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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/LINKZLG5AXM3Q3IYWPH6Y5BFPENS2YDZ/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "7F76C22DD2DF4E8DBA8FA312B324873B@acer61a4596bd3",
    "message_id_hash": "LINKZLG5AXM3Q3IYWPH6Y5BFPENS2YDZ",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/3LYOLQB2YZP7JTNGJBVKKNB3UL5MRCAE/?format=api",
    "sender": {
        "address": "aa5jg (a) fidmail.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "John Geiger",
    "subject": "[amsat-bb] Re: 2 Meter TV Interference",
    "date": "2011-12-07T22:11:15Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/B7L64ORAI5U4YABAZK3ZDVTOUJDOPCID/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Rock Island, IL, where I used to live, still has a channel 4 on VHF channel \n4.\n\n73s John AA5JG\n\n----- Original Message ----- \nFrom: \"Charles Suprin\" <[email protected]>\nTo: \"Bob Bruninga\" <[email protected]>\nCc: <[email protected]>; \"Gordon JC Pearce\" <[email protected]>\nSent: Wednesday, December 07, 2011 9:48 PM\nSubject: [amsat-bb] Re: 2 Meter TV Interference\n\n\n>I didn't think there were any vhf stations left. All the numbers on the\n> channels now are virtual. All the tv antenna plans are for uhf bands. A\n> quick look in the Boston market and the lowest channel is 19, channel\n> 2@500MHz. Are there places that still use vhf?\n>\n> Charles\n> On Dec 7, 2011 1:38 PM, \"Bob Bruninga\" <[email protected]> wrote:\n>\n>> HPF above 500 MHz?  Then the TV would not be able to see anything but a \n>> few\n>> UHF channels.\n>>\n>> What is needed is a stub filter.  Just a piece of open ended coax 13\" \n>> long\n>> \"T\"ed into the antenna lead....\n>>\n>> The 13\" is about 66% of a quarter wave at 2 meters.\n>>\n>> Done\n>>\n>> Bob, WB4APR\n>>\n>> -----Original Message-----\n>> From: [email protected] [mailto:[email protected]] On\n>> Behalf Of Gordon JC Pearce\n>> Sent: Wednesday, December 07, 2011 3:02 AM\n>> To: [email protected]\n>> Subject: [amsat-bb] Re: 2 Meter TV Interference\n>>\n>> On Tue, 6 Dec 2011 21:17:55 -0600\n>> Wyatt Dirks <[email protected]> wrote:\n>>\n>>\n>> > Just recently I have been having troubles with a neighbor while I am\n>> working the FM satellites(SO-50 and AO-27). The setup I am currently \n>> using\n>> is my mobile setup because I am unable to put a base station up for many\n>> reasons. I am using a FT8900 with 50 watts out into a 1/4 wave or 1/2\n>> Larson\n>> mobile antenna.The 1/4 wave is mounted permanently via a hole in the roof\n>> of\n>> my truck an the 1/2 wave is mounted on a mount opposite the factory\n>> installed FM/AM radio whip. It doesn't seem to matter what antenna I use\n>> for\n>> the problem to occur. Then I use either the arrow antenna or my cju for \n>> the\n>> downlink.\n>>\n>> Use 5W into a hand-held Yagi.  You'll get far better results.\n>>\n>>\n>> > Today I had another local ham over at the request of the neighbor and \n>> > his\n>> mobile Kenwood radio did the same thing to the neighbors tv when he\n>> transmitted on 2 meter with 50 watts out. He also recommended that they \n>> get\n>> a filter. I did not see the specs on the filter nor do I know what\n>> bandwidth\n>> it was for.\n>>\n>> What you want is a highpass filter that will lop off everything below\n>> 500MHz.  The chances are that your TX output is clean enough but the \n>> little\n>> amplifier in the splitter for the TV is causing all sorts of intermod - \n>> and\n>> probably covers from broadcast VHF radio to the top of the TV band.\n>>\n>> --\n>> Gordon JC Pearce MM0YEQ <[email protected]>\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 \n>> program!\n>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\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 \n>> program!\n>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\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": []
}