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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/A4OMEGKBB5PW7M4LJZYCZ5TPDJQV2QWB/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "A4OMEGKBB5PW7M4LJZYCZ5TPDJQV2QWB",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/3K2X6T7OZXO4FNYUJJBUA5GBIRPGU3SU/",
    "sender": {
        "address": "dave (a) lostfrogs.com",
        "mailman_id": "9249359cf08d4a63a617ce80fc8b24f7",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/9249359cf08d4a63a617ce80fc8b24f7/emails/"
    },
    "sender_name": "Dave Matthews",
    "subject": "[amsat-bb] Re: Yaesu FT-897 and HRD satellite tracking problem",
    "date": "2007-12-26T23:07:04Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/TNVWL2PI5K2WIXZACW4IWTF5LRL7KFFL/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Thanks Alan!\n\nI also have a bunch of those tiny chokes, and other small ferrites, and \npi network filters for rf as well, and I will install them on my next \nUSB to CAT project as you have suggested.  (To be completed in the next \nfew days from a kit.)  I think that really is a last ditch effort since \nI believe the problem is not RF noise related, but rather a shortcoming \nin the Yaesu rig.  But I have been wrong many times before and I have an \nabundance of crows that visit by back yard, I may have to make a meal of \none!\n\nI do find that reducing the update frequency in the tracker program \n'current data' makes it less obnoxious, so that is good news!\n\nSo I will continue to work on RF noise abatement.  Thanks for the response!\n\nThanks again Alan!\nDave, KI4PSR\n\n\n\nAlan P. Biddle wrote:\n> Dave,\n> \n> Something to try is to put a choke in series with the individual leads in\n> the CT-62 line.  These are small, about the size of a 1 watt resistor with\n> the conductor through the center.  They will have no effect on the\n> relatively low frequency components in the CAT signal, but may help with the\n> RF pulses.  I used this very successfully with another interface, though\n> each situation is different.  I have a drawer full of them if you wish to\n> try them.  Also, you may be able to bypass the RF with some disc capacitors.\n> \n> 73s,\n> \n> Alan\n> WA4SCA\n> \n> \n> \n> _______________________________________________\n> Sent via [email protected]. Opinions expressed are those of the author.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n> \n",
    "attachments": []
}