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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/XU2HQMVXXXHLBR3DFC7ENUJ2N7YQRT33/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "000001c8413a$134cd490$0502a8c0@athlon",
    "message_id_hash": "XU2HQMVXXXHLBR3DFC7ENUJ2N7YQRT33",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/VXZMSEYNJGTC6GKTIQSKAXHSBQI25AUO/?format=api",
    "sender": {
        "address": "ve4yz (a) mts.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Alan",
    "subject": "[amsat-bb]  EMCOMM, Generators, UPS etc  was Phase 4 versus Eagle",
    "date": "2007-12-18T05:51:46Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/DI4Q5LBX2TPHFEYTWQDUAWOGV6TH7NIR/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/BZWV446WBPDWM4IY7C2YI3KEK2R3ATEZ/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Time for subject change folks. \n\nA question about \"smoothing\" A/C from a generator sufficiently to allow a\nUPS ( computer type such as an APC )to function.\n\nDoes anyone have a DIY schematic for such as device?  I've \"Googled\" and\nfound many commercial power conditioners but they are expensive.  Some more\ncostly than a top of the line generator in the <$1000 range.  Worse, if I\nwere to replace my generator I have no guaranteed that the A/C output would\nbe of high enough quality to charge and run a UPS properly without carry a\nUPS into the store and asking them to fire up their brand new generator.\n\nIt would be nice to stay on the air and have computers running when the\ngenerator is down for a fuel refill and oil check or when it otherwise\nhiccups and shuts down unexpectedly.\n\nHere's the problem.  All the UPS I have such as APC 750, APC 1050 and others\ndon't work when powered by a generator.  They \"see\" the A/C input as being\nsufficiently defective that they trip into battery backup mode immediately\nwhen they should be passing the A/C directly onto the protected devices and\nbe recharging the battery.\n\nAt our last field day we had 4 gas generators on site of varying vintage and\nmake and price range. They ran our networked computers for contest logging,\nradios, rotators, coffee pots, and fluorescent lighting in the tents.  We've\ndone this for several years without a problem.  The A/C quality is good\nenough for the PC power supplies and radios or the external radio power\nsupplies. During FD2007 I decided to add a UPS for each of 3 computers and\nthen found that they all failed.  Testing after FD showed that the\ngenerators were the problem.  We don't use laptops, which, with their\ninternal batteries have their own built-in UPS when you run them on the AC\nadapter.  We use old Pentium desktops because for the last 3 years in a row\nwe have had severe WX overnight, operating tents get blown down, computers\nand radios get soaked etc.  It's part of the fun of FD :-)\n\nThe EMCOMM discussion reminded me that I should deal with this now and not\nwait for FD2008.  Also I should be prepared all year, not just for FD, to\nrun my house, radios and computers in an emergency environment.  Recent ice\nstorms in the U.S. with a million folks without power for a day or two\nreminded me of the ice storm in Quebec several years ago when tens of\nthousands lost power for weeks.  Welcome to global warming and volatile WX.\nAs usual it is a case of \"not IF; but WHEN\".\n\n\nBTW,  I've shown my support for AMSAT, the executive et al by renewing my\nmembership to a Life Time membership prior to all the QRM in the last week.\nI would rather have made a separate donation but up here in the Great White\nNorth we don't get a tax deduction for a U.S. not-for-profit :-(\n\n73, Alan VE4YZ\nEN19\nAMSAT LM 2352\nhttp://www.mts.net/~ve4wsc/\nAMSAT A-485\n \n   \n\n\n \n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On\nBehalf Of Nate Duehr\nSent: December 17, 2007 7:31 PM\nTo: [email protected]\nSubject: [amsat-bb] Re: Phase 4 versus Eagle\n\nMKM wrote:\n> Forget the EMCOMM support, that does not make sense anymore. Read on...\n> \n> WIMAX will be available from sprint soon. THAT will be a reliable \n> technology for ecom. With one access point, they will cover a wide \n> area for both data and voice. NOW, imagine multiple access point ( and \n> I mean 2 or 3 max) and regardless of what the ecom situation is, help \n> will get through.\n\nThis service will be coming from U.S. carriers who wouldn't even put\nbattery/generator backup on most of their wireless POP's until told to do so\nby the FCC after Katrina:\n\n<http://www.datacenterknowledge.com/archives/2007/Dec/10/fcc_ruling_may_spur\n_generator_demand.html>\n\nEven with the new ruling, the FCC only recommends that such sites operate\nfor 8 hours on emergency power.\n\nIn other words, they don't expect the cellular companies to REFUEL those\ngenerators in any timely fashion.\n\nI worked for a large co-location company a few years ago, and we had a\ndiesel contract that was VERY expensive.\n\nI talked to the truck driver once, and he told me that the order of his\nstops in bad weather/disaster situations would have been:\n\nDenver Health Medical Center - the alive ones at the hospital.\nDenver Police Headquarters and the Jail facility - the troublemakers, keep\nthem inside.\nDenver Morgue - if it's warm out, you don't want the dead ones thawing and\nyou probably have outdoor triage and refrigeration going on if things aren't\nquite as bad as Katrina.\nDenver Library - Security.  Historical items.\nOur data center.\n\nAnother route for another truck included the telco central office (Denver\nMain), and the \"telco hotel\" next door, as it's only customers that truck\nwould serve.  As long as the outage lasted, those truck wouldn't leave their\n\"circular\" routes which were planned to arrive just as generators were\nrunning out of fuel in a continuous loop.  Any delay and we (being at the\nbottom) would either fall off the list, or they'd make arrangements to skip\nthe library.\n\nThat was his route with the diesel truck.  He would run around in circles\nand do it all again, if the problem lasted for multiple days.\n.\nCell sites?  Nope.  WiMax sites?  No way.\n\nReality bites:  Cell carriers don't pay to be on priority diesel contracts.\nDiesel deliveries to cell sites are on \"best effort\" \ncontracts.  They fall below everyone else with priority contracts.\n\nGood luck with your WiMax as an EmComm tool.  Let us know how well it serves\nyou when the power goes out and the diesel trucks can't get to all those new\ngenerators at all the WiMax and cell sites\n\nNate WY0X\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",
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}