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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/O4NLP6BGUJXC2UB55VRBIZBC2KMI4RWE/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "O4NLP6BGUJXC2UB55VRBIZBC2KMI4RWE",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/O4NLP6BGUJXC2UB55VRBIZBC2KMI4RWE/",
    "sender": {
        "address": "t.gentry (a) verizon.net",
        "mailman_id": "4fa600ccb3514231b8a694781206abd8",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/4fa600ccb3514231b8a694781206abd8/emails/"
    },
    "sender_name": "Tom Gentry",
    "subject": "[amsat-bb] Re: AMSAT-BB Digest, Vol 7, Issue 346",
    "date": "2012-10-18T17:50:22Z",
    "parent": null,
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Rubbish! I built my own antennae from wood and welding rod, cut my own \nphasing lines and built a computer from scraps to run the tracker \nsoftware.  I did have an AZ-EL motor set from the 80s but it had to have \nthe controller rebuilt and the case crack repaired.  My old radio FT726 \ndoesn't have computer control so I am building a softrock SDR station \nwith transverters for 2m and 70cm and my goal is to have it track and \nadjust for doppler while I make contacts whilst I am busy during a 7-10 \nmin LEO pass.\n\nSo far I have learned about Yagi antenna design, transmission line \ntheory and practice, Smith charts (impedance and admittance), software \ndefined radio theory, full duplex SDR radios and multi-user \ntransponders, so if that's what you call throwing technology at the \nproblem then color me guilty\n\nand PO.d at your comment.\n\n73,\n\nTom K5VOU\n\nOn 10/18/2012 10:00 AM, [email protected] wrote:\n> Message: 2\n> Date: Wed, 17 Oct 2012 22:38:36 +0100\n> From: Gordon JC Pearce<[email protected]>\n> To:[email protected]\n> Subject: [amsat-bb] Re: OH2AUE P3E transponder demo video\n> Message-ID:<[email protected]>\n> Content-Type: text/plain; charset=ISO-8859-1; format=flowed\n<snip> In any case, the challenge has changed. I don't see any real \nchallenge in the \"hard sats\", because the \"hard sat\" brigade all seem to \nuse massive aerial arrays, with computer-controlled steering and tuning. \nI don't see what's \"hard\" about it - it's just throwing technology and \nno real skill at the problem. Once you've figured out the mysteries of \nthe crappy proprietary software that people use to steer the aerials and \ntune the rig, it's point-and-shoot. The FM sats can be worked with \nsomething as simple as a dual-band handie and a homebrew crossband pair \nof Yagis - and a great deal of operator skill. No, the challenge today \nis this - are you ready? The challenge is: Get something flying, for \nless than the GDP of a small nation. There, I've said it. It's down to \nmoney. You know what else I'm going to say? There is almost certainly \nnever going to be another amateur HEO satellite. There, I've said \n*that*, too. Want to know why? Because we're a tightfisted bunch and \nno-one is going to fly us for very nearly free. The HEO crowd have some \namazing technology, but it's going to cost a fortune - a very large \nfortune - to fly these Death Star-sized satellites *at all*, never mind \ninto HEO. The future is small satellites, where we will have to cram as \nmuch radio into a tiny cubesat payload as we can. Even then it's going \nto be expensive, so we're going to need to look at countries that are \ndeveloping their space programme to get launches - and that's going to \nbe India, Pakistan, Iran if they get their shit together, maybe Israel \nif we can get them interested in anything other than \"observation\" \nsatellites and probably one or two others. Maybe some wealthyish African \ncountries will get in on it, like the DRC or Kenya. We're going to have \nto try coming up with clever satellites, rather than flying a bent-pipe \nbox the size of a fridge. No-one is going to want to lift that, without \nus paying full price.\n> -- Gordon JC Pearce MM0YEQ\n\n",
    "attachments": []
}