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GET /hyperkitty/api/list/[email protected]/email/S4WDGIFW4PEZ2RVAQWCSWEO7LLUOZNY5/
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/S4WDGIFW4PEZ2RVAQWCSWEO7LLUOZNY5/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "[email protected]", "message_id_hash": "S4WDGIFW4PEZ2RVAQWCSWEO7LLUOZNY5", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/QY3X4GPMKOSWD4MX34UQK4Z3USDOC3KE/", "sender": { "address": "wb4gcs (a) amsat.org", "mailman_id": "87014499e012476c8198fad186f7f963", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/87014499e012476c8198fad186f7f963/emails/" }, "sender_name": "Jim Sanford", "subject": "[amsat-bb] Re: searching advice on low pass filter for 146 MHz", "date": "2011-04-27T21:53:13Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/QY3X4GPMKOSWD4MX34UQK4Z3USDOC3KE/", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Werner:\nI EMPHATICALLY agree with the advice to turn down the gain. Improving \nyour IMD will provide much more bang for the effort than trying to find \na filter with a loaded Q of over 100 at 2m.\n\nAn easy way (if imperfect) to get it \"right\" is to maximize the RF gain \nin the Icom radio and then adjust gain down until the preamp-on noise is \nonly SLIGHTLY higher than preamp off. This gets you enough gain to let \nthe preamp set system noise figure, although you still have a bit of excess.\n\nGood luck and please share your results!\n73,\nJim\[email protected]\n\n\nOn 4/27/2011 1:15 PM, Werner Kullmann, HB9BNK wrote:\n> What an amazing responsetime on this list !\n>\n> (post the question, go shopping, find valuable advice !)\n>\n> thank you all very much !\n>\n> It will be a few days, until I can get at the antenna. I will\n> report my findings here\n>\n> Thanks and\n>\n> 73 Werner, HB9BNK\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": [] }