Email Detail

HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/NZE5ZNJCCIQWYFXQTVOLPMHQQO5M2ZAT/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "NZE5ZNJCCIQWYFXQTVOLPMHQQO5M2ZAT",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/S77IO23WFC5L4WXWUT6LDJY3V7YKHOL4/?format=api",
    "sender": {
        "address": "gaston.bertels (a) skynet.be",
        "mailman_id": "a9098c79141d4c549d8938740296e6e5",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/a9098c79141d4c549d8938740296e6e5/emails/?format=api"
    },
    "sender_name": "Gaston BERTELS",
    "subject": "[amsat-bb]  Home brewing El. Az. rotators",
    "date": "2007-09-12T08:21:11Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/S77IO23WFC5L4WXWUT6LDJY3V7YKHOL4/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi folks,\n\nTony did a great job building his AZ-EL tracking system.\n\nI have also done some work on this, building a \nlightweight system with a couple of motors from \nmotorized car windows and discarded bicycle parts.\n\nI have used an acetylene welder and manufactured \na tool for forming helicoïdals out of 8mm \ndiameter steel rods you can find in DIY shops. \nThese helicoïdals drive the bicycle chainwheels. \nThe AZ-EL booms are welded on the axes of the chainwheels.\n\nThe tracking sensors are microswitches moved by \nthe teeth of the chainwheels. Zeroing the AZ-EL \npositioning is done by a second pair of \nmicroswitches sensing a 180 degrees semicircular \nrod epoxied to the chainwheels.\n\nI have written the adhoc tracking software in \nDelphi. The electrical interface is a kit sold by \na popular electronics editor (Elektuur). It uses an USB port.\n\nThis lightweight system is very rugged. Angular \nprecision of AZ-EL positioning is limited to \nabout 8 degrees, due to the chainwheel teeth \nsensing. This is sufficient for tracking the ISS \nwith 145MHz crossed yagis.\n\n73\nGaston - ON4WF\n\n-------------------------\n\nAt 03:50 11/09/2007, Tony VK5ZAI wrote:\nHi Guys,\nSeems a lot of talk about rotators lately, have you thought about\nbuilding up your own, I did this around 15 years \nago and the system has\nnever been switched off apart from twice when moving QTH and the\noccasional service, greasing etc. My present QTH is 300 yds from the\nSouthern Ocean and we get some almighty winds in \nthe winter but it keeps\non going. It's driven by 2 windshield wiper \nmotors and constructed of\nparts that can generally be scrounged from \nvehicle and machinery junk\nyards etc. You will require a small welder to put \nit together and access\nto a lathe but really there's no great precision required in it's\nconstruction. I've described it's construction on my web site listed\nbelow. hopefully it will be of interest to some of you.\n\n-- \nRegards Tony.  VK5ZAI\n\nJ.A.(Tony)Hutchison\nP.O.Box 470 Kingston SE\nSouth Australia  5275\n\nNational ARISS Co-ordinator\nand Satellite ground Station.\n\nWeb Site :-\nhttp://www.electric-web.org\n\n_______________________________________________\nSent via [email protected]. Opinions expressed \nare those of the author.\nNot an AMSAT-NA member? Join now to support the \namateur satellite program!\nSubscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n\n\nGaston Bertels, ON4WF\nARISS-Europe Chairman\n\nAvenue Paul Hymans 117 B29\nB-1200   Brussels, Belgium\n\nPhone :\t+32.2.771.67.74\nMobile: \t+32.476.215.124\nFax :\t+32.2.771.49.89\nE-mail :\[email protected]\nhttp://www.ariss-eu.org\n\n",
    "attachments": []
}