Airmail and SCS DR-7800 modem on linux and windows7

While planning the passage over the Pacific in 2016 i ordered a HF pactor-4 modem  in order to have backup communication in case of Inmarsat phone failure.

I discovered, the clients for WL2K are only available for Windows platform. I only use linux and especialy in low power environment, the efficiency of linux box is much higher than windows. I wanted to install full setup on toshiba NB550d laptop, since it works perfectly and can run for more than 8 hours without recharging.

I got one from ebay for abt 150€ with windows7 installed on SSD. Now to the plan:

- install the software on windows and make the setup work

- install lubuntu along windows

- install airmail in linux under wine

- link the linux installations data files to windows

- fake the com port in linux to use the same one



APM Planner 2.0 on Ubuntu 14.04 LTS

When installing the APM Planner from repository (prebuilt package did not work for me due to missing dependency),

Unpacking apmplanner2 (2.0.14) ...
dpkg: dependency problems prevent configuration of apmplanner2:
 apmplanner2 depends on libopenscenegraph80; however:
  Package libopenscenegraph80 is not installed.

i pulled sources from repo and tried to build it on my own, so i came across the other - Qt problem. Sources seem to be written for earlier version of Qt then i had ( Qt version 5.2.1 ) an issue with compilation of sources i got from git repo: 

git clone

qmake, make

i got series of errors:

build-release/ui/ui_mapripform.h:13:25: fatal error: QtGui/QAction: No such file or directory  #include <QtGui/QAction>

I googled a bit and found a reason, and simply modified sources with two find&replace commands:

grep -rl 'QtGui' build-release/ui/*.h | xargs sed -i 's/QtGui\///g'
grep -rl ', QApplication::UnicodeUTF8' build-release/ui/*.h | xargs sed -i 's/, QApplication::UnicodeUTF8//g'

this changes include files location in header files and removes no  more used argument from the function.

After this, cleaninng and building again APM Planner seams to work.






SIDI tips

1. Software installation

install software:


get sources from : git clone This email address is being protected from spambots. You need JavaScript enabled to view it.:/home/git/projects.git

install libusb:

sudo apt-get install libusb-1.0-0-dev


Create a file z70_usbfx2.rules in /etc/udev/rules.d with the following content:

# USBFX2 device udev rules which do the following:
# * allow access for users in group "plugdev"
# * unbind the FX2 peripheral from usbtest driver
# 10-2010 by Vesa Solonen. Tested on plain CY7C68013A on Ubuntu 10.04.
# Device properties can be found via dmesg (driver and device number) and udevadm info:
# udevadm info -a -p /sys/bus/usb/drivers/usbtest/1-3\:1.0
# Reference:
SUBSYSTEM=="usb", ACTION=="add", ATTR{idVendor}=="04b4", ATTR{idProduct}=="8613", GROUP="plugdev", MODE="0660"
SUBSYSTEM=="usb", ACTION=="add", ATTRS{idVendor}=="04b4", ATTRS{idProduct}=="8613", DRIVER=="usbtest", RUN+="/bin/sh -c 'echo -n %k> %S%p/driver/unbind'"

add your user to group plugdev:
sudo usermod -G plugdev <your-user>

Radio astronomy resources

My simple Python script that displays currently visible radio sources from NRAO VLA Sky Survey catalogue DOWNLOAD

Stellarium software

New G4DDK preamps upgrade

System sensitivity improved by 50K

After few months of operation, today i managed to install new G4DDK preamps, build by hints from RW3BP article with system temperature about 70K, about 50K better than former preamps.

Some more photos of preamps.

Marko S57UUU wrote a software for easy NF measurement using RTL-SDR dongle, so everything i need is to run the software, press 1 to store ground noise, then wind the elevation, press 2 for cold sky and voila, there are the figures:

Comparission between yesterdays and today's recording shows nice improvement.

Picture of object  in Hydra, obs: C0920M12 name:  091805-120541 RA: 09:18:5.78 DEC:-12:05:41.3 pwr mJy: 40849.90 apparent power mJy: 36452.00

Old preamps, TSYS ~ 130K

New preamps, TSYS ~ 70K