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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/KGGC4BVHYDIJTXQGPTYQTBTKXDIEDHRH/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "KGGC4BVHYDIJTXQGPTYQTBTKXDIEDHRH",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/OSTB3JEC2HQYTH36C72TTRCAD5J7QDJM/?format=api",
    "sender": {
        "address": "bill (a) hsmicrowave.com",
        "mailman_id": "d7ecbf0c1df148f289f27dd7a8c37974",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/d7ecbf0c1df148f289f27dd7a8c37974/emails/?format=api"
    },
    "sender_name": "Bill Ress",
    "subject": "[amsat-bb] Re: AMSAT Board of Directors Candidates",
    "date": "2010-06-17T19:21:41Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/YOKMPJY6WHFJMSTY2V5DRPN6HMTFME36/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Rocky,\n\nThe ARISSat-1 uses a linear transponder that is significantly more \nefficient.\n\nThe COMM RX, CMD RX and the half watt output linear COMM TX only draws \n420 mA at 8 VDC. The entire design can also be configured to run \ndirectly from 3.6 Vdc, which is conveniently the voltage of a Lithium \nIon cell. In the absence of the battery cell (if troubles arise with the \nbattery), it could also run directly from a pair of series connected \nsolar cells (but not at the 0.5 watt output level), which typically run \nabout 4.6 V. Additionally, the design can also fit into the CubeSat \nphysical configuration.\n\nSo William's design isn't there yet - at least the last I heard.\n\nSo you ask, why don't we use it in FOX?\n\nWell 420 mA is still too to close to the current output capability for \nthe typical CubeSat solar cell setup. Remember, you also need current to \nrun the IHU, the MPPT etc. But we're always working on improving the \nefficient in the linear mode - so who knows.\n\nThe AMSAT-UK FUNCube folks will be designing a linear U/V transponder \nfor their CubeSat, so we'll be watching their results closely.\n\nRegards...Bill - N6GHz\nARISSat Team Member\n\nRocky Jones wrote:\n> \n> \n>> Just have a look at PE1RAH William Leijenaar web page http://www.qsl.net/pe1rah/\n>>\n>> and look at his nano sat transponder satellite\n>>\n>> http://www.qsl.net/pe1rah/mysat2.htm\n>>\n>>\n>>\n>> Luc Leblanc VE2DWE\n>> Skype VE2DWE\n>> www.qsl.net/ve2dwe\n>> DSTAR urcall VE2DWE\n>> WAC BASIC CW PHONE SATELLITE\n>>\n>>  \n> \n> It is a clever device.  I've never been clear as to why AMSAT NA is not using it.  Works great on the Indian satellite..\n> \n> Robert G. Oler  WB5MZO Life member AMSAT ARRL\n>  \t\t \t   \t\t  \n> _________________________________________________________________\n> Hotmail is redefining busy with tools for the New Busy. Get more from your inbox.\n> http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_2\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",
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}