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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/RB5V4DXPUFFYNAIQF5C42S5U4SR3DDFD/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "RB5V4DXPUFFYNAIQF5C42S5U4SR3DDFD",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/RB5V4DXPUFFYNAIQF5C42S5U4SR3DDFD/",
    "sender": {
        "address": "k6yk (a) juno.com",
        "mailman_id": "9dd495eb5a5b4400ad5e4ad998068d9f",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/9dd495eb5a5b4400ad5e4ad998068d9f/emails/"
    },
    "sender_name": "John W Lee",
    "subject": "[amsat-bb] Re: Eliminating Desensing",
    "date": "2008-06-30T18:15:46Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Something else to try, \nhook up the transmit side of the rig to a dummy load  \nand see how your receive is.  It may be  something in the \nrig causing it, not the proximity of the antennas. \n\nI get this problem sometimes and have other vhf/UHF antennas\nthat are maybe 50 feet away from the satellite antennas.  I can transmit\non an antenna 50 feet away and pointed away from the receive antenna\nand still get it sometimes. \n\n73,\nJohn K6YK\n\n\nOn Mon, 30 Jun 2008 13:22:09 -0400 (GMT-04:00) Andrew Glasbrenner\n<[email protected]> writes:\n> It's unusual to see desense on 2m receive from a 70cm uplink, but I \n> think the same solution can be applied. Many use a common 2m/70cm \n> diplexer as a high pass/low pass filter. In this case you would want \n> to feed the 2m antenna to the common port of the diplexer, and the \n> 2m port of the diplexer to the input of either your preamp or rig if \n> you do not have a preamp. This blocks your transmitted signal from \n> the receiver/preamp input very effectively. \n> http://www.amsat.org/amsat-new/articles/Mode-J/ describes this for \n> 70cm desense issues.\n> \n> Another option is to use a preamp with good filtering on the input. \n> I had issues with Mode J desense with my Icom AG-35 preamp, but have \n> none now that I have switched to SSB Electronics preamps.\n> \n> As always, Your Mileage May Vary (YMMV).\n> \n> 73, Drew KO4MA\n> \n> -----Original Message-----\n> >From: \"Reicher, James\" <[email protected]>\n> >Sent: Jun 30, 2008 12:50 PM\n> >To: [email protected]\n> >Subject: [amsat-bb]  Eliminating Desensing\n> >\n> >I got significant de-sensing of my 2 meter downlink from my 70cm \n> uplink at Field Day.  I know a good part of it was due to the short \n> cross-boom (about 4 feet) I was using.  I would like to decrease the \n> de-sense on this set-up before I permanently install it at my home \n> station.  Any and all suggestions are welcome.\n> >\n> >73 de W0HV, Jim in Raymore, MO \n> >Light travels faster than sound...  This is why some people appear \n> bright until you hear them speak.\n> >\n> >_______________________________________________\n> >Sent via [email protected]. Opinions expressed are those of the \n> 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> \n> \n> _______________________________________________\n> Sent via [email protected]. Opinions expressed are those of the \n> 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____________________________________________________________\nTurn your passion into a profession.  Click here to find a film school near you.\nhttp://thirdpartyoffers.juno.com/TGL2141/fc/Ioyw6i3l7QCi3mKYvxTfNWYZUdrpJ4HShB1AsDUM06qOO8RVY79JCN/\n",
    "attachments": []
}