Messages

1

OGN-R PilotAware / Re: P3i Antenna performance

« on: November 02, 2018, 08:11:26 pm »

Sorry - typo by me - I've just edited my post to correct it. I meant the collinear antenna as discussed earlier in the thread

2

OGN-R PilotAware / Re: P3i Antenna performance

« on: November 02, 2018, 06:09:52 pm »

Just wondering - does anyone know if are the P3I collinear antennas still available? I'm thinking about upgrading to something better than the stock P3I dipole to hopefully increase coverage for my station in Berwick upon Tweed.

3

OGN-R PilotAware / Re: Enabling bias tee option for FLARM reception

« on: July 03, 2018, 04:06:49 pm »

Managed to get this working - here is what I did for those who may be looking to do the same thing...

# put the disk in a writable mode, as Lee said
$ sudo /root/mount_rw.bash

# stop service
$ sudo service rtlsdr-ogn stop

# remove the current RTL SDR install
$ cd ~/rtl-sdr/build
$ sudo make uninstall
$ cd ~
$ sudo rm -R rtl-sdr

# install new drivers - instructions taken from the OGN google group
$ git clone https://github.com/rtlsdrblog/rtl-sdr
$ cd rtl-sdr
$ mkdir build
$ cd build
$ cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DINSTALL_UDEV_RULES=ON
$ make
$ sudo make install

# I ran into problems with a conflicting file so I renamed it to something else which fixed the problem
$ sudo mv /usr/lib/arm-linux-gnueabihf/librtlsdr.so.0 /usr/lib/arm-linux-gnueabihf/my_librtlsdr.so.0

Then I added BiasTee = 1; in the RF section of the OGN config file located at ~/rtlsdr-ogn/rtlsdr-ogn-paw.conf

# start service
$ sudo service rtlsdr-ogn start

# put the disk in a non-writable mode, as Lee said
$ sudo /root/mount_ro.bash

Then I confirmed the bias tee was working by measuring 4.5V on the SMA connector of the dongle

4

OGN-R PilotAware / Re: Enabling bias tee option for FLARM reception

« on: June 28, 2018, 05:50:22 pm »

I have found some instructions on the OGN wiki about enabling the bias tee, at the bottom of this page: http://wiki.glidernet.org/wiki:manual-installation-guide

It states that a custom driver is needed and the old one needs to be removed by doing
$ sudo apt-get remove --purge rtl-sdr
I have tried this but I get "Package 'rtl-sdr' is not installed, so not removed" which leads me to think that the rtl-sdr driver in the PilotAware image has compiled/installed in another way.

So firstly, does anyone know how to remove the already existing drivers before I can install the custom ones? I know that the already existing drivers don't support the bias tee option because doing
$ rtl_biast -b 1
to manually enable the bias tee until the next reboot will return "rtl_biast: command not found".

5

OGN-R PilotAware / Enabling bias tee option for FLARM reception

« on: June 28, 2018, 01:00:58 pm »

I have recently purchased an RTL-SDR blog V3 dongle as well as an Uputronics filtered preamp to improve my FLARM reception. The RTL SDR V3 dongle has a built in bias tee which can be used to power the Uputronics preamp - I believe it can be enabled via the pi. I see many people are using this setup, judging by the OGN google group. I am wondering how would I enable this bias tee option within the PilotAware image. I am running on a raspberry pi 2 and version 20180428.

6

OGN-R PilotAware / Re: Crimp tool

« on: April 24, 2018, 01:13:54 pm »

Hi all,

A long overdue update to this:
I decided to go with the maplins one a little while ago. So far I have only crimped one connector on and it seems to have worked fine.

Thanks everyone for the suggestions

7

OGN-R PilotAware / Crimp tool

« on: January 20, 2018, 10:14:53 pm »

Hi,

I am currently in the process of following the install instructions to create an antenna enclosure for the OGN-R station at Berwick-upon-Tweed, so the antenna can be mounted outside. I have a 10m length RG-8X coax cable and some SMA connectors. I am wondering if anyone could point me in the right direction as to where I can purchase an appropriate crimp tool to attach the SMA connectors to the ends of the RG-8X cable.

Thanks