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GET /hyperkitty/api/list/[email protected]/email/JZAN7D5ZB576HVRRIF2E4FNYRTGWVPMG/?format=api
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/JZAN7D5ZB576HVRRIF2E4FNYRTGWVPMG/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "JZAN7D5ZB576HVRRIF2E4FNYRTGWVPMG", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/SQ6J7RJMROS2DPITWYBLIKMEZJD6FTDP/?format=api", "sender": { "address": "pe1rdw (a) amsat.org", "mailman_id": null, "emails": null }, "sender_name": "Andre", "subject": "[amsat-bb] Re: Circular polarization", "date": "2012-05-13T18:43:01Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/UMZL4XLFS5H2EM74FJSUNHOH4R3P5QSK/?format=api", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "On Sun, 13 May 2012 20:13:40 +0200, Bob- W7LRD <[email protected]> wrote:\n\n>\n>\n> Agreed... occasionally, sometimes left, right, vertical or horiz will be \n> best. Then is that for the up or downlink ? Essentially I have \n> discovered it is a crap shoot. Whatever works at any given moment may \n> not work (that well) a few minutes later. I believe Domenico had a \n> scheme for switching any of the four. These uncertainty's make it fun.\n>\n> still rebuilding all antennas\n>\n> 73 Bob W7LRD\n>\n> Seattle\n>\n>\n>\n> ----- Original Message -----\n>\n>\n> From: \" Ib Christoffersen \" <oz1my@ privat . dk >\n> To: \"David 4X1DG\" <4x1dg@ iarc .org>, amsat -bb@ amsat .org\n> Sent: Sunday, May 13, 2012 10:44:55 AM\n> Subject: [ amsat -bb] Re: Circular polarization\n>\n> Hi David,\n> The short answer is NO.\n>\n> But there are more to it than that :-)\n>\n> I think I still have an article about that if you are interested.\n>\n> 73 OZ1MY/ Ib\n>\n> ----- Oprindelig meddelelse -----\n> Fra : amsat -bb-bounces@ amsat .org [ mailto : amsat -bb-bounces@ amsat \n> .org] På vegne\n> af David 4X1DG\n> Sendt : 13 May 2012 18:31\n> Til: amsat -bb@ amsat .org\n> Emne : [ amsat -bb] Circular polarization\n>\n> Is a UHF circular polarization antenna needed for the current operational\n> satellites?\n> I am planning some work on my antenna system and wonder if the CP\n> is needed, or actually, deteriorate the signal by 3dB if the satellites \n> are\n> using linear antennae??\n>\nThe best option would probably be a rotatable antenna, a sat will never be \nfully horizontal vertical or circular, sometimes it even makes a \ndifference when you flip 180 degrees.\n\n-- \n73 Andre PE1RDW\n\n", "attachments": [] }