids of each other, but\n>> strong CW QRM was hitting the bird so hard that the intelligibility was\n>> low and, more importantly, neither of us had a camera running. We\n>> decided to not count the QSO due to these reasons. The good news was\n>> though, we both heard each other (the first time that had happened) and\n>> our frequency coordination was spot on. We knew it could be done, we\n>> just needed a little luck.\n>>\n>> Finally, on February 10th, we got a bit of a break. We had already\n>> determined that 5 seconds was simply not enough time to do a proper \"QSL\n>> thanks for the grid, have a great day\" type of chat, so we both agreed\n>> to simply repeat 'your call / my call / grid / report' rapidly, much in\n>> the same way a digital or contest contact is made. At 2009UTC, both\n>> stations cleanly heard the others call and grid, completing the\n>> contact. It was extremely rapid, and very weak, but clear. Eduardo's\n>> side of the QSO turned out way better than mine did, and he has uploaded\n>> a recording of it to youtube here: https://youtu.be/pTGSlaY7K7A\n>>\n>> After all my work towards low-elevation contacts from mountain-tops, I\n>> think this is approaching the limits of what can be done on AO-7. This\n>> was by far the hardest sked I've ever attempted, and with the contact\n>> window measured in mere seconds, it leaves absolutely no room for error.\n>> Had I not heard Eduardo's call at random on the attempt with Gustavo, I\n>> doubt I would have even pursued this as something that was possible.\n>> That said, wow.. what a rush\n>>\n>> Big thanks to Eduardo, PY2RN, for humoring my obsession with making\n>> ultra long-distance QSOs on the birds, and for sticking with it until we\n>> finally made it work. Good DX my friend. Also thanks to Gustavo (PT9BM)\n>> for persuading me to point my arrow to the South, and Drew (KO4MA) for\n>> acting as a spotter during one of the passes to see just how far apart\n>> we were from each other. Appreciate it guys.\n>>\n>> If anyone has any questions or comments, I'm happy to field them. Until\n>> then, catch you on the birds! 73!\n>>\n>> -Dave, KG5CCI\n>> _______________________________________________\n>> Sent via [email protected]. AMSAT-NA makes this open forum available\n>> to all interested persons worldwide without requiring membership.\n>> Opinions expressed\n>> are solely those of the author, and do not reflect the official views of\n>> AMSAT-NA.\n>> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n>>\n>>\n>> \n>> _______________________________________________\n>> Sent via [email protected]. AMSAT-NA makes this open forum available\n>> to all interested persons worldwide without requiring membership.\n>> Opinions expressed\n>> are solely those of the author, and do not reflect the official views of\n>> AMSAT-NA.\n>> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n>> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n>\n> \n> _______________________________________________\n> Sent via [email protected]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions expressed\n> are solely those of the author, and do not reflect the official views of AMSAT-NA.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb\n>\n\n", "attachments": [] }