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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/OIC226SCAI4JAKVFJVIO23GXXCC53K3O/",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/",
    "message_id": "[email protected]",
    "message_id_hash": "OIC226SCAI4JAKVFJVIO23GXXCC53K3O",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/JP6GHTOQNQBFP66IWV2TTGUIC724PKDZ/",
    "sender": {
        "address": "w2ev (a) yahoo.com",
        "mailman_id": null,
        "emails": null
    },
    "sender_name": "Ev Tupis",
    "subject": "Re: [amsat-bb] request detailed system diagram for remoting a satellite station",
    "date": "2020-07-17T23:10:58Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/3P2QSVLRVVYXAR3DMY4KX3BV63MJZ27V/",
    "children": [],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "I echo your approach, Curt.\n\nI'm primarily a terrestrial narrowband operator.  No beams.  8x halos on 2 meters.  4x halos on 6 meters.  No rotators, no complexity.  However...I live in a rural area with very little band noise.\n\nMy suburban brothers need beams to null out broadband noise sources, birdies, etc.\n\nEv, W2EV\n\nOn Friday, July 17, 2020, 6:57:58 PM EDT, Curt Laumann via AMSAT-BB <[email protected]> wrote: \n\nHi Dave,\n\nWe have a similar situation at the University of Arizona: we are also\nmoving towards remote control.  Even before the campus virus shutdown\nelevated the priority of  remote operation, I concluded that a directional\nsatellite system is not optimal for K7UAZ -- given the consistent scarcity\nof volunteer labor available to maintain a directional antenna system.\nThis fall K7UAZ will be migrating to a set of omni, circularly polarized\nantennas with preamplifiers.  Not that controlling az/el rotors is overly\ncomplicated, but this change does help make remote operation even easier.\n\nRegards,\n\nCurt / K7ZOO\nK7UAZ Station Manager\n\nOn Fri, Jul 17, 2020 at 12:09 PM David J. Schmocker via AMSAT-BB <\[email protected]> wrote:\n\n> Hello,\n>\n> Does anyone have a detailed system diagram (or interconnect drawing)\n> showing how they have remoted a satellite station please?  Specifically\n> which parts of the system require IP-addressable power on/off, etc.\n>\n>\n> I am in the process of constructing a new satellite station for U/V\n> linear use at Milwaukee Area Technical College (where I teach).  Our\n> Data Communication and Networking class introduces satellite technology\n> which I plan to demonstrate live.\n>\n> Because the hours of access to the building are limited, and because we\n> teach Data Communication and Networking from two campuses (but have\n> Satellite station at only one), remoting this station would be desirable.\n>\n> I have an APC IP-addressable power strip (117vac) and some power relays\n> if we need 220vac switched, an IC-9700, two high-power switchable LNAs\n> (2m and 70cm), antennas (20 element RHCP for 2m and 16 Turn G3RUH Helix\n> for 70cm), and a Yaesu 5500 rotor with Green Heron Az/El controller\n> (I'll bring Heliax from home to get to the rooftop).  Hopefully our\n> city campus location is not overly noisy.      I plan to construct the\n> HEO-ready station as soon as I can be back on campus to do this.\n>\n> One specific area of concern: how to pass audio over internet. I've\n> heard Skype and some other vehicles have problematic latency but I have\n> yet to remote any station to use 'near real-time audio' for CW or SSB\n> QSOs so I lack experience with this.  The satellite computer\n> (controlling antennas and managing Doppler) is a Mac mini running\n> MacLoggerDX and MacDoppler software.\n>\n> If helpful, I have two surplus new Raspberry Pi 3s (new and unused) that\n> could be repurposed for part of this if helpful.\n>\n> You'll be happy to know I've been reading the mail and I know to first\n> listen and test so we Tx with minimum power.  But as a satellite newby,\n> I'm sure I'll need abundant guidance when we get QRV.\n>\n> Any detailed system diagrams (could be off-list directly to me) showing\n> how you built and configured such a remote station satellite system\n> would be greatly appreciated.\n>\n> Thank you\n>\n> very 73,\n>\n> Dave KJ9I\n> KD9BOG (at work)\n>\n> _______________________________________________\n> Sent via [email protected]. AMSAT-NA makes this open forum available\n> to all interested persons worldwide without requiring membership. Opinions\n> expressed\n> are solely those of the author, and do not reflect the official views of\n> AMSAT-NA.\n> Not an AMSAT-NA member? Join now to support the amateur satellite program!\n> Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb\n\n>\n_______________________________________________\nSent via [email protected]. AMSAT-NA makes this open forum available\nto all interested persons worldwide without requiring membership. Opinions expressed\nare solely those of the author, and do not reflect the official views of AMSAT-NA.\nNot an AMSAT-NA member? Join now to support the amateur satellite program!\nSubscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb\n",
    "attachments": []
}