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GET /hyperkitty/api/list/[email protected]/email/KWCDBQIKEJR2IV72GIHQ36CKPCZUC423/?format=api
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/KWCDBQIKEJR2IV72GIHQ36CKPCZUC423/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "KWCDBQIKEJR2IV72GIHQ36CKPCZUC423", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/JC22SYHGSQFT5FWGE3G3PUC57QBDXXKD/?format=api", "sender": { "address": "morsesat (a) optonline.net", "mailman_id": "72f51eafcada419487d1a984af73dff5", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/72f51eafcada419487d1a984af73dff5/emails/?format=api" }, "sender_name": "Dee", "subject": "[amsat-bb] Re: Looking for a G3RUH dish", "date": "2012-01-05T16:07:44Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/ZU5ZBINCYKTAAFV4IV2F72Z6PYAUPKA2/?format=api", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Doug,\nI worked for Sperry and other maritime electronics companies. Using a\nsatellite tracking antenna on a boat needs to have a North input to have\na relative tracking of an object-You can also have a heads up input.\nThere are mobile antennas for the DISH network that can meet your needs,\nhowever, you must adapt the \"North\" input to the trackers. I'm sure you\ncan modify the antenna to make it receive on the proper frequency you\ndesire. They are not cheap, however, if you shop on e-bay, you may find\none to fit your needs. Interface to say- PCSAT32 - may be unique.\nGood luck.\n73,\nDee, NB2F\n\n-----Original Message-----\nFrom: [email protected] [mailto:[email protected]] On\nBehalf Of Doug Faunt N6TQS +1-510-655-8604\nSent: Thursday, January 05, 2012 1:39 AM\nTo: [email protected]\nSubject: [amsat-bb] Re: Looking for a G3RUH dish\n\nSpeaking of which, can any of the available amateur software packages\nhandle a moving ground station? I'd like to be able to automate the\nantenna tracking on a boat.\n\n73, doug\n\n\nOn 05-Jan-12 05:55, Greg D. wrote:\n>\n> Hi Bob,\n>\n> I'm trying to visualize you driving (bouncing) down the freeway at 70\nmph with a square yard of curved (airfoil!) metal sitting at odd angles\nto the air flow, trying to aim it at a target you may not be able to see\nclearly, which is also moving at some rate in another direction, with an\naccuracy of +/- a half dozen degrees (which is what you get with a dish\nthat size). I had a hard enough time aiming my 30 inch BBQ grill at\nAO-40, from my nearly stationary house (this is California, after all),\nwith up to date KEPS, a rotor system calibrated earlier against the\nposition of the Sun, NBS-sync'd clock on a Linux PC, and so forth.\n>\n> Even if you mount the dish inside a camper minivan with a fiberglass\nroof (think mobile Radome), I don't see how this is going to work. I've\nseen you do amazing things, but what are you thinking?\n>\n> The best use of the dish would probably be to catch the balloon\npayload as it falls from the sky...\n>\n> Greg KO6TH\n>\n>\n>> From: [email protected]\n>> To: [email protected]; [email protected]\n>> Date: Wed, 4 Jan 2012 17:54:02 -0500\n>> Subject: [amsat-bb] Re: Looking for a G3RUH dish\n>>\n>>> Regarding your Cu wire dish... you might look at the Tek Sharp\n>>> dishes as an easier alternative to \"rolling your own.\"\n>>\n>> We are after absolute minimum wind drag. I don't think the Tek dish\n>> would survive accurate tracking while driving along the interstate at\n\n>> 70 PMPH to catch a balloon. And we want it to be a good 3' by 4'\n>> dish... Need the gain for the tiny wifi video link...\n>>\n>> Bob\n>>\n>>\n>>\n>> I picked one up on ebay about a year ago and put it in my attic...\n>> waiting for amsat-dl :-)\n>>\n>> http://www.plumdragon.com/teksharp/hr_AO-40_products.htm\n>>\n>> Drew,\n>> I have a spare PF dish about 60 cm, but it is steel, not aluminum\n>> like the G3RUH. I used it on AO-40 for 24 GHz. Let me know off-list\nif you want it.\n>>\n>> 73,\n>> Jerry, K5OE\n>>\n>> ---- previous message ----\n>> You probably have one of the K5GNA \"BBQ\" dishes. The G3RUH is a solid\n\n>> round spun dish.\n>>\n>> 73, Drew\n>>\n>> -----Original Message-----\n>>> From: Bob Bruninga<[email protected]>\n>>> Sent: Jan 3, 2012 2:19 PM\n>>> To: 'Andrew Glasbrenner'<[email protected]>, 'amsat-bb'\n>>> <[email protected]>\n>>> Subject: RE: [amsat-bb] Looking for a G3RUH dish\n>>>\n>>>> I'm looking for one of the 60cm G3RUH dishes\n>>>\n>>> Got one, (but not available).\n>>>\n>>> Questions: I measured reflector grid separation as .88 inches which\n\n>>> works out to be about 0.18 wavelength. I always thought the grid\n>>> had to be tighter than 0.1 inches to be an effective \"surface\".\n>>>\n>>> Maybe the difference with almost double the spacing is not that\n>> significant?\n>>> (especially for a steel one which would be quite heavy.\n>>>\n>>> Reason I am asking is that I also need another S band dish (at 70\n>>> MPH on\n>> the\n>>> roof of a tracking van) and we are thinking about building one by\n>>> using an old solid 6' TVRO dish as a form and laying in copper wire\n>>> and soldering it to copper straps. With all that labor, I'd not\n>>> want to get the spacing wrong.\n>>>\n>>> Bob, Wb4APR\n>>>\n>>\n>> _______________________________________________\n>> Sent via [email protected]. Opinions expressed are those of the\nauthor.\n>> Not an AMSAT-NA member? Join now to support the amateur satellite\nprogram!\n>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>>\n>> _______________________________________________\n>> Sent via [email protected]. Opinions expressed are those of the\nauthor.\n>> Not an AMSAT-NA member? Join now to support the amateur satellite\nprogram!\n>> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>\n> _______________________________________________\n> Sent via [email protected]. Opinions expressed are those of the\nauthor.\n> Not an AMSAT-NA member? Join now to support the amateur satellite\nprogram!\n> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n>\n_______________________________________________\nSent via [email protected]. Opinions expressed are those of the author.\nNot an AMSAT-NA member? Join now to support the amateur satellite\nprogram!\nSubscription settings: http://amsat.org/mailman/listinfo/amsat-bb\n\n\n", "attachments": [] }