Calibrating your DVB-T dongle with R820T(2) chip
First: Installation of RTL-SDR

sudo apt-get update
sudo apt-get install cmake build-essential libusb-1.0-0-dev
cd ~
git clone git://git.osmocom.org/rtl-sdr.git
cd rtl-sdr
mkdir build
cd build
sudo make install
sudo ldconfig

Second: Installation of kalibrate-rlt

cd ~/src
sudo apt-get install libtool autoconf automake libfftw3-dev
git clone https://github.com/asdil12/kalibrate-rtl.git
cd kalibrate-rtl
git checkout arm_memory
sudo make install

Make sure the RTL stick is running for few minutes to let it warm-up. Get a first rough ppm offset estimation with: Read more


I’ve made some preset configuration files for the Kenwood TH-D7.
Read more


The Kenwood TM-D700 got a modification to enable repeater mode. Once done, you’ll find out the transmitted audio is not filtered well. After some research I’ve found this kenwood service bulletin and decided to give it a go and the result Read more