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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/NH6IRK4KQL26LVE2BK7CWZOYX7M4PZMB/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "B14951489B444C43BB4DEA04C0070D7C@laptopmatthias",
    "message_id_hash": "NH6IRK4KQL26LVE2BK7CWZOYX7M4PZMB",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/4CKTZTHKJPHUKIZQNF4FR2MLFT3CILJD/?format=api",
    "sender": {
        "address": "matthias.bopp (a) gmx.de",
        "mailman_id": "8e98db3953494c5f92cac72f4aa25f2c",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/8e98db3953494c5f92cac72f4aa25f2c/emails/?format=api"
    },
    "sender_name": "Matthias Bopp",
    "subject": "[amsat-bb] Re: Alt-Az telescope mount for Antenna",
    "date": "2010-06-02T19:02:22Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4CKTZTHKJPHUKIZQNF4FR2MLFT3CILJD/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hello all,\n\nI have a little description on using a Celestron Alt-Az mount for small\nmicrowave antennas. You can find it on my website at www.dd1us.de in the\nsection ham downloads. It is presently only in German but as there are\npictures included you should understand the concept. The name is \n\"Die NexStar GT Montierung als Präzisionsrotor für Mikrowellenantennen\".\n\nThe speed of the mount should be sufficient to also track LEOs as it is used\nfor the same purpose for tracking satellites with the telescope itself. \n\nThere is a freeware program called satellite tracker which does this.\n\nOne problem is that the mount has a clutch and if the torque (like Rick\nexplained below) gets to high it will slip.\n\nBest regards\n\nMatthias DD1US\n\nwww.dd1us.de\n\n\n-----Ursprüngliche Nachricht-----\nVon: [email protected] [mailto:[email protected]] Im\nAuftrag von [email protected]\nGesendet: Mittwoch, 2. Juni 2010 01:58\nAn: [email protected]\nBetreff: [amsat-bb] Alt-Az telescope mount for Antenna\n\nHello all, I'm new to the boards here and was browsing through and saw a\npost a few weeks ago about using an Alt az Telescope mount as an antenna\nrotor. \n\nI didn't see a response so I'll add my .0661 Malaysan Ringgits based on my\nexperience as an Amateur Astronomer.\n\nFirst I have to presume that the OP already has the mount in question as a\npurpose made rotor could be had for a lot less money.  \n\nFirst I'd think wind load on a typical antenna wouldn't be that much, but I\nwould mount the antenna with it's center of gravity as close as possible to\nthe elevation axis.  Since a telescope would be mounted with its CG ON the\nElevation axis, you'd want to keep the  Antennas CG as close as possible to\nminimize and torque loads on the gears.  I'd also use a sturdy dovetail\nmount, though that being said it looks like the mount in question is more\nthan capable of handling the weight. \n\nAlso make sure that the antenna will clear all aprt of the mount though it's\nentire range travel.\n\nAs for tracking, I'm not sure if it will track fast enough. I couldn't find\nany specs in that regard.  I know the Meade Autostar can accept Keplarian\nelements and track sats. Quite frankly it looks like a pain to upload them\nand I've never tried it, though I've been tempted. \n\nSince I've gotten interested in working the birds (Still have yet to make a\nQSO, Building an antenna and amassing the needed equipment), I've been\nlooking at my Orion EQ1 German mount as a possible rotor.  It's a basic\nMount and I've figured if I mount the antenna with the beam paralell to the\nDec shaft, alI have to do is set the lattitude comlimentary to the Max\nelevation (90 Deg - Max El) and point the RA shaft opposite the Max\nElevation Azimuth, it will track the path of the sat.  It won't track using\nthe Clock drive, but I should be able to keep up using the slow motion\ncontrols. That being said, substututing a faster motor shouldn't be too\ndifficult for a later project. \n\nHope this helps.\n\nNow if someone could show me how to reply to  thread on the archives......\n\n73\n\nRick\nK7TEJ DM33vq\n\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\n\n",
    "attachments": []
}