Recently, I received a note that Chines radio modems are used for telemetry. The note states that these transceivers are operating on our 2 metre band between 144 and 146 MHz. More details are expected. Along with the note, a link was sent with a URL to a Chinese company, selling these transceivers. They operate… Continue reading »
These days, we often hear the abbreviation IoT, which refers to the Internet of Things. For me, the abbreviation triggered the term “Interference of Things”. We live in an age of ever growing numbers of devices, that all have one thing in common: they need power and thus can be the source of unwanted emissions…. Continue reading »
Last week, I put up a dual band antenna for 6 and 4 metres. It was difficult to decide what to build. Last year, I had separate antennas for both bands. Dual band antennas are attractive, because of lesser wind load and also because it leaves some room for other antennas. Another aspect was that… Continue reading »
A short while ago, I had problems with my antenna system on 20 metres. It took a while to trace the cause. In 2015, I “restarted” amateur radio and put up a dipole for 60 metres. After a while, I decided to consider options to become QRV on other bands as well. I tried a… Continue reading »
In February 2107, a lecture (Dutch language) was given by PA2S. Op this page, the presentation can be found, along with links to resources.
Currently, I am working on a paper regarding propagation on 60 metres. Transmissions with JT mode were used to collect spots and create datasets. A valuable datasource is wsprnet.org, to which WSPR spots are uploaded and fed to a database. The data can be downloaded. In order to support the study, I developed a WSPR… Continue reading »
One of the latest developments is a parser/analyser for the ALL.TXT files that WSJT-X and JTDX create. The ALL.TXT file contains all sent and received messages and as I wanted to have a tool to retrieve the data in a structured way, I decided to write a parser. It is made in Visual Studio 6…. Continue reading »
Curiosity is one of my key drivers. Copying others is a dull game. Of course, sometimes, it is easier to make a copy than to create a bad lookalike, but in general, I prefer to explore unthreaded paths. That must be in my DNA:-) Thus, with the new 60 m allocation, these radio waves started… Continue reading »