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PD5DJ Articles
New 5 Elements LFA for 2M
There has been a lot of ES propagation lately. With my Bigwheel antenna for 2m I can make very nice contacts. Since the Bigwheel is approximately 5dBi, I wanted a little more gain and...
New portable Telescopic mast
Last month, I visited the fair in Beetsterzwaag and came across the booth by EPS Antennas. Among their array of intriguing equipment, a +/- 11m telescopic aluminum mast caught my eye. It was a...
Fixing 10/11m 5/8 Vertical
During a field activation I noticed that my 10m 5/8L Vertical occasionally performed poorly. I soon discovered that a solder contact had broken loose. Probably due to transport. With some trickery I was able...
Thesis Koos Fockes about Man-Made Radio noise
ArticelsI recently found a topic on a forum referring to a thesis by Koos Fockens, Koos received his PhD from the University of Twente for research into man-made radio interference / noise. I thought...
Battery Box upgrade
In the summer of 2023 I started using a LifePo4 battery. I had made this in a bag for the time being, with all electronics loose in the bag. Of course this will cause...
Tuner functionality added to Portable Setup
Portable Setup Upgrades April 2024 I’ve made some additions to my Portable Setup. Auto tuner added, with a wider tune range. BalUn added to work with ladderline. Tuning Aid added. Auto tuner I had...
Utility Boxes for Baluns & UnUn’s
Lately I’ve been working a lot with Baluns and UnUn’s and Chokes. I always needed a new housing for that. These are ultimately quite pricey and sometimes difficult to obtain. That’s why I spent...
CI-V Tuning aid for ICOM Radios
Updates 17-04-2024: Firmware v0.2 Almost every HF radio from ICOM has a Tuner connector, you know that white 4-pin connector at the back of your radio. Via this connector you can give a command...
Signal Splitter box
Due to illness I had to enjoy myself a bit at home with the moments when I felt a bit good. I had small projects that were already finished but still needed to be...
Portable ATV Receiver
A while ago I came up with the idea of building a portable ATV receiver. Important features of this receiver had to be: 1. Large screen with real noise (no fake noise) 2. Of...
New Symmetrical Antenna system for HF
I’ve been thinking about setting up a symmetrical antenna system for a while now. That is, Ladder line fed dipole. I did a bit of measuring and was able to stretch 2 x 9m...
Add game Wordle to your BPQ (LinBPQ only)
I have written a tutorial on how to install an Application like Wordle for LinBPQ. BPQ Applications (Wordle)
LinBPQ & Direwolf installation
Over the past 2 weeks I have been busy getting the following things done: Transferring a Windows BPQ32 configuration to LinBPQ for the RaspberryPi. Communicating with an AEA PK-88 TNC in KISS mode. Install...
Universal DCD for 1200bd Packet modems.
Since I’m working with packet again, you encounter all kinds of problems and then have to solve them again. The same now. I recently purchased an AEA PK-88 packet modem. Only this one has...
Packet Radio Makes a Comeback in the Netherlands
In recent years, the Netherlands has witnessed a remarkable resurgence of packet radio, a digital communication technology that utilizes radio signals to transmit data. This revival can be largely attributed to a group of...
Fieldday meeting Spaarnewoude September 30, 2023
We recently spontaneously came up with the idea of holding a field day on September 30, 2023 in the Spaarnwoude recreation area (near Amsterdam). We had a nice day there with a few fellow...
New Portable setup
The summer of 2023 has ended, as well as portable operations. What I have noticed during my activations is that QRP can be a lot of fun, but also too challenging. If you want...
Working satellites portable
On July 26, 2023, I gave a demonstration at the NVRA on how to connect via one of the TEVEL satellites. We were lucky, because on this evening we had a nice pass with...
