This is a magnetic loop controller board designed by Loftur TF3LJ and VE2LJX. This PCB was designed by 9A3GOS (me) and assembled by two assembly factories. Each factory made 5 boards (minimum order quantity).
There is one via under the stepper driver which could be a little bigger, but I was driving 2 amps to a stepper motor without an issue.
Original design and documentation: https://sites.google.com/site/lofturj/to-automatically-tune-a-magnetic-loop-antenna
You can upload a compiled hex file to a teensy microcontroller or use Arduino environment to modify it and compile it yourself.
Read more “Magnetic loop controller PCB – design by Loftur E. Jónasson – TF3LJ / VE2LJX”
Among other great functionalities available on Anytone DMR radios, I just recorded how you can initiate a remote monitor and ranging request from one radio to another.
With ranging request, the receiving station is replying with a location. On a successful receive, initiating station either shows you distance/bearing between two radios or GPS coordinates of the second radio. If a receiving radio, that initiated a request, has a GPS lock, distance and bearing will be shown. Without a GPS lock, just a GPS coordinates of a remote radio will be shown. Of course, remote radio needs to have a GPS lock.
Read more “Anytone 578 mobile and 878 handheld VHF/UHF ranging and remote monitor”
Signal filtering on Yaesu FT-891
DEMO WITH VIDEO
When using js8call or more crowded ft8 frequencies, there are signals coming from all directions, some stronger and some weaker. And it looks like this.
Brighter yellow signals are stronger ones, but there are some fading signals in the middle, probably also decodable without a need to isolate them to ‘hear’ them better, but signals on a far right side we most probably need to isolate.
Read more “Using Shift, Width and Narrow filter on a radio”
JS8Call 2.0.0-RC3 on Ubuntu 19.10 from source
You can download binary version for Ubuntu 18.04, but for 19.10 you need to compile it yourself. Before compiling, there are some prerequisites you need to install from official Ubuntu repositories.
Hamlib is also required, so we will compile it also from the source.
JS8Call 2.0.0-RC3 one of the best features is that it can decode Normal, Fast and Turbo simultaneously.
Read more “Install JS8Call 2.0.0-RC3 on Ubuntu 19.10”