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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/437LFZYWCRM4UX4HN2XPQJ2ZABHMCD6K/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "030220082110.27821.47CB17A900065B1700006CAD22165384960B9D04C999@comcast.net",
    "message_id_hash": "437LFZYWCRM4UX4HN2XPQJ2ZABHMCD6K",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/437LFZYWCRM4UX4HN2XPQJ2ZABHMCD6K/?format=api",
    "sender": {
        "address": "w7lrd (a) comcast.net",
        "mailman_id": "717aa2a241704c7497e9abd8c983f6b7",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/717aa2a241704c7497e9abd8c983f6b7/emails/?format=api"
    },
    "sender_name": "[email protected]",
    "subject": "[amsat-bb] Re: recent AO-40 efforts?",
    "date": "2008-03-02T21:10:01Z",
    "parent": null,
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/PZVHHUCGBZTZHUTGYTE3VDTPRYUQVP6I/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Just dreaming-It's the year 2035 and 90 year old W7LRD, heard AO-40 for the first time in over thirty years.  Using very antique equipment, that was not controled by mental telepathy.\n73 Bob\n\n\n--\n\"if this were easy, everyone would be doing it\"\n\n-------------- Original message -------------- \nFrom: \"Don Ferguson\" <[email protected]> \n\n> Auke de Jong, \n> \n> I believe AO-40 was designed by AMSAT to not allow both sets of batteries to \n> be disconnected. We should have learned with AO-7 that every satellite \n> should be able to work on solar power alone as eventually all batteries will \n> fail. It is my understanding that the only chance we have is if the \n> batteries burn open some day in the future. \n> \n> Someone else my be able to correct my understanding if I have misunderstood \n> the AO-40 design. Hopefully those who designed the power system have moved \n> on and we now have some better insight. \n> \n> Don \n> -----Original Message----- \n> From: [email protected] [mailto:[email protected]] On \n> Behalf Of Auke de Jong, VE6PWN \n> Sent: Saturday, March 01, 2008 7:53 PM \n> To: AMSAT-BB \n> Subject: [amsat-bb] recent AO-40 efforts? \n> \n> I noticed that during the last period of documented efforts to recover AO-40 \n> 4 years ago, there were promising results about hearing faint signals. By \n> my interpretation of those old reports, they basically confirmed that the \n> command receiver was working but could not get much else done with it. Now \n> that it has been officially silent for several years, has anyone tried to \n> send commands to it in order to disconnect the (shorted) battery banks via \n> the relays onboard? Given the changing sun-angles on the arrays and the \n> passage of time, as well as possible heating of certain onboard components \n> due to the constant supply of solar power to the shorted batteries, could \n> there be any possibility of (energizing) the battery-disconnect relays? I \n> presum e that they are in a fail-close arrangement, because if they were \n> fail-open, they should have already done-so due to the shunted power system. \n> Also, could the solar panels have fuses that have opened? could such fuses \n> be re-settable? \n> \n> I would be interested to hear what knowledge there exists about the present \n> status of AO-40, especially what \"google\" couldn't fetch. \n> \n> Auke de Jong \n> VE6PWN \n> DO33go \n> Edmonton, AB \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> 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",
    "attachments": []
}