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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/6GSKPP2NVSSPHRKS7I6KCNSWXNUMFI3S/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "36820.62.194.134.114.1222520823.squirrel@customer.itr-datanet.com",
    "message_id_hash": "6GSKPP2NVSSPHRKS7I6KCNSWXNUMFI3S",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/S7R4WZ4BEUY5PDZB7UH742QWT2JBMGR2/?format=api",
    "sender": {
        "address": "rob (a) itr-datanet.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Rob Hardenberg PE1ITR",
    "subject": "[amsat-bb] Re: Status DO-64?",
    "date": "2008-09-27T13:07:03Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/YY5IYQIXWPOS63IY4JWQ6JKZIXNG4NVV/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4U5MAYZYHSSTO7UXZ46MZBJ4D525UKJP/?format=api",
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/N4FWCKSHI3V7XJ2TY6VHQSXOEU7T6HIO/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "The transponder noise is very audiable. I have listened (looked) to the transponder downlink with\nDSP waterfall and transmitted with 100w on the uplink. Not a trace of any signal. I don't think\nthis is a polarisation matter. Normally 10w on the uplink is sufficient to get a solid signal on\nthe downlink.\n\nOn september 15th I had a 57 signal from de DO-64 transponder and suddenly my signal disappeared. \nAt the time beacon and transponder noise where still audiable. It looks like a problem with the\nreceiver.\n\n73 Rob PE1ITR\n\nOZ1MY schreef:\n> Hi Mak,\n> Yes I have made QSOs as well. Last time was 9th of September.\n> In the start of the life of the transponder it was much easier.\n>\n> I do not know what is different - but one thing could be the\n> attitude of DO-64. If that is the course I would expect the\n> effect to change from orbit to orbit ?\n>\n> One thing that is sure is that it is on the receive side.\n> Even without a preamplifier I can hear the noise floor\n> of the transponder.\n> May be something has gone wrong - only time will show.\n>\n> Perhaps someone from Delfts knows ?\n>\n> 73 OZ1MY\n> Ib\n> ----- Original Message -----\n> From: \"SV1BSX\" <[email protected]>\n> To: <[email protected]>\n> Sent: Saturday, September 27, 2008 1:04 PM\n> Subject: [amsat-bb] Re: Status DO-64?\n>\n>\n>> Hi Ib,\n>>\n>> tks for reply and informative note.  However I wondering about the DO-64 !\n>> If you \"shoot\" the satellite with 2x19 el and 70 W, I suppose the ERP from\n>> a similar system is 2-3 KWatts.\n>>  In case you had not easy access to satellite with this power, I wondering\n>> what is changed, as I remember that during the first weeks of\n> transponder's\n>> activation the satellite was accessible, even if somebody was using\n>> 200-300 Watts ERP (that is my max power and I managed a lot of QSOs).\n>>\n>>  Anyway, too bad if the satellite-uplink is not enough sensitive any\n> longer.\n>> I can't imagine  ....5-10 KW ERP uplink-power for a good enough access.\n>> This way is a non-usable object for the majority of amateur satellite\n>> operators.\n>>\n>> 73, Mak SV1BSX\n>>\n>>\n>>\n>>\n>> ----- Original Message -----\n>> From: \"OZ1MY\" <[email protected]>\n>> To: \"SV1BSX\" <[email protected]>; <[email protected]>\n>> Cc: <[email protected]>\n>> Sent: Saturday, September 27, 2008 12:46 PM\n>> Subject: Re: [amsat-bb] Re: Status DO-64?\n>>\n>>\n>> > Hi Mak and Rob,\n>> > I just had a pass here over Copenhagen with\n>> > max elevation of 86 degrees.\n>> > I were able to hear myself using 70 W to my\n>> > normal 2x19 element antenna - but very faint.\n>> > I also heard a CW station.\n>> > Conclusion - it is on but very difficult to use unless\n>> > you have a lot of power for the uplink (more than I have).\n>> > Have a nice weekend all\n>> > 73 OZ1MY\n>> > Ib\n>> > ----- Original Message -----\n>> > From: \"SV1BSX\" <[email protected]>\n>> > To: <[email protected]>\n>> > Sent: Saturday, September 27, 2008 11:33 AM\n>> > Subject: [amsat-bb] Re: Status DO-64?\n>> >\n>> >\n>> >> Hi Rob,\n>> >>\n>> >> I agree.  Today morning I tried at 08:02 - 08:10Z,  Orbit #2252,\n>> > excellent\n>> >> pass\n>> >> for my location.\n>> >>\n>> >>  As you pointed out,  I also heard the beacon with a true 559 on CW (Hi\n>> >> Hi\n>> >> DELFI-C3),\n>> >> however it was impossible to access the transponder.\n>> >>\n>> >> So, your note is correct.\n>> >>\n>> >> 73, Mak SV1BSX\n>> >>\n>> >>\n>> >>\n>> >> ----- Original Message -----\n>> >> From: \"Rob Hardenberg PE1ITR\" <[email protected]>\n>> >> To: <[email protected]>\n>> >> Sent: Saturday, September 27, 2008 11:13 AM\n>> >> Subject: [amsat-bb] Status DO-64?\n>> >>\n>> >>\n>> >> > Hi All,\n>> >> >\n>> >> > Er there station making qso's on DO-64? Last 2 weeks I tried serveal\n>> > times\n>> >> > but I can't hear my\n>> >> > signal on the transponder. It looks like the transponder receiver is\n>> >> > not\n>> >> > working. I can hear the\n>> >> > beacon and transponder noise very well.\n>> >> >\n>> >> >\n>> >> > 73 Rob PE1ITR\n>> >> > http://www.pe1itr.com\n>> >> >\n>> >> > _______________________________________________\n>> >> > Sent via [email protected]. Opinions expressed are those of the\n>> >> > author.\n>> >> > Not an AMSAT-NA member? Join now to support the amateur satellite\n>> > program!\n>> >> > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>> >>\n>> >>\n>> >> _______________________________________________\n>> >> Sent via [email protected]. Opinions expressed are those of the\n> author.\n>> >> Not an AMSAT-NA member? Join now to support the amateur satellite\n>> >> program!\n>> >> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>> >>\n>> >\n>> >\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> 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",
    "attachments": []
}