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09-16-2015, 08:20 AM
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Join Date: Feb 2011
Location: USA
Posts: 3,179
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Quote:
Originally Posted by Bill Boyd
!Just hate to see it attached to RG-174 or similar with losses of 1dB/inch at 900MHz.
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stormy, I used one of the online "calculators" and came up with about "0.35 dB" loss at 978Mhz for 12 inches of RG-174. Did I make a mistake?
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09-16-2015, 11:42 PM
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Join Date: Jan 2005
Location: MN
Posts: 2,269
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J-Pole
Tested the Jpole vs the stock antenna tonight. Jpole pulls data from the 1 ground station from my back porch very well - the stock antenna did not at all. Looks to be promising for further development!
Screen cap video tells the story. Log files being analyzed.
__________________
Cheers,
Pete
Amateur Plane - RV-9A N789PH - 2350+ Hrs
Amateur Radio - KD0CVN
Doggies Delivered - 25+
St. Paul, MN
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09-17-2015, 04:00 PM
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Join Date: Jul 2015
Location: -
Posts: 12
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Quote:
Originally Posted by petehowell
Tested the Jpole vs the stock antenna tonight. Jpole pulls data from the 1 ground station from my back porch very well - the stock antenna did not at all. Looks to be promising for further development!
Screen cap video tells the story. Log files being analyzed.
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So cool. I'm going to give the J-pole a try! Thanks!
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09-17-2015, 04:10 PM
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Join Date: Sep 2006
Location: Landing field "12VA"
Posts: 1,530
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yeah, you did
Quote:
Originally Posted by humptybump
stormy, I used one of the online "calculators" and came up with about "0.35 dB" loss at 978Mhz for 12 inches of RG-174. Did I make a mistake?
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You missed my tongue-in-cheek. It's all good.
Point it, it works - and apparently, very well.
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09-19-2015, 10:38 AM
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Join Date: Mar 2010
Location: Raleigh, NC
Posts: 863
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Stratux and Fltplan on Nexus
During my flight testing with Stratux using Fltplan GO on an Android Nexus I was disappointed to discover that the GPS function did not work any longer. I have been using FLtplan GO as a backup of my Skyview and I program all my flights in Skyview and Fltplan GO. All other functions of Stratux (Weather and Traffic) are working but when ADS-B is on my map is no more moving on Nexus.
Here is what support at Fltplan answered on this matter:
"This is because Stratux does not have built in GPS and at this time our app does not support separate ADS-B and GPS receivers.
We will be making changes to the programming in the next couple weeks so that you can separate the two out. ".
It looks like Fltplan is going to do something about it soon. I hope so else it would be a big incentive to switch to another application on a different type of tablet.
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09-19-2015, 05:50 PM
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Join Date: Dec 2008
Location: Phoenix, Arizona
Posts: 285
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New beta version posted today..
Auto configure RY835AI GPS over serial port.
Added support for different GPS sentences.
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09-19-2015, 06:37 PM
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Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,297
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I want to upgrade to one of the new beta releases, but the notes indicate that the logging is turned on and will fill up the memory card with data. Does anyone know how to turn off the logging? There was mention of a console, but I have never used a console for this program. I burned it to the SD card and it self boots on the Raspberry. Also happy to lock the card or create a partition as they suggeted, but don't know how to do that.
Thanks for any help you can offer.
Larry
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09-19-2015, 09:47 PM
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Join Date: Mar 2012
Location: Saint Paul, MN
Posts: 157
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Hi Larry - I've been playing around some with the beta builds, both from the image and building from source. I'm not as proficient as the people doing the coding, but as far as I can tell, the only way to turn the logging on or off at this point is when the software is compiled. Even with the logging on, though, it would still take the stratux several hours to accumulate a log large enough to fill up the micro SD card.
If you are able to connect a console (like Terminal in OS X) to the RPi with an ethernet cable, you can try logging in with something like "ssh pi@192.168.2.2" (that's the default IP address, AFIK). The default password is raspberry. If you get logged in OK, you can try looking at the logs with "ls -al /var/log". You'd see a listing of the log files for the RPi, including a few for the stratux. You can try deleting the UAT log (the one that would grow the fastest with a single SDR antenna) with "sudo rm -f /var/log/stratux-uat.log". Then do "ls -al /var/log" to see if the UAT log has in fact gone away. You'd probably have to restart the Rpi to get stratux happily running and logging away again (restart it with "sudo shutdown -r 0"), but I'm not sure if it needs the restart.
As I said, I'm learning this as I go, so YMMV! I've started over from scratch on the SD card a few times while experimenting...!
__________________
Doug Dunston
Adopted RV-9A N191PF
Grateful VAF supporter 2020
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09-19-2015, 10:14 PM
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Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,297
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Quote:
Originally Posted by NM Doug
Hi Larry - I've been playing around some with the beta builds, both from the image and building from source. I'm not as proficient as the people doing the coding, but as far as I can tell, the only way to turn the logging on or off at this point is when the software is compiled. Even with the logging on, though, it would still take the stratux several hours to accumulate a log large enough to fill up the micro SD card.
If you are able to connect a console (like Terminal in OS X) to the RPi with an ethernet cable, you can try logging in with something like "ssh pi@192.168.2.2" (that's the default IP address, AFIK). The default password is raspberry. If you get logged in OK, you can try looking at the logs with "ls -al /var/log". You'd see a listing of the log files for the RPi, including a few for the stratux. You can try deleting the UAT log (the one that would grow the fastest with a single SDR antenna) with "sudo rm -f /var/log/stratux-uat.log". Then do "ls -al /var/log" to see if the UAT log has in fact gone away. You'd probably have to restart the Rpi to get stratux happily running and logging away again (restart it with "sudo shutdown -r 0"), but I'm not sure if it needs the restart.
As I said, I'm learning this as I go, so YMMV! I've started over from scratch on the SD card a few times while experimenting...!
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Thanks for the guidance Doug. I will try some of these suggestions. Do you know if the log deletes itself after shut down or will it keep collecting? If the latter, when the disk gets full, will Statux still run or does it need free space to do things? I don't get why the developers would turn this on, knowing that users will have to take proactive steps to keep the system running. That seems inconsistent with their philosophy on this project.
Larry
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09-19-2015, 11:08 PM
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Join Date: Jan 2005
Location: MN
Posts: 2,269
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Minne to Madison Antenna Comparison
Had 3 hrs in the plane today to do comparisons. The J-pole always picked up more ground stations and traffic than the ~3" stub antenna, but is harder to package in the plane. When you are are 4500 ft, they both work pretty well.
I'l continue to experiment.......
__________________
Cheers,
Pete
Amateur Plane - RV-9A N789PH - 2350+ Hrs
Amateur Radio - KD0CVN
Doggies Delivered - 25+
St. Paul, MN
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