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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/IJROL2STSY4Z6VQ7DREV54LFLZVEAEYU/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "IJROL2STSY4Z6VQ7DREV54LFLZVEAEYU",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/BJGAO3WRW6DLGU3GCQZSIL3FFK2OFHCH/",
    "sender": {
        "address": "sv1bsx (a) yahoo.gr",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "SV1BSX",
    "subject": "[amsat-bb] Re: 75 ohm CATV Cable on 70 cm",
    "date": "2007-05-22T09:19:41Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/BJGAO3WRW6DLGU3GCQZSIL3FFK2OFHCH/",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4YPQVB26OA6VLT5F6LX2MEYT56ALTWUF/"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "...yes, I tryed that on my 2nd QTH because my\nexperience with 100ft of RG213 was very bad on UHF. \n\nIt was Sunday - no chance to buy something better..\nso I decided to replace the RG213 with 75 Ohm TV\ncable.\n\n Well, the receiving-difference it was spectacular!\nWith 75Ohm cable it was possible to hear Loud & clear\nthe FO-29 downlink, with RG-213 not good enough!\n The same I noticed with other Satellites and weak\nsignal ground stations.\n\n Later, after few weeks I replaced the 75 Ohm cable\nwith AirCom+.  Nothing changed between 75 Ohm TV and\nAirCom+ in the receiving! Absolutely equal receiving\nbetween the two cables, even if the AirCom+ was \"10\ntimes\" much more expensive cable!\n\n But in transmittion, it's obvious that the 75 Ohm\ncable has problem. It is not the mismatch (SWR 1.5)\nbut this cable probably can not drive output Power\nbigger than 5-10 Watts. I confirmed that with 2-3 RIGs\nand several type of antennas. If you have output Power\nbigger than 10 Watts, is possible the RIG to \ndecrease the Power output (ALC action? protection? I\ndon't know!)a few seconds after PTT's press. (I'm\ntalking always for UHF band).\n\n So, from my experience I believe that the 75 Ohm is\nexcellent in case you need a separate cable from\nUHF-LNA output upto the Shack. \nI noticed that the Loss for 100ft at 450 MHz is about\n2-2.5 dB, very Low-value for a cheap cable.\n For transmittion is a cheap choice, if you have up to\n5-10 Watts maximum Power on UHF.\n\n Hope that helps\n\n73, Mak SV1BSX\n\n \n\n \n\n \n--- Mike Miller <[email protected]> wrote:\n\n> Anyone have any experience using 75 ohm CATV cable\n> on 70 cm?\n> \n> \n> \n> \n> \n> Mike KA5SMA\n> _______________________________________________\n> Sent via [email protected]. Opinions expressed are\n> those of the author.\n> Not an AMSAT-NA member? Join now to support the\n> amateur satellite program!\n> Subscription settings:\n> http://amsat.org/mailman/listinfo/amsat-bb\n> \n\n\n\n       \n____________________________________________________________________________________You snooze, you lose. Get messages ASAP with AutoCheck\nin the all-new Yahoo! Mail Beta.\nhttp://advision.webevents.yahoo.com/mailbeta/newmail_html.html\n",
    "attachments": []
}