![The K3NG Arduino Rotator Controller](https://sz1a.org/wp-content/uploads/2022/04/K3NG-ARDUINO-555x400.jpeg)
How To Build a Rotator Controller with a Computer Interface
The Problem Very often we have seen a rotator control interface for a computer. They are usually quite expensive and we convince ourselves that we do not need it. Only those who have used it, […]
![Etch your own circuit board PCB in 10 EASY Steps](https://sz1a.org/wp-content/uploads/2020/12/fbutube-circuitboard-SV1ELF-play-555x337.jpg)
TEN Easy Steps To Etch Your Own Quality Circuit Board – PCB (video)
Many of us have tried to make our own board for our favorite project. Unfortunately, most do not get the desired results. Usually, our board will need a lot of work to become functional. We’ll […]
![](https://sz1a.org/wp-content/uploads/2020/09/radiofrequency-1170x500-SV1ELF-555x400.png)
How-To Easily Measure Unwanted RF
Recently I have noticed that there is a lot of interest in the amateur radio community regarding baluns-chokes with ferrites, the placement of which is intended to reduce returned and unwanted RF. Introduction Most of […]
![SSB QSO via Qatar OSCAR-100 - The First Geostationary Satellite carrying Amateur Radio](https://sz1a.org/wp-content/uploads/2020/03/QO-100-QSO-SV1ELF-Play-555x320.jpg)
A Practical Guide to Getting on Qatar OSCAR-100 (video)
An Introduction Qatar OSCAR 100 launched on November 15, 2018, and is the first geostationary satellite with an amateur radio transponder on-board. It is a joint project of the Qatar Satellite Company (Es’hailSat), the Qatar […]