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 electronic devices, that all have one thing in common: they need power and thus can be the source of unwanted… 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 »
During the morning of Feb. 23, conditions across the north pole appeared to be good. My JT signals were spotted in Alaska and on Hawaii. WH7AA (Hawaii) and KL7J (Alaska) reported me just after 06:00 UTC. The path to Hawaii crosses the polar region and is prone to absorption. Although the magnetic indices were not… 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 »
Today, I received my new QSL cards. I ran out of them quite some time ago and looking around on the internet, I found ON5UR Maxi-Print. Well, I can strongly recommend Max, ON5UR. I was really surprised by his quality of service. I sent a design which he could have printed “as is” but instead,… Continue reading »
Recently, I published an article with tips for more success on 60 metres. In the article, I said that it would be a good idea to switch from JT65 to to JT9, when a band is crowded. Because of the reduced bandwidth, more stations will fit into the available spectrum. On some bands it can… Continue reading »
On the site of the IARU region 1 monitoring system (“intruder watch”) one can find newsletters and reports about what is going on with regard to intruders and pirates. I am grateful for their effort. On page 2 of the December 2016 report, VK5EEE paints a picture that sent me shivers down my spine. Although… Continue reading »