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GET /hyperkitty/api/list/[email protected]/email/QTNFBC67X5DQXI34EOLA2HZNKEVAZEN6/?format=api
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/QTNFBC67X5DQXI34EOLA2HZNKEVAZEN6/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "QTNFBC67X5DQXI34EOLA2HZNKEVAZEN6", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/EDEJQ3GKTPCCDVEXEB7JUVXLDXRKTY2A/?format=api", "sender": { "address": "wao (a) vfr.net", "mailman_id": "9057def1436c407fa55c4988db05914a", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/9057def1436c407fa55c4988db05914a/emails/?format=api" }, "sender_name": "Joe Spier", "subject": "Re: [amsat-bb] Lindenblad or DCA???", "date": "2018-04-01T19:45:14Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/EDEJQ3GKTPCCDVEXEB7JUVXLDXRKTY2A/?format=api", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Hans,\n\nHere are links with antenna patterns for the DCA:\n\nhttps://drive.google.com/file/d/0B0Dkk87YYl-xX2gzLXk5MHZKVU0/view\n\nand the EZ-Lindenblad:\n\nhttp://www.amsat.org/wordpress/wp-content/uploads/2015/08/An-EZ-Lindenblad-Antenna-for-2-Meters2.pdf\n\nThe difference is in the lengths of the \"RG-59 (75ohm) phasing harness\" \nand dipoles to achieve a 50 ohm impedance at the required frequency.\n\nThe angle of the crossbooms affects the directivity of the antenna, in \nthe examples given, 60 degrees for a NOAA satellite in a geosynchronous \norbit and 30 degrees for a LEO orbit.\n\nThe only differences I see are the 50 ohm load feedpoint and the \nLindenblad dipoles are not exactly in the same plane as the DCA.\n\n-73, Joe Spier, K6WAO\nPresident, AMSAT\n\nOn 04/01/2018 06:28 AM, Hans (BX2ABT) wrote:\n> Double Cross Antenna (DCA)\n\n", "attachments": [] }