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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/G7B6KVW7BXNP7EL6TSES4MLWI7R4ZKR3/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "0DD6C259E9AD4B9790B605DF210E6991@David",
    "message_id_hash": "G7B6KVW7BXNP7EL6TSES4MLWI7R4ZKR3",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/5EF4C5COO32RIQOCSIDND4NVI6UESER4/?format=api",
    "sender": {
        "address": "david (a) cdwing.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "David Wing",
    "subject": "[amsat-bb] Re: Running Power to the Polarity Switch",
    "date": "2009-11-20T17:19:22Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4RLUELJCLV2CPFWGU4V3RNXPZKLK52FU/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Right, I expect the long wire goes to +12vDC and that the negative is run\nover the coax.  Is the only reason to run it over coax to save from having\nto run another wire?  I've got extra wires available and would prefer to run\nit direct rather than on the coax...no problem with that do you think?\n\nI'll be off the birds over the weekend while I move the rotator and cables\naround.\n\n73,\nDavid\nK6CDW\n\n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On\nBehalf Of [email protected]\nSent: Friday, November 20, 2009 7:00 AM\nTo: i8cvs\nCc: amsat-bb\nSubject: [amsat-bb] Re: Running Power to the Polarity Switch\n\nI just rebuilt my rotor/antenna system here, and I am using the \"spare\"\n2-#18 conductors in the rotor cable for each rotor as my 12 volt line to\neach of the yagi's. In the house, I just run to a DPDT switch and use a\nWallWart for the 12 volts. David, I think that long black wire goes to +12\nvolts, not negative, as I noted one wire went to the boom for the return,\nsuspecting he used the coax as the ground point. I may be wrong. \n\nJohn \n\n----- Original Message ----- \nFrom: \"i8cvs\" <[email protected]> \nTo: \"David Wing\" <[email protected]>, \"AMSAT-BB\" <[email protected]> \nSent: Thursday, November 19, 2009 11:07:56 PM GMT -08:00 US/Canada Pacific \nSubject: [amsat-bb] Re: Running Power to the Polarity Switch \n\n----- Original Message ----- \nFrom: \"David Wing\" <[email protected]> \nTo: <[email protected]> \nSent: Friday, November 20, 2009 4:58 AM \nSubject: [amsat-bb] Running Power to the Polarity Switch \n\n> I'm making good progress to get my KLM and Cushcraft antennas mounted on \nthe \n> roof.I think I'll be able to wrap it all up this weekend. \n> \n> \nHi David, \n\nHappy to hear about your progress. \n> \n> I do have a question about the polarity switch on the Cushcraft 30 element\n\n> 440 antenna. The switch has one lead that seems to be intended go to \n+12vDC \n> and the negative lead goes to the boom of the antenna. Do I need connect \n> -12vDC to the coax on my feed line in order to complete this circuit? \n\nNo .........run please a separate wire for the -12 volt DC \n\n> Seems \n> easier to just disconnect the wire from the boom and run it to a dedicated\n\n> -12vDC lead. \n\nA dedicated wire for the -12 volt DC is best \n\nMy switch on my KLM is fed with dedicated leads for + and - \n> and it seems that would be the easiest way to deal with the Cushcraft. \n> \n> \nYes, I agree \n> \n> Am I missing something obvious here? I have wires to spare and can so \nit's \n> not a big savings to me to run the -12vDC on the coax if that is the \nreason \n> why this was designed this way. \n> \nTo run power supply to the above relay I have used a coax cable RG-58 \nThe inner conductor for +12 volt DC and the braid for -12 Volt DC \n> \n> Pointers and suggestions welcome. \n> \n> 73, David \n> \n73\" de \n\ni8CVS Domenico \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_______________________________________________\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": []
}