[amsat-bb] Re: usb to serial adapter woes
Problem reported in this thread solved. Bought and installed two optical isolators. One in ICOM serial line and one in GS232/G5500 serial line. Rotor position now reading correctly, but there was one more issue. Cables that I believed to be straight through were not; they were null modem. Should have used an ohm meter right away. Tests of pins 2 and 3 at both ends proved what the cables really were. A warning: two null modem cables back-to-back to not make a straight through cable. But there still are more problems with my sat system, which I will discuss in further posts. Larry W7IN On 4/15/2010 6:41 PM, Larry Gerhardstein wrote: > Jim, et. al., Thanks for the advice. However, after installing the > USA-49WG and driver install for Windows 7 with help from Tripp Lite > technical support, my system still does the same thing. I plug the > serial cables to both rotor and transceiver digital interfaces and then > to the 49WG and the same thing happens. Azimuth meter drops to zero and > there is no control. Further it is now working worse than before, as I > have neither control of rotor or transceiver. If measure the voltage > between metal shields of the two cables, there is about 2 volts there. > It sure looks like a ground loop, but where and how. I have no idea at > this point. In 56 years a ham operator, I've never run into anything > like this. Maybe RS232 isolators would fix this??? Seems like overkill. > > Larry W7IN > ___ Sent via amsat...@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
[amsat-bb] Re: SatPC32 and SDX won't talk
I applied the suggested fix to get the Speech SDX. That worked, but on the computer in question, I do not have sound coming from my speakers. I'm working with the vendor on that. But there are more troubles with my set setup and I will detail those in separate postings. Larry W7IN -- Hello Larry, >> I suppose you run V. 12.8 or 12.8a. >> >>> From the list in menu "Rotor Setup" choose the item "Yaesu GS-232". >>> Save the >>> >> change with the upper "Save" button and restart SatPC32. >> >> ___ Sent via amsat...@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
[amsat-bb] Re: Space Debris:
Stephen Melachrinos wrote: > were a major hazard to everyone, themselves included. So they must > have allocated more resources to the problem, as this is a massive > undertaking. (Note that some reports say that the US has about 20,000 > objects that are tracked and cataloged. In theory, this means > propagating the ephemeris of all of these for some number of days and > comparing all possible combinations across the ti! me period of the > analysis.) Computers are cheap, so actually propagating the ephemerides of those objects is the easy part. The hard part is that the published elements are simply not accurate enough to reliably predict collisions -- or give sufficient reassurances that a collision won't occur. TS Kelso has written some stuff about this on his website. See http://www.celestrak.com/events/collision/ He's been doing his own conflict predicts for some time. He shows many close approaches that never result in a collision. Yet he did not rate a Iridium 33/Cosmos 2251 collision as especially probable before it happened because the TLE numbers simply aren't accurate enough. ___ Sent via amsat...@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
[amsat-bb] Re: Galaxis Space Scanner ACU
Hi! > I did find this in archives and the website for Gary > (Gary Gonnella W6RYO http://www.w6ryo.com) is no good > and Google no help in finding a mirrored site. Google may not be any help, but the Internet Archive's Wayback Machine appears to have many copies of that web site over several years: http://web.archive.org/web/*/http://www.w6ryo.com 73! Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ ___ Sent via amsat...@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
[amsat-bb] Re: Galaxis Space Scanner ACU
I did find this in archives and the website for Gary (Gary Gonnella W6RYO http://www.w6ryo.com) is no good and Google no help in finding a mirrored site. On 4/28/2010 12:09 AM, kq...@verizon.net wrote: > Search the archives. > http://www.amsat.org/amsat/archive/amsat-bb/200409/msg00443.html > 73, Jim KQ6EA > > > > On Apr 28, 2010, *Joe Leikhim* wrote: > > I have found a number of the model Galaxis Space Scanner ACU > Labeled as > being made by FutureTrak Intl, and having Lockheed-Martin > manufacturer > labels. These were apparently made for tracking DBS satellites from > yachts and RV's. > > I saw a post a while back about a website on using these for Ham > Sats. > Does such information still exist? > > -- > Joe Leikhim > > Leikhim and Associates > Communications Consultants > Oviedo, Florida > > www.Leikhim.com > > jleik...@leikhim.com > > 407-982-0446 > > ___ > Sent via amsat...@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 > -- Joe Leikhim Leikhim and Associates Communications Consultants Oviedo, Florida www.Leikhim.com jleik...@leikhim.com 407-982-0446 ___ Sent via amsat...@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
[amsat-bb] Re: AO-51 Telemetry Software - TLmEcho
Hi Bruce, I have a simpler three step process outlined on my personal webpage AND a newer version of the software that doesn't seem to be listed on the link below: Scroll to the bottom of this page: http://sites.google.com/site/marklhammond/hamradio 73, Mark N8MH On Thu, Apr 29, 2010 at 6:43 AM, Bruce Semple wrote: > > Looks like Mike Kingery (KE4AZN) wrote TLmEcho back in July 2004 -- > But for those of us getting back into the hobby .. it's new to us! > > It does a nice job visualizing the various measurements collected in the > telemetry stream > > Great job Mike! > > http://www.amsat.org/amsat-new/echo/tlm_decode.php > > > > ___ > Sent via amsat...@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 > > -- Mark L. Hammond [N8MH] ___ Sent via amsat...@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
[amsat-bb] AO-51 Telemetry Software - TLmEcho
Looks like Mike Kingery (KE4AZN) wrote TLmEcho back in July 2004 -- But for those of us getting back into the hobby .. it's new to us! It does a nice job visualizing the various measurements collected in the telemetry stream Great job Mike! http://www.amsat.org/amsat-new/echo/tlm_decode.php ___ Sent via amsat...@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
[amsat-bb] KiwiSat video
New KiwiSat video http://www.southgatearc.org/news/april2010/kiwisat_video.htm Violet Amateur Radio satellite http://www.southgatearc.org/news/april2010/violet.htm FUNcube FlatSat Meeting http://www.southgatearc.org/news/april2010/funcube_flatsat_meeting.htm AMSAT-UK International Colloquium July 31 - Aug 1 http://www.uk.amsat.org/colloquium/ 73 Trevor M5AKA Daily Amateur Radio Email/RSS News: http://www.southgatearc.org/ Email Your News To: editor at southgatearc.org Or Upload Using Form At: http://www.southgatearc.org/news/your_news_1.htm ___ Sent via amsat...@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
[amsat-bb] Re: Rooftop Antenna Labs?
At 04:49 PM 4/28/2010, Franklin Antonio wrote: >At 05:25 PM 4/28/2010, Robert Bruninga wrote: > >I may have an opportunity to begin planning for a major building > >upgrade at my school and want to propose a modern root-top > >antenna lab. > >Most antenna test labs now use anechoic chambers rather than rooftops. >. >___ >Sent via amsat...@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 In 1966 I started my career as an R&D technician (took a leave from school for a couple years). We built asw weapons (i.e. sonobuoys) in an old brick three story factory with a flat roof. They test dropped the buoys over the side of the building 30-feet into a large vat of water, but the roof was the antenna test range. There I ran tests on VHF antennas. Not a very sophisticated range but definitely "hands on", real RF, real measurements. An engineers calculator was a slide rule, no computers then; fancy computer simulation was unknown. Mostly, I did troubleshooting of the engineering prototypes and finding fixes. Those went back to the engineers to fine tune their design. I quit that and returned to college in summer 1968 and landed a job with Hughes Aircraft in CA. 1971 found me working at Goldstone at the Microwave Test Facility also known as the "antenna range". The rest they say is history. 73, Ed ___ Sent via amsat...@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
