Email Detail

HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/SN3YTY7OSLMJY22M6Q4LEQWSJORRZQGZ/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "SN3YTY7OSLMJY22M6Q4LEQWSJORRZQGZ",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/LFVTCVHQKHGTG76CMC64BAMU6FK5QJFJ/?format=api",
    "sender": {
        "address": "mike.kc9doa (a) sbcglobal.net",
        "mailman_id": "8e13dc0b118a4d5e899af9ee0a3fe3c3",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/8e13dc0b118a4d5e899af9ee0a3fe3c3/emails/?format=api"
    },
    "sender_name": "Mike Miller",
    "subject": "[amsat-bb] Re: TS2000 ~436.798 MHz Birdie Solution",
    "date": "2011-11-30T17:55:48Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/LFVTCVHQKHGTG76CMC64BAMU6FK5QJFJ/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/MEHYNW2M4OIJMPAGYX2NVSZGS5ZZ5KFW/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi John,\n\nI had heard of the down converter solution before and purchased \na used down converter. Unfortunately it seemed to pick up the TS-\n2000 bird nearly as well as the TS-2000. I just lashed the setup \ntogether so maybe taking more care to isolate the converter from \nthe TS-2000 might improve my results. I'll have to give it a try \nagain.\n\nMike kc9doa\n\nOn 30 Nov 2011 at 10:49, John Papay wrote:\n\n> As many of you know, my satellite radio is a TS2000X.\n> If you have visited my satellite webpage, you have seen\n> many recordings of AO-27 and SO50 from AOS to LOS.  Most\n> of these recordings were made when I was not sitting in\n> front of the radio.\n> \n> At first I used a uhf mobile to hear AO-27 and SO-50.  The\n> problem was that those radios were not computer controlled\n> so you had to tune for the doppler.  That worked fine when\n> I was in the shack, but it didn't work when I was away.  The\n> obvious solution was another radio that didn't have the\n> birdie\n> problem, or a simple UHF to 10M downconverter which wouldn't\n> have the birdie problem.  Back in the day, UHF and VHF down-\n> converters were very popular because we didn't have a lot of\n> DC to Light radios out there.  Now these converters are\n> sitting\n> in junk boxes and are long forgotten by their owners.\n> \n> One of the more popular manufacturers of these inexpensive\n> downconverters was Hamtronics.  They made all kinds of stuff\n> for repeaters etc.  At first their products were not that\n> great,\n> but they evolved into some better designs including their\n> UHF to 10m downconverters.  Unfortunately most downconverter\n> manufacturers stopped making them when the devices they were\n> using\n> became obsolete and unavailable.  The use of current\n> production\n> devices required a redesign of their PC boards and since the\n> demand\n> was no longer there, these products were abandoned.\n> \n> I was fortunate to find a Hamtronics converter on a qrz.com\n> posting\n> from several years back.  It never sold back then and the owner\n> still\n> had it.  I purchased it and ran some tests on it against the\n> receiver\n> in the TS2000.  It turned out that the downconverter had a\n> slightly\n> better sensitivity than the TS2000!\n> \n> The big concern when using a converter or preamp is the fear\n> of\n> transmitting into it and smoking the front end.  But the\n> TS2000\n> has an auxiliary antenna jack which is receive only and perfect\n> for\n> a downconverter output on HF.  As Drew mentioned, SatPC32 can\n> compensate for a downconverter and tune the TS2000 for\n> doppler\n> in the 10m band.  This allowed me to track AO-27 AO-51 and\n> SO-50\n> unattended and make all those recordings without any human\n> intervention.\n> \n> A coaxial transfer relay was inserted into the uhf antenna line\n> so\n> that when the converter was in use, the UHF antenna was\n> switched\n> to the downconverter input (which outputs to the aux antenna\n> jack\n> on the TS2000) and the UHF antenna jack on the TS2000 is\n> switched\n> to a dummy load.  So if you transmit on UHF, power goes into\n> the\n> dummy load and all equipment is safe.  When I want to transmit\n> on\n> UHF (VO-52 and AO-7 mode B), the coax relay switches the UHF\n> antenna\n> back to the UHF antenna port on the TS2000.  The downconverter\n> is out\n> of the antenna circuit at this point.  I did not use the\n> downconverter\n> when operating on FO-29 so the aux antenna jack had to be\n> switched to\n> normal in the tS2000, menu #18 (FO-29 is a linear bird that\n> outputs on\n> UHF, currently not working).\n> \n> Every owner of a TS2000 that operates satellites needs a UHF to\n> 10M\n> downconverter.  Hamtronics is making a VHF to 10M downconverter\n> now.\n> If everyone emailed them to encourage them to make a UHF model,\n> they\n> might just do it.  The only other solution is to make one\n> yourself,\n> or find a used downconverter or transverter that is gathering\n> dust on\n> someone's shelf.  I now have an IC910H and am doing comparisons\n> against\n> the TS2000.  My first impression it that I prefer the TS2000\n> but that\n> might be because I'm so familiar with it.  I use another TS2000\n> in the\n> mobile sat truck but don't have a downconverter for it.  I\n> simply use\n> a uhf mobile for receive on AO-27 and SO-50 since I'm in front\n> of the\n> radio and don't run it unattended.  I have a coax switch to\n> switch\n> the UHF antenna from the TS2000 to the UHF mobile.\n> \n> Now that AO-51 is silent, all of the FM operation is on SO-50\n> and AO-27.\n> If you have a TS2000, you'll want to investigate the use of a\n> downconverter.\n> \n> 73,\n> John K8YSE\n> \n> \n> _______________________________________________\n> Sent via [email protected]. Opinions expressed are those of\n> the author.\n> Not an AMSAT-NA member? Join now to support the amateur\n> satellite program!\n> Subscription settings:\n> http://amsat.org/mailman/listinfo/amsat-bb\n\n\n",
    "attachments": []
}