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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/YKIFG3OIJLLBTVOVC63CGTH3RCGRJMEK/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "YKIFG3OIJLLBTVOVC63CGTH3RCGRJMEK",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/J5SC6XKL5CYVQINMOHKGSOGTQETN56WV/",
    "sender": {
        "address": "ke5gdb (a) gmail.com",
        "mailman_id": "bede4222a4a345e8971f03953d4f34b0",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/bede4222a4a345e8971f03953d4f34b0/emails/"
    },
    "sender_name": "Andrew Koenig",
    "subject": "[amsat-bb] Re: SO50 problems and questions",
    "date": "2009-06-10T04:32:32Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/J5SC6XKL5CYVQINMOHKGSOGTQETN56WV/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "I also forgot to mention that a PreAmp makes all of the difference. I worked\na few passes with N5AFV this past weekend for Museum Ship weekend, and he\nlet me borrow his preamp. On AO-27, it went from an S-1 to an S6, and with\nSO-50 it went from an S-0 (still audible though) to an S-4. I'll also\nembarrassingly admit that I had my arrow pointed in the wrong direction (for\npart of the pass), and AO-27 was still audible with an S3, but only with the\npreamp.\n\nI believe we used an AAR SP450VDA.\n\nOn Tue, Jun 9, 2009 at 11:22 PM, Andrew Koenig <[email protected]> wrote:\n\n> I would try taking the antenna off of the tripod for a little while. The\n> polarization of the satellites changes constantly, and with the antenna on\n> the tripod, it's difficult to compensate for those changes.\n>\n> Also, AO-51 is a much stronger bird than SO-50, but AO-27 is the strongest\n> at the moment. AO-27 has the same frequencies as SO-50, but there is no\n> tone, and it's got a timer on it that turns it on when it reaches (about)\n> the Gulf Coast line (for the purposes of maintaining battery power). You'll\n> have time to get your antenna in the right place with the 20 seconds of\n> telemetry it starts with (see http://www.ao27.org/AO27/index.shtml for a\n> schedule).\n>\n> For your situation, I would recommend trying AO-27 until you are familiar\n> with the satellites. AO-27 isn't as crowded as AO-51, but it's also not as\n> quiet (both in traffic and output) as SO-50.\n>\n> Don't quote me on it, but I think AO-51 has less than 500mW output right\n> now, AO-27 is 500mW and SO-50 is 250mW.\n>\n> Good luck! Once you get the hang of it, it's easy enoguh that a teenager\n> can do it (I'd know..)\n>\n> 73 de KE5GDB\n>\n> On Tue, Jun 9, 2009 at 9:18 PM, LeRoy Miller <[email protected]\n> > wrote:\n>\n>> Hello\n>>\n>> I am relatively new (- I have been tring on my own to get the hang of\n>> working the satellites) with little or no luck.\n>>\n>> I have been posting my failed results to twitter and getting over\n>> frustrated in my attempts - luckly there have been a few who have given me\n>> pointers. And one very nice person kl7cn let me call him and he talked me\n>> though a few things during the call he said maybe I should try the SO50. So\n>> today I did try it\n>> And much to my surprise and happiness it was easy enough to pickup and\n>> find and things seemed to working for me (He told me that is was a quite\n>> machine and that I might have to look for it a bit)\n>> The pass I tried was at 1710 UTC (110 pm local est) and the sat was moving\n>> from the southwest to the northeast from my previous trys on the AO51 I knew\n>> that I would probably not get it while it was still low (less then about 20\n>> degrees - also because of where I was pointing the antenna that low I was\n>> pointing right at a building) I reasoned that if I started looking at about\n>> 24 degrees I would being doing much better (so that is what I did) at about\n>> 1714 or 1715 UTC I had heard the SO51 for the first time, still a bit rough\n>> and probably still a little low by the time it was up around the 40 degree\n>> mark I thought\n>> What the heck I am here, people are talking why not try to make a contact\n>> - so that is what I did\n>> I think I waited just a little longer got a nice strong signal and put my\n>> call out\n>>\n>> KD8BXP em79 --\n>> What I heard on the downlink really surprised me - it was this horrable\n>> noise (it almost sounded like when 2 people double) I don't know what I did\n>> but thought ok maybe feedback from the microphone so I unpluged the external\n>> and tried again\n>> I got the same horrable sound\n>>\n>> Now I am sorry up front for this noise I am sure people heard it - so if\n>> you were on around 1717 - 1720 I am so sorry upfront\n>>\n>> But that leads me to my question - what did I do wrong?\n>> And how can I correct the problem and try again\n>>\n>> I have been really frustrated with the AO51 so much so that I almost put\n>> my rig antenna and what not on ebay 3 days ago - I cooled off but I really\n>> want to work this bird\n>> It seemed (at least to a newbie) an easy one to find and maybe make\n>> contacts on.\n>>\n>> You will need to know the setup:\n>> TH-D7 A (not the G model I have a G but didn't use it this time)\n>> Arrow (2 meter/440) mounted to a telescope tripod\n>> Eeepc running ubuntu linux a gpredict\n>> External mic for the radio\n>> I was on 145.850 pl 67hz for the uplink\n>> And 436.800 for the downlink\n>> Radio was in duplex mode and sql was turned off (or open if you prefer)\n>> And the balance on the speaker was set for only the 440 side\n>> I was at 40 - 50 degrees when I first keyed up and the second time would\n>> have been when it was at its highest point of between 64 and 74 degrees\n>> I was on the high power setting\n>> I have used this radio for both local repeater work and aprs and no one\n>> has ever told me that it was making horrable noises\n>> And I think if it was making horrable noises while transmitting aprs the\n>> data would be corrpted\n>>\n>> I hope I have given enough information. I hope someone can help I don't\n>> want to make horrable noises again\n>>\n>> One other thing but I am sure it is my problem not one that someone fix so\n>> to speak\n>> Once the satellite reached its max and started back down - I lost it\n>> completely couldn't find it again\n>> I think it was me one leg on the tripod is bent and started to collaspe\n>> while I was turning the antenna to start it pointing in a north east direct\n>>\n>> Thanks for the help in advance I write a lot to ask something simple sorry\n>> about that\n>>\n>> LeRoy, KD8BXP\n>> Sent on the Now Network™ from my Sprint® BlackBerry\n>>\n>>\n>> _______________________________________________\n>> Sent via [email protected]. Opinions expressed are those of the author.\n>> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>>\n>>\n>\n>\n> --\n> Andrew Koenig\n>\n>\n\n\n-- \nAndrew Koenig\n",
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