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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/4YPQVB26OA6VLT5F6LX2MEYT56ALTWUF/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "4YPQVB26OA6VLT5F6LX2MEYT56ALTWUF",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/BJGAO3WRW6DLGU3GCQZSIL3FFK2OFHCH/",
    "sender": {
        "address": "xe2at (a) hotmail.com",
        "mailman_id": "46f2faa6c0b84b0780942798faed65ca",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/46f2faa6c0b84b0780942798faed65ca/emails/"
    },
    "sender_name": "Alvaro de Leon Romo",
    "subject": "[amsat-bb] Re: 75 ohm CATV Cable on 70 cm",
    "date": "2007-05-22T15:24:28Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/IJROL2STSY4Z6VQ7DREV54LFLZVEAEYU/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "\nI read about it and I have dude what kind of 75 ohms cable are you using ...\nIn 70 cm I am using CATV hard line 1/2 inches for about 50 feets and in the \nrotor section I am using RG6, when AO40 was ON I can run 100w and no problem \nabout the RG6 cable :-)\nIn other way I am using same cables for EME in 144 MhZ and I run 400w with \nany problem that you are describing, I know that CATV hard line may be is \nnot a problem but RG6 have no problem also, here SWR both instalations are \n1.1 :-)\nI recomend 100 % both cables\nSincerely Al\nXE2AT\n\n>From: SV1BSX <[email protected]>\n>To: [email protected]\n>Subject: [amsat-bb] Re: 75 ohm CATV Cable on 70 cm\n>Date: Tue, 22 May 2007 02:19:41 -0700 (PDT)\n>\n>...yes, I tryed that on my 2nd QTH because my\n>experience with 100ft of RG213 was very bad on UHF.\n>\n>It was Sunday - no chance to buy something better..\n>so I decided to replace the RG213 with 75 Ohm TV\n>cable.\n>\n>  Well, the receiving-difference it was spectacular!\n>With 75Ohm cable it was possible to hear Loud & clear\n>the FO-29 downlink, with RG-213 not good enough!\n>  The same I noticed with other Satellites and weak\n>signal ground stations.\n>\n>  Later, after few weeks I replaced the 75 Ohm cable\n>with AirCom+.  Nothing changed between 75 Ohm TV and\n>AirCom+ in the receiving! Absolutely equal receiving\n>between the two cables, even if the AirCom+ was \"10\n>times\" much more expensive cable!\n>\n>  But in transmittion, it's obvious that the 75 Ohm\n>cable has problem. It is not the mismatch (SWR 1.5)\n>but this cable probably can not drive output Power\n>bigger than 5-10 Watts. I confirmed that with 2-3 RIGs\n>and several type of antennas. If you have output Power\n>bigger than 10 Watts, is possible the RIG to\n>decrease the Power output (ALC action? protection? I\n>don't know!)a few seconds after PTT's press. (I'm\n>talking always for UHF band).\n>\n>  So, from my experience I believe that the 75 Ohm is\n>excellent in case you need a separate cable from\n>UHF-LNA output upto the Shack.\n>I noticed that the Loss for 100ft at 450 MHz is about\n>2-2.5 dB, very Low-value for a cheap cable.\n>  For transmittion is a cheap choice, if you have up to\n>5-10 Watts maximum Power on UHF.\n>\n>  Hope that helps\n>\n>73, 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 \n>snooze, you lose. Get messages ASAP with AutoCheck\n>in the all-new Yahoo! Mail Beta.\n>http://advision.webevents.yahoo.com/mailbeta/newmail_html.html\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_________________________________________________________________\nWindows Live Spaces en Prodigy/MSN: Tu espacio en la red \nhttp://spaces.live.com\n\n",
    "attachments": []
}