Email Detail
Show an email
GET /hyperkitty/api/list/[email protected]/email/H65D4JIKI67MRZRW357TMEADGFQHVC4G/
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/H65D4JIKI67MRZRW357TMEADGFQHVC4G/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "CAJNyT09fTEFh+pj6Z4KTUXSkYjhn=3env0WLGoG6FVgJZ4aFJQ@mail.gmail.com", "message_id_hash": "H65D4JIKI67MRZRW357TMEADGFQHVC4G", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/H65D4JIKI67MRZRW357TMEADGFQHVC4G/", "sender": { "address": "electricity440 (a) gmail.com", "mailman_id": "ef87c2cb0fde4895acc95c1124b6a491", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/ef87c2cb0fde4895acc95c1124b6a491/emails/" }, "sender_name": "Skyler F", "subject": "[amsat-bb] High Altitude Balloon micro battery reccomendation", "date": "2016-12-27T04:20:30Z", "parent": null, "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "I am going to send up a few micro beacons (milliwatt HF CW transmitters)\nprobably using Walmart balloons and thin wire as the active antenna/payload\nstring.\n\nThe CW beacon RF module is a really simple oscillator that drifts a certain\namount with temperature - that way I can tell how cold it is based on the\nreceived frequency from on the ground. An ATtiny or something similar will\nprobably be used to keep the beacon legal and send out CW every 10 mins to\nbreak the carrier.\n\nSo the whole RF module and beacon is extremely light, basic\ntransistor/crystal oscillator + ID chip so I don't have to worry about\nrecovery. The only consideration is the battery. I will probably have\nsomething operational between 3 and 7 volts, so I am thinking about just\nstringing a few watch batteries together. Is there a certain recommendation\nfor low temperature operation miniature batteries? I need to make this\npayload as light as possible.\n\nThe goal is the cheapest Amateur Radio balloon project where recovery is\nnot a worry. Signal strength reports across the country as well as wind\npredictions can get a good idea of where the balloon travelled. I can then\nmatch this data up with the daily National Weather Service launch data to\ndetermine how high my balloon went based on temperature.\n\n\n73\nSkyler KD0WHB\n", "attachments": [] }