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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/RYH6TRTOOI2HBJDAZ7Q7RY5DPTE2ETZX/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "RYH6TRTOOI2HBJDAZ7Q7RY5DPTE2ETZX",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/DS3UUIYVNK6MZKZVKKF4RYYDGNVY2SFV/?format=api",
    "sender": {
        "address": "gary_mayfield (a) hotmail.com",
        "mailman_id": "fe442cdc520e4857a9168b9182091295",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/fe442cdc520e4857a9168b9182091295/emails/?format=api"
    },
    "sender_name": "Gary \"Joe\" Mayfield",
    "subject": "[amsat-bb] Re: usb to serial adapter woes",
    "date": "2010-04-11T12:22:46Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/WVRNJXFI37XUMFZLZQJBUIOLP5VW6XUA/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Do you have any PCI or similar slots?  The card has worked well for me.\n\n73,\nJoe kk0sd\n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On\nBehalf Of Larry Gerhardstein\nSent: Saturday, April 10, 2010 6:37 PM\nTo: [email protected]\nSubject: [amsat-bb] usb to serial adapter woes\n\nI hope someone can shed light.  I'm using SatPC32, but that does not \naffect this problem.\n\nAwhile back I was forced to recycle both of my older computers that had \none built in 9-pin serial port.  Then, I connected the built-in port to \nthe GS-232B rotor interface.  I also purchased some HL USB-RS232 \nUSB-to-Serial adapters, a cable with USB on one end and a 9 pin RS232 on \nthe other end.  I used this gadget to control my transceiver (which is a \nIC910H).\n\nNow I have a new computer which has no (zero) built in serial ports.  \nI'm trying to use two of the USB-to-Serial gadgets and have run into \ntrouble.  If I disconnect all grounding back through the power, I can \nget one of the two to work, either the rotor or the rig-control, but not \nboth at the same time.  Without disconnecting grounding, neither work.  \nIt does not matter whether I'm plugging the USB ends directly into the \ncomputer, using a passive USB hub, or a powered hub--same result.\n\nAll I have to do to get this to fail...is...  Even if the USB ends are  \nnot plugged into the computer and the rig control box is powered off and \nunplugged from power, if I just touch the metal shield on the USB cable \ngoing to the rig control onto the shield connection in the computer or \nhub,  that causes the rotor control to fail.  When it fails, The azimuth \nreading on the G-5500 drops all the way to zero.  The elevation meter is \nunaffected.\n\nIt acts like a ground loop somewhere, but where and how?  I've tried \ndisconnecting the coaxes from the transceiver but no change.\n\nI'm thinking about scrapping these USB-to-Serial things and going to a \n4-Port Keyspan box.\n\nHELP!!\n\n73, Larry W7IN - DN27 in Plains, Montana\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",
    "attachments": []
}