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GET /hyperkitty/api/list/[email protected]/email/POAQLW77555LXUPPN6XW3CREOZRFCVSU/
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/POAQLW77555LXUPPN6XW3CREOZRFCVSU/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "[email protected]", "message_id_hash": "POAQLW77555LXUPPN6XW3CREOZRFCVSU", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/POAQLW77555LXUPPN6XW3CREOZRFCVSU/", "sender": { "address": "pa3guo (a) upcmail.nl", "mailman_id": null, "emails": null }, "sender_name": "PA3GUO", "subject": "[amsat-bb] Re: How to get started on SSB birds (antennas)", "date": "2011-06-27T21:52:42Z", "parent": null, "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "> My preference is to build something \n\nHi Jeremy !\n\nYesterday I finished constructing my new antenna for 70cm, a 16 elements DK7ZB. \n \nMy Requirements: \n- Needs to work for EME at 432 MHz (15.5 dBd / 16 elements has been used \nsuccessfully by others) \n- Needs to work for satellite communication (needs to elevate up to 90 degrees: \ncan not be longer as 4 meter) \n- Avoid complex circular polarization this time (linear polarization had proven \nto work fine for Cubesats) \n \nSelected design: \n- 16 elements DK7ZB \n- 15.5 dBd \n- length 3.86 meter \n \nResults: \n- Fantastic ! \n- Compared to the 12 elements beam I can decode Cubesats (FO-69, O/OREOS) now \nmuch earlier \n- Decoding (not hearing!) FO-69 improved from 5..7 degrees elevation to 2..3 \ndegrees \n- Have not done any EME tests yet \n \nHere are the photo's: \nhttp://www.pa3guo.com/dk7zb_70cm.html \n\nBtw: not sure if building is actually cheaper as buying: this antenna costed me ~90$\n(but it is more fun !)\n\n--\nHenk, PA3GUO\n", "attachments": [] }