Doug, I worked for Sperry and other maritime electronics companies. Using a satellite tracking antenna on a boat needs to have a North input to have a relative tracking of an object-You can also have a heads up input. There are mobile antennas for the DISH network that can meet your needs, however, you must adapt the "North" input to the trackers. I'm sure you can modify the antenna to make it receive on the proper frequency you desire. They are not cheap, however, if you shop on e-bay, you may find one to fit your needs. Interface to say- PCSAT32 - may be unique. Good luck. 73, Dee, NB2F
-----Original Message----- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Doug Faunt N6TQS +1-510-655-8604 Sent: Thursday, January 05, 2012 1:39 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Re: Looking for a G3RUH dish Speaking of which, can any of the available amateur software packages handle a moving ground station? I'd like to be able to automate the antenna tracking on a boat. 73, doug On 05-Jan-12 05:55, Greg D. wrote: > > Hi Bob, > > I'm trying to visualize you driving (bouncing) down the freeway at 70 mph with a square yard of curved (airfoil!) metal sitting at odd angles to the air flow, trying to aim it at a target you may not be able to see clearly, which is also moving at some rate in another direction, with an accuracy of +/- a half dozen degrees (which is what you get with a dish that size). I had a hard enough time aiming my 30 inch BBQ grill at AO-40, from my nearly stationary house (this is California, after all), with up to date KEPS, a rotor system calibrated earlier against the position of the Sun, NBS-sync'd clock on a Linux PC, and so forth. > > Even if you mount the dish inside a camper minivan with a fiberglass roof (think mobile Radome), I don't see how this is going to work. I've seen you do amazing things, but what are you thinking? > > The best use of the dish would probably be to catch the balloon payload as it falls from the sky... > > Greg KO6TH > > >> From: bruni...@usna.edu >> To: k...@aol.com; amsat-bb@amsat.org >> Date: Wed, 4 Jan 2012 17:54:02 -0500 >> Subject: [amsat-bb] Re: Looking for a G3RUH dish >> >>> Regarding your Cu wire dish... you might look at the Tek Sharp >>> dishes as an easier alternative to "rolling your own." >> >> We are after absolute minimum wind drag. I don't think the Tek dish >> would survive accurate tracking while driving along the interstate at >> 70 PMPH to catch a balloon. And we want it to be a good 3' by 4' >> dish... Need the gain for the tiny wifi video link... >> >> Bob >> >> >> >> I picked one up on ebay about a year ago and put it in my attic... >> waiting for amsat-dl :-) >> >> http://www.plumdragon.com/teksharp/hr_AO-40_products.htm >> >> Drew, >> I have a spare PF dish about 60 cm, but it is steel, not aluminum >> like the G3RUH. I used it on AO-40 for 24 GHz. Let me know off-list if you want it. >> >> 73, >> Jerry, K5OE >> >> ---- previous message ---- >> You probably have one of the K5GNA "BBQ" dishes. The G3RUH is a solid >> round spun dish. >> >> 73, Drew >> >> -----Original Message----- >>> From: Bob Bruninga<bruni...@usna.edu> >>> Sent: Jan 3, 2012 2:19 PM >>> To: 'Andrew Glasbrenner'<glasbren...@mindspring.com>, 'amsat-bb' >>> <amsat-bb@amsat.org> >>> Subject: RE: [amsat-bb] Looking for a G3RUH dish >>> >>>> I'm looking for one of the 60cm G3RUH dishes >>> >>> Got one, (but not available). >>> >>> Questions: I measured reflector grid separation as .88 inches which >>> works out to be about 0.18 wavelength. I always thought the grid >>> had to be tighter than 0.1 inches to be an effective "surface". >>> >>> Maybe the difference with almost double the spacing is not that >> significant? >>> (especially for a steel one which would be quite heavy. >>> >>> Reason I am asking is that I also need another S band dish (at 70 >>> MPH on >> the >>> roof of a tracking van) and we are thinking about building one by >>> using an old solid 6' TVRO dish as a form and laying in copper wire >>> and soldering it to copper straps. With all that labor, I'd not >>> want to get the spacing wrong. >>> >>> Bob, Wb4APR >>> >> >> _______________________________________________ >> Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. >> Not an AMSAT-NA member? Join now to support the amateur satellite program! >> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb >> >> _______________________________________________ >> Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. >> Not an AMSAT-NA member? Join now to support the amateur satellite program! >> Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > > _______________________________________________ > Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb _______________________________________________ Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
