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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/B7TN4L6GOVSQ6RHXLW32WTZRFYYHZM7J/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "B7TN4L6GOVSQ6RHXLW32WTZRFYYHZM7J",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/3ZW6DXEXWGCSNZPH2YAQELE3PUKZKIAC/",
    "sender": {
        "address": "al7eb (a) acsalaska.net",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Edward R. Cole",
    "subject": "[amsat-bb] Re: 10' dish radio astronomy?",
    "date": "2006-10-19T06:43:26Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/3ZW6DXEXWGCSNZPH2YAQELE3PUKZKIAC/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "At 03:48 PM 10/18/2006 -0400, Tom Clark, K3IO wrote:\n>\n>You might be interested in the SRT (Student Radio Telescope) activity\n>initiated by the Haystack Observatory. Take a look at\n>http://www.haystack.edu/edu/undergrad/srt/index.html. It is based on a\n>7' (or larger) TVRO dish and the web site contains technical details and\n>suggested projects. About 100 high schools and colleges and a few\n>intrepid amateurs have made SRTs. All the hardware and software for the\n>SRT is open source. Also note the SRT bulletin board at\n>http://www.haystack.mit.edu/edu/undergrad/srt/forum/.\n>\n>For folks who want to purchase SRT hardware, check out\n>http://www.cassicorp.com/; however I note that the last time I checked\n>with Cassi, their delivery times were ~6 months.\n>\n>CASSI makes a nice az-el antenna mount and Haystack has also used the\n>Polish Alfa-Spid rotor (VE6JY and\n>http://www.alfaradio.ca/alfaspid.html). Both use DC motors which\n>provides for high torque at a slow, steady drive speed. You might be\n>interested in the az-el positioning controller for ~24VDC motors -- just\n>click on \"Upgraded Ground Controller\" at\n>http://www.haystack.edu/edu/undergrad/srt/receiver/Downloadable_Resources.h\ntml.\n>While there, also pick up the Functional Block Diagram to get an idea of\n>the scope of the project.\n>\n>By way of \"truth in advertising\", I have had a strong professional tie\n>with Haystack and their projects for 35+ years -- especially in VLBI and\n>Geodesy areas (see http://www.haystack.edu/), and I now serve on their\n>Board of Trustees, so don't expect me say anything bad!\n>\n>73. Tom\n\nFor those interested in using their large dishes (>7-foot) for radio\nastronomy, I direct you to the website of the Soc. of Amateur Radio\nAstronomers (SARA), est. 1971.  They have a annual meeting/conference at\nNRAO Greenbank each summer.\nhttp://www.radio-astronomy.org\n\nI've been a member since 1998 and have used my 8-foot dish for RA.  I'm\nplanning on a 16-foot dish for 1296-eme/1420 RA for summer 2007 (check my\nwebpage for details). \n73's,\nEd - KL7UW \n=========================================\nBP40iq,  Nikiski, AK      http://www.qsl.net/al7eb\nAmsat #3212\nModes: V - U - L - S\nUSA Rep. for Dubus Magazine: [email protected]\n=========================================\n\n",
    "attachments": []
}