Jim, 41 to 50dB is great.
The height difference may be MSL to GPS height? Bye, Said Sent From iPhone > On Nov 24, 2014, at 18:39, Jim Sanford <wb4...@wb4gcs.org> wrote: > > Said: > > I'm seeing C/No numbers between 50.0 and 41.0 for the "green" birds. I'm > seeing 27.0 to 42 on the "blue" birds. Not quite sure what the difference > between green and blue is. UBlox is acting kind of funny -- it ignores any > attempt to click on an icon or any of the menu bar items. Yet it lets me > move the various windows around and resize them. A challenge for another > day. (Winders7) > > HDOP is 1.0, which wikipedia tells me is "ideal". PDOP is 1.9, still good, > but far from ideal. Reported position is very stable, converting altitude > (meters) to feet gets me 1158 feet, about 120 feet lower than what the GPS in > the car says my antenna should be at. (1250' at the drive way, plus 20 feet > of pole supporting the antenna.) > > Jim > >> On 11/24/2014 8:27 PM, Said Jackson wrote: >> Jim, >> >> Bobs suggestion is good; look at for example the LT3060 for something that >> needs less than 100mA. >> >> Glad your antenna is working well. What C/No numbers is uBlox indicating? >> >> Bye, >> Said >> >> Sent from my iPad >> >>> On Nov 24, 2014, at 16:28, Bob Camp <kb...@n1k.org> wrote: >>> >>> Hi >>> >>> The Linear LT1764 is a pretty good part. It’s nice and rugged / tough to >>> kill. Bypass the output with a few hundred uF of tantalum caps. Keep at >>> least a volt between input and output. >>> >>> Bob >>> >>>> On Nov 24, 2014, at 7:12 PM, Jim Sanford <wb4...@wb4gcs.org> wrote: >>>> >>>> Said: >>>> >>>> Several times you've mentioned a low noise LDO regulator. I've not seen a >>>> device specified -- can you share? >>>> >>>> Also, yesterday, in response to my question about using an existing >>>> antenna, you basically said, "Try it." Well, I did -- working great for >>>> over 24 hours. At this moment, I have good lock on 9 GPS birds and a >>>> "3d/gps" fix mode reported by U-center. Interestingly, there are a few >>>> GPS birds that show up as blue, even though they have the same C/N ratio >>>> as some green birds. One of them is at 89 degrees elevation -- no >>>> blockage like some to the west -- don't get that. >>>> >>>> Anyway, wanted to share that my existing antenna seems to be working fine! >>>> >>>> AND, my first 10 MHZ board arrived today . . . . >>>> >>>> Thanks, >>>> Jim >>>> wb4...@amsat.org >>>> >>>> >>>> --- >>>> This email has been checked for viruses by Avast antivirus software. >>>> http://www.avast.com >>>> >>>> _______________________________________________ >>>> time-nuts mailing list -- time-nuts@febo.com >>>> To unsubscribe, go to >>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>>> and follow the instructions there. > > > --- > This email has been checked for viruses by Avast antivirus software. > http://www.avast.com > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
