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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/P3NX34JLJK2G6YKXEZ6CV43LZMJ35AXZ/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "P3NX34JLJK2G6YKXEZ6CV43LZMJ35AXZ",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/HNI4LRJ2V6HPHTYSXHPG23LNXOCV5YIK/?format=api",
    "sender": {
        "address": "walterh (a) k5wh.net",
        "mailman_id": "269d35853c9e4103ad40904b3e996e31",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/269d35853c9e4103ad40904b3e996e31/emails/?format=api"
    },
    "sender_name": "Walter Holmes",
    "subject": "[amsat-bb] Re: TS2000 Birdie Follow-Up",
    "date": "2011-11-30T21:18:57Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/HNI4LRJ2V6HPHTYSXHPG23LNXOCV5YIK/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "I have used a HamTronics downconverter on my TS-2000x for many years, and it\nworks perfect.\n\nBut, to be clear, I am downconverting the UHF signal into the receive ONLY\njack of the radio, on 10 meters.\n\nThis virtually eliminates the birdie problem, and allows for full rig\ncontrol with SatPC32 just perfectly.\n\nI have a coax switch on the UHF antenna, for when I need to work the UHF\nbirds that do not have an output on the birdie freq.\n\nSadly that it cost about $100.00 to resolve the issue, but that's a small\nprice to pay to still be able to use all the other features of the radio.\n\nWalter/K5WH\n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On\nBehalf Of John Papay\nSent: Wednesday, November 30, 2011 1:13 PM\nTo: [email protected]\nSubject: [amsat-bb] TS2000 Birdie Follow-Up\n\nKC9DOA mentions that he still had the birdie problem with a downconverter\nand that is understandable.\nThe TS2000 radiates the birdie and if your downconverter is not shielded or\nthe UHF antenna is too close to the radio, you might still pick it up.\nSimple experimentation will find the right combination to virtually\neliminate the birdie.  So try a UHF handi or mobile unit and see if it hears\nthe birdie on 436.798.  Then move things around to see if you can minimize\nthe effect.  I've been able to do that in the sat truck and don't have the\nproblem at the base station.  Try a dummy load on the UHF antenna jack on\nthe\nTS2000 as well.  Use quality coax with good shielding.\n\nDrew posted a link to High Sierra Microwave for a UHF down- converter that\nis up-to-date in design and performance, all at a reasonable price.  The\nspecs call for a 5v supply but Bill N6GHZ advised that the converter will\noperate fine up to 16vdc input.  No special supply required.  He also\nmentioned that the converter will perform well from 432 to 438 MHz.  So this\nis one possible source of a current production downconverter manufactured by\nsomeone who knows satellites.  The output IF is lower but the TS2000\nreceiver is continuous so there should be no problem.  Instead of a 407MHz\noffset, use 425MHz and the receiver shifts down to 10MHz for a 435MHz input:\n\ndoppler.sqf entry:\nAO-27,436795,145850,FM,FM,NOR,425000,0\n\nI've not seen a whole lot mentioned about the Funcube performance when\nconnected to a big antenna in a crowded RF environment.  I've had mine on\nthe KLM's and the performance is poor because of overload.  Cavity filters\nwork wonders but not everyone has them.\nHigh Sierra also makes front end filters and filter/LNA combinations for the\nFuncube as well as other products which make the Funcube more versatile.\nIt's worth checking out the webpage to see what is available.\n\n73,\nJohn K8YSE  \n\n_______________________________________________\nSent via [email protected]. Opinions expressed are those of the author.\nNot an AMSAT-NA member? Join now to support the amateur satellite program!\nSubscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n\n\n",
    "attachments": []
}