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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/YHUFK3XK7KBCRNWQV2LXOB45AO43ZE7D/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "002d01c6db4f$8d2be000$6401a8c0@ilc",
    "message_id_hash": "YHUFK3XK7KBCRNWQV2LXOB45AO43ZE7D",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/KZE2H55AEDPL7WCTVR7BA2W42VQGAW3A/?format=api",
    "sender": {
        "address": "oz1my (a) privat.dk",
        "mailman_id": "b2f56900318d4d1193159750f39aa3fe",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/b2f56900318d4d1193159750f39aa3fe/emails/?format=api"
    },
    "sender_name": "OZ1MY",
    "subject": "[amsat-bb] Re: AO-51 mode L/S",
    "date": "2006-09-18T18:23:34Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/KZE2H55AEDPL7WCTVR7BA2W42VQGAW3A/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Michael and amsat-bb\nThere is an explanation to everything. I have used the AO-40 set-up\nwith 40 W on 1268 MHz to 2 19 turn helix antennas, when it was\nnecessary.\nThat accounts to something like an EIRP of 1 kW taking cable\nloss into account.\n\nAgain it confirms Mike, N1JEZ's observations for the L band uplink.\nQuote:\nFor an occasional contact, 150 watts EIRP.\nFor medium level performance, 500 watts EIRP.\nFor superior performance, 1 kW EIRP or higher.\n\nAs Mike also points out, doppler tracking must be correct, PC time\nmust be correct, antenna pointing must be correct and so on.\n\nI use SatPC32 to control the IC-910, which I leave on all the\ntime to avoid temperature drift during warm up periods.\n\nWhen we get AO-51 in mode-L/U it is time to get the frequency\ntracking right for the 1268 MHz uplink.\nThe 70 cm downlink is much easier to hear than the 2.4 GHz downlink.\nThat makes it easier to get the frequency right on the L band\nuplink.\n\nOctober 2 to October 9\nFM Repeater, V/U\nUplink: 145.920 MHz FM, 67 hz PL Tone\nDownlink: 435.300 MHz FM\nFM Repeater, L/U\nUplink: 1268.700 MHz, No PL Tone\nDownlink: 435.150 MHz FM\n\nNOTE: The 435.150 MHz downlink is left hand circular.\n\nHave fun.\n\n73 OZ1MY\nIb\n----- Original Message ----- \nFrom: \"Michael Fletcher\" <[email protected]>\nTo: <[email protected]>\nSent: Monday, September 18, 2006 7:33 AM\nSubject: [amsat-bb] AO-51 mode L/S\n\n\n> Hi all,\n>\n> been copying AO-51 on L/S mode very nicely over the past\n> few days. My setup is a hand-held linearly polarized\n> (yes, you need rotate it to follow the S/C spin) W-LAN\n> patch antenna with a California Microwave downconverter\n> feeding an FRG-9600 modified to feed DC to the D/C.\n> Excellent signals, absolutely no interference, always\n> enjoying the spectacular L band uplinks for various\n> European stations, especially OZ1MY, whom has an\n> exceptionally solid uplink :-)\n>\n> Mostly been listening to eastern and overhead passes,\n> simply because I can sit on my veranda steps, sip coffee\n> and twiddle the knobs & antenna ;-)\n>\n> Really cannot wait for the next L/S session; this mode\n> is a very impressive demo mode for experienced hams that\n> have no idea what satellites can do for you, not to speak\n> of our future generation of hams...\n>\n> 73's Michael, OH2AUE\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",
    "attachments": []
}