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{
    "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/47DPJJYESNC7JQU2PE5XR3VTYX6MJPBS/?format=api",
    "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api",
    "message_id": "[email protected]",
    "message_id_hash": "47DPJJYESNC7JQU2PE5XR3VTYX6MJPBS",
    "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/K746F5JRXVIZQCXVE637KQZB6T4XJOG7/?format=api",
    "sender": {
        "address": "robert.machale (a) yahoo.com",
        "mailman_id": "46e6b85af97e4043be040e7aded959ab",
        "emails": "https://mailman.amsat.org/hyperkitty/api/sender/46e6b85af97e4043be040e7aded959ab/emails/?format=api"
    },
    "sender_name": "Robert MacHale",
    "subject": "Re: [amsat-bb] Space Center Abandoned Dish Rehabilitation\t-\tOutreach #1",
    "date": "2019-08-14T22:19:25Z",
    "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/H7YRJ45NWSWQCB4OFRD64TPAVSLMGIBS/?format=api",
    "children": [
        "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/UEH3XAJ5LBRVIFOGBPFBQWHIRKTYJ6PZ/?format=api"
    ],
    "votes": {
        "likes": 0,
        "dislikes": 0,
        "status": "neutral"
    },
    "content": "Wow! Fun project. Very exciting.\nAny chance there are also antique antennas at the California ground station at Goldstone. Nasa had three primary ground stations for Apollo: Spain, Australia, and California.\nhttps://www.gdscc.nasa.gov/ \n\n73\nRobert MacHale. KE6BLR Ham Radio License. http://spaceCommunicator.club/aprs \n. Supporting Boy Scout Merit Badges in Radio, Robotics, and Space Exploration\n\n \n\n    On Wednesday, August 14, 2019, 2:54:16 PM PDT, Daniel Cussen via AMSAT-BB <[email protected]> wrote:  \n \n I would recommend trying to find out if the motors are AC or DC or some\nweird voltage or stepper or servo type. If you can get the motors to move,\nposition feedback could be added with a simple potentiometer from a belt,\nor a fancy encoder. It may be possible to use the old position feedback,\nbut it may be faster and easier to mount something on the outside that\ngives the same result.\n\nIn terms of frequency ranges,  rate of tracking, dish beam width, these\nwill determine what it could be used for, and assuming you use the old\nmotors and the reflector on the dish is designed for vhf?, then this would\nlimit top frequency and maximum tracking ability aligned with beam width.\nSay vhf, UHF lower microwave, and presumably the dish could track low earth\norbit or moon bounce.\n\nLooking at the photos it looks like the right middle connector is an n type\ncoax connector for the feed. I assume the military type connectors are for\nposition feedback from some sort of rotary or absolute encoder. Often there\nis an encoder mounted near or on the motor, which is AC or DC simple motor.\n\nIf the manual movement cranks work you could run belts to them and mount\nnew motors on the outside. Speed might be limited, but acceptable.\n\nI would recommend adding hardware limit switches no matter what you do to\nensure the dish can never rotate too far and damage itself. It may have\nlimit switches inside, but they may need replacing and external switches\nwould be easier to service.\n\nIt would be great if this could track low earth orbit and receive school\ncontacts from the iss and cubesats on vhf and UHF.\n\nI would like to see it receive 2395MHz Hamtv from the ISS, which is\nrelatively strong and easy to receive.\n\n\nOn Wed, 14 Aug 2019 22:11 Michelle Thompson via AMSAT-BB <[email protected]\nwrote:\n\n> A group of GNU Radio community members has permission to evaluate a dish\n> installation in Huntsville, AL near the Space Center. If you've ever been\n> to the Space Center (where the Saturn V is suspended from the ceiling) then\n> this dish is right outside the main entrance. Anyone attending Symposium\n> last year should recognize it!\n>\n> Here's a set of photos:\n>\n>\n> https://drive.google.com/drive/u/0/folders/1d_Oi3hrIi49JxmaoNuUA-pvUXOs7vSz1\n>\n> We're looking for technical information, identification of what you\n> recognize in the photos, recommended next steps, and what to watch out for,\n> prioritize, or avoid. We already know we want to take the paint off all the\n> ID plates and see what's under there.\n>\n> We want to see if we can get this working for *amateur radio operators to\n> access over the internet*, ideally with a GNU Radio flowgraph to control it\n> from an SDR. Our priority is to make this work for amateur satellite.\n>\n> This type of setup is similar to what GNU Radio Foundation is working on\n> with the Allen Telescope Array. We have the go-ahead from the Space Center\n> curator to do this study and make recommendations.\n>\n> I have fully restored several basket-case British sports cars and then\n> successfully raced them. My other team members have restored things even\n> more challenging. We are not dumb, naive, or easily deterred. We know this\n> may turn out to be something that requires way more work than we can do in\n> any time frame we can manage. Documenting that is still of great value, and\n> that is why we are asking for your help. Right now, no one knows much of\n> anything about it. This sort of installation, if available for amateur\n> radio, is well worth the effort.\n>\n> Some of the people involved have been driving past this installation for 20\n> years and want to see it back in service at whatever level we can achieve.\n> It will be discussed at GNU Radio Conference, and everyone at the\n> conference will have the opportunity to see it up close and in person,\n> since it's literally across the parking lot from the venue.\n>\n> Want to attend or find out more about GRCon?\n> https://www.gnuradio.org/grcon/grcon19/\n>\n> If you know of someone off-list that might know details that will help,\n> then please pass this along!\n>\n> -Michelle W5NYV + Corps of Operation Flashlight\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_______________________________________________\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  \n",
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