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GET /hyperkitty/api/list/[email protected]/email/6QZRRHG76GKNSB3Z3CZYURBGPGVVWH6K/
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/6QZRRHG76GKNSB3Z3CZYURBGPGVVWH6K/", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/", "message_id": "CAJUhCTOhfiJvR-Gzg88WE=v7EDS=EdB9hUqngwazYDzWYTfEGA@mail.gmail.com", "message_id_hash": "6QZRRHG76GKNSB3Z3CZYURBGPGVVWH6K", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/6QZRRHG76GKNSB3Z3CZYURBGPGVVWH6K/", "sender": { "address": "normanlizeth (a) gmail.com", "mailman_id": null, "emails": null }, "sender_name": "Lizeth Norman", "subject": "[amsat-bb] decoding Niwaka", "date": "2012-12-21T05:37:04Z", "parent": null, "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Hi all!\nIn the process of rehabbing a dish and building a feedhorn for the\nspace segment at 5.8 GHz. Choosing a radio and a conversion scheme\nthat is both economical in the short term and with the ability to\nreuse the radio at a later date has been an interesting journey.\n\nThe radio that I've found is the ADF 7020 development board. There are\nseveral flavors of daughter cards for different licensed or ISM bands.\n The particular flavor I'm considering using is the licensed band\n(ham!) uhf radios (432).\n\nRather than reprint the data sheet, feel free to make google your\nfriend! Short synopsis is that it natively supports what looks like\nmore than a few common modes of demodulation for the type of data as\nwell as data rates compatible with satellite data downlinks.\nAdditionally, there is the capability to slew the frequency via\nelectronic frequency control OR via data in. Smells like an\napplication of an arduino playing DTE for an RS 232 connection. The\narduino can be driven by data from the dde interface from either\nOrbitron or Satpc32!\n\nFrequency conversion scheme will use a mixer and yig with a\nsynthesizer. This sounds like a difficult approach. Most of the heavy\nlifting has been done by John Miles ke5fx. Driving the yig is quite\nstraight forward using either a parallel port or Arduino or such.\n\nMixer is a Hittite microwave dev board bought for 16 bux shipped on\nepay. This is flat out the tiniest thing I've ever worked on. Pictures\nto come!! Watch my flickr page.\n\nThe mixer should support both the data radio and a funcube dongle via\na mini circuits power divider.\n\nThe key is most of this gear is capable of being repurpoused to\nAlexander, Graham and Bell when they're deployed.\n\nSorry as I've left out more than I've included, I'm afraid.\n73 de Norm n3ykf\n", "attachments": [] }