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/LTSKDOQNGVEK5PEMC3X5N3J4EQLDU3PF/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "276996DA9BDB45AFACDA860046FD4226@TAMSAT",
    "message_id_hash": "LTSKDOQNGVEK5PEMC3X5N3J4EQLDU3PF",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/LTSKDOQNGVEK5PEMC3X5N3J4EQLDU3PF/",
    "sender": {
        "address": "hs1jan (a) tamsat.org",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Tanan Rangseeprom HS1JAN",
    "subject": "[amsat-bb] Re: V/U Linear Transponder",
    "date": "2013-07-30T16:04:21Z",
    "parent": null,
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/JAHM4II22PVYBWKGOVJNEJYKUSUQP3UH/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Dear All\n\nThanks respond for help to me\n\n1.Thailand has regular to forbid for transmitt UHF band but can receive the \nsignal for amateur radio satellites only. we need to used VHF band same like \ntransponder  of Japanes (FO-29) , AmSat AO-51 , Saudiarabia SO-50 and other \nsatellites. for interference from China Thailand and other countries on VHF \nis normal.\n\n2.Ok, I do not have knowledge 100 khz bandwidth is too much for the over \npower. please advice me for 30 khz uplink 145.90-145.92 MHz VHF / 435.10 - \n435.12 MHz UHF of  liner transponder.\n\n3.We have to design FM repeater use to modify HX1 / RX2A RADIOMETRIX VHF / \nUHF transmitter module we have change x-tal to 145.90 MHz / 13.59 MHz and \nused MC3361 with x-tal 10.245 MHz and CML IC FX465 CTCSS Encode/Decode build \ntest it to be successful.\n\nWe and technical team of TAMSAT group would like to help and advice for \ncircuit diagram of V/U transponder same like transponder of Japanes (FO-29) \nand other satellites. We had mail to Mr.William Leijenaar PE1RAH  but do not \nhave respond feedback. Mrs Thida of 100watts ham radio magazine of thailand \nsugges me to know Mr.William.because she meet him on Tokyo ham fair 2009.\n\nOn this time we and technical team of TAMSAT group need help very urgent. we \nneed advice of circuit diagram or datasheet  IC for build V/U Liner \ntransponder  for payload 1U cubesat of JAISAT satellite project.\n\nbest regards\n\nTanan Rangseeprom HS1JAN\nProject Manager of JAISAT-1\nmember of RAST\nemail : [email protected]\n\n\n----- Original Message ----- \nFrom: <[email protected]>\nTo: <[email protected]>\nSent: Monday, July 29, 2013 5:24 PM\nSubject: Re: [amsat-bb] V/U Linear Transponder\n\n\nDear Tanan.\n\nThanks for the mail via AMSAT.org\n\nMy name is David Bowman  G0MRF and I'm a member of the team building\nFUNcube, due for launch this November.\n\nI can help with transponder design, but there are some points which you\nneed to consider.\n\n1) The use of V band for the uplink will be a poor choice for your\nlocation.  The interference from China and other countries on 145MHz\nwill mean the transponder will not be usable.   Using U band for the\nuplink is a much better choice.\n\n2) The 100kHz bandwidth is too much for the typical power available\n from a CubeSat. If you get your RF team to do a link budget analysis,\nyou will see the cubesat power budget will not support 100kHz of\nbandwidth. Ususally 30kHz is as much as you can do with a 1U cube.\n\n3) You may want to consider a FM 'repeater' as there is now only 1 in\norbit, while there are several linear transponder satellites ready to\nbe launched.\nThe FM design will allow you to run a very efficient power amplifier\n(70%) and power can be saved over oceans and areas of low population by\nusing a 67Hz access tone (CML FX465)\n\nI can assist with design but would need to know if you are planning a\n1U 2U or 3U design.\n\nWilliam PE???? is good, but will probably just offer to sell you a\ntransponder.\n\nRegards\n\nDavid  G0MRF\n\nsome old info is available at   www.g0mrf.com/transponder.htm\n\nThe attached powerpoint has some pictures of the UV transponder and\nother boards in FUNcube from AMSAT-UK \n\n",
    "attachments": []
}