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GET /hyperkitty/api/list/[email protected]/email/VNQV3B5PKEZC7OTDLCVKESWSQ3PDZH7A/?format=api
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/VNQV3B5PKEZC7OTDLCVKESWSQ3PDZH7A/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "VNQV3B5PKEZC7OTDLCVKESWSQ3PDZH7A", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/VNQV3B5PKEZC7OTDLCVKESWSQ3PDZH7A/?format=api", "sender": { "address": "clintbrad4d (a) earthlink.net", "mailman_id": "34e9746137e540a4914cb0d9e0db52fd", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/34e9746137e540a4914cb0d9e0db52fd/emails/?format=api" }, "sender_name": "Clint Bradford", "subject": "[amsat-bb] Re: Polarity questions", "date": "2008-09-19T19:18:56Z", "parent": null, "children": [ "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/B4GNDF6W2FB4NEUPWWM3BS72LLRLJKZP/?format=api" ], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": " >>...20-dB, assuming the signal is pure circular \npolarization...linear, then -3 dB...difference between RHCP and LHCP \nis 20 dB...difference between Horizontal and Vertical Linear is 20 \ndB...difference between (RHCP or LHCP) and (Horizontal or Vertical) is \n3 dB...the VHF/UHF Manual handbook says 20 -30dB...in the real world, \nexpect around 20~25dB loss from being completely cross- \npolarized...Between linear and circular, expect about 3dB loss...\n\nAhh, thank goodness for the engineers...\n\nJust know that to get started working the FM satellites, you do not \nneed to spend much to make successful contacts...Working AO-51 from \nSouthern California (which some claim is not a \"real world\") at a Watt \nor so with an HT and Arrow Antenna is a breeze, and the polarization \nof the Yagi makes no difference in quality of TX/RX signal.\n\nAnd as you refine your satellite comms requirements, you can spend \nmore money!\n\nClint Bradford, K6LCS\n909-241-7666\n", "attachments": [] }