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GET /hyperkitty/api/list/[email protected]/email/5O4VFFVP46U62MITRGCFNXHJT4MBG2NK/
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/5O4VFFVP46U62MITRGCFNXHJT4MBG2NK/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "[email protected]", "message_id_hash": "5O4VFFVP46U62MITRGCFNXHJT4MBG2NK", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/5O4VFFVP46U62MITRGCFNXHJT4MBG2NK/", "sender": { "address": "k9qho67622 (a) comcast.net", "mailman_id": "cab44028cddd457daa837e6e209706c0", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/cab44028cddd457daa837e6e209706c0/emails/" }, "sender_name": "MICHAEL WILLIAMS", "subject": "Re: [amsat-bb] NASA Helical Antenna Question", "date": "2018-05-10T16:24:46Z", "parent": null, "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "John (vk2fak), \n\n\nYou said \"Is there any details on the web about this type of helix, have never seen\nit with a ring reflector in books.\"\n\n\nI've also never seen a helix ring reflector design in any antenna books. My first home brew helix followed AF9Y's design exactly from his site http://www.af9y.com/helix.htm which used a ring reflector. \n\n\nMy second build did not use PVC boom (too heavy) or copper tubing (too expensive) but a 1 in. square metal boom and aluminum clothes line wire. I kept the ring reflector.\n\n\nThis is the first time I've seen two reflectors used. It would be interesting to discover who NASA's supplier is for this antenna and see the spec's.\n\n\nRegards, Mike\n", "attachments": [] }