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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/Y4MCTMBFMU3PCPFIH2PQ2DBF3YFWRANU/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "CACZz0S3yxnHa1zqrv2Jx+gPaVCy7YSLKR0taedzbnCVZjW-5Hg@mail.gmail.com",
    "message_id_hash": "Y4MCTMBFMU3PCPFIH2PQ2DBF3YFWRANU",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/3YFMJFGCIMUSERPV7L76ARFMLCSLDPOE/?format=api",
    "sender": {
        "address": "ks1g04 (a) gmail.com",
        "mailman_id": "30590cddbe684a52a5c3c945059cdd06",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/30590cddbe684a52a5c3c945059cdd06/emails/?format=api"
    },
    "sender_name": "Stephan Greene",
    "subject": "[amsat-bb] Re: [amsat-dc] Re: inquiry about homebrew az-el systems\t(Samudra Haque)",
    "date": "2013-02-26T01:47:14Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/3YFMJFGCIMUSERPV7L76ARFMLCSLDPOE/?format=api",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Two additional points, speaking as someone who's mechanical fabrication &\ncoding skills are equally lacking (downside of systems engineering is you\nunderstand the functional flows, associated diagrams, requirements\nboundaries, etc. quite well, but need a bit more than a book of \"the system\nshall...\" statements to accomplish anything!).\n\nThe WA5VJB \"Cheap Yagi\" designs are ridiculously easy to build [the most\ncomplex tool is a guide to keep a hand drill perpendicular if you lack a\ndrill press]; given the relatively lower gain required for LEO satellites,\nit would cheap & easy to build a higher-gain version of the Arrow (I am\n1/2-way there) or pairs of LHCP and RHCP antennas and switch to one or the\nother rather that at the phasing harness level.  They are not as-is rugged\nenough for permanent installation, but I think the design could be\nadapted.  There is a DK-something in Germany who has published a wealth of\nhigh-performance designs that are suitable for permanent installation if\nyou select the right components.   In emails with WA5VJB, he mentioned to\nme that the performance of the Arrow is very suboptimal.  That's one reason\nwhy smaller (fewer elements) designs often outperform the Arrow. [Not that\nI dislike the Arrow, I have one & it works.]  I think he's discussed this\nin CQ Magazine or CQ-VHF.\n\nIt is a tempting design project to acquire surplus drive motors and\nfabricate a mechanical system and remote/computer control (and I'm semi\nsurprised the VHF/UHF rover community hasn't done more with this), and it\nis something I'd like to do myself; I'll note however that the Yaesu az/el\nrotor controller draws very little power - a small inverter was sufficient\nto run mine for Field Day last year.  Further, Bob Brunginga (WA4APR) has\nnoted that an azimuth-only station can be quite sufficient for at least\ngetting started with LEO satellites.  Something to keep in mind, depending\nwhere the resource budget falls in terms of manpower vs. money.\nHistorically, AMSAT has opted for the people time are cheaper than dollars.\n\nI look forward to seeing what you find out, Samudra, and hope you are able\nto attend the DC portable satellite meeting the end of March.\n\n73\nSteve KS1G\n\n-- \n-----------------------------------------------------------------------------------------------------------------\nSteve Greene  [email protected]  <kay ess one gee zero four>@gmail.com\n-----------------------------------------------------------------------------------------------------------------\n",
    "attachments": []
}