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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/H7H42TB7AXOTKPSI22KXOH47OUW7K6WE/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "H7H42TB7AXOTKPSI22KXOH47OUW7K6WE",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/NZM7XZXDYC64YVWQV57UE5RBFTAUCX36/",
    "sender": {
        "address": "clive (a) g3cwv.co.uk",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Clive Wallis",
    "subject": "[amsat-bb] Re: Motor for Yaesu G5500 Azimuth Rotator?",
    "date": "2012-03-05T10:38:43Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/NZM7XZXDYC64YVWQV57UE5RBFTAUCX36/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Hi Dave,\n\nMany thanks for your reply to my questions about motor problems.  Sorry \nfor the long delay in getting back to you.\n\nSome time ago, most of the problems we got with the elevation rotators \nwere due to water getting into the unit, due to the lack of proper \nseals.  We don't seem to hear much about this recently. Has the sealing \nbeen improved?\n\nI'm hoping to replace my G5500 later in the year, when the weather is a \nbit warmer :)\n\n73      Clive     G3CWV\n\nHitchin, North Hertfordshire, UK\n\nOn 26/02/2012 17:16, David Palmer KB5WIA wrote:\n> Hi Clive,\n>\n> I haven't heard of failures of the controller or software directly, but\n> this could happen.  A more common problem might be mis-calibration, in\n> that if your elevation rotor reads only 175 degrees and your software\n> and controller is trying to send it to 180 degrees, the thing will keep\n> going until it shuts off at the limit switches in the rotor itself\n> (G5500).  I've seen this before, no problem since the limit switches are\n> fairly robust, but something to keep an eye on.\n>\n> I plan to use the thermal cut-outs for the extra protection as soon as I\n> get a repaired / replacement motor to work with.\n>\n> Yesterday I built a jig for bench testing the rotor.  Cables and\n> connectors are still on the mast, so I needed a way to connect the 7-pin\n> connector to the controller manually, also to a scope to verify\n> alignment of the 500-ohm pot sensor.  Made jig from 6 individual\n> connectors through clear plexiglass, broken out to six terminals on\n> side.  That will help with alignment during reassembly.\n>\n> Also spent some time figuring out how the brake goes together - seems I\n> didn't manage to get photos of it as I took it off of the motor before\n> shipping it out, and just yesterday noticed the spring in there and\n> puzzled over how the heck it works.  Think I have it figured out, though.\n>\n> Dave KB5WIA\n>\n> On Feb 26, 2012 4:24 AM, \"Clive Wallis\" <[email protected]\n> <mailto:[email protected]>> wrote:\n\n",
    "attachments": []
}