The latest events ...

You can find some of the latest events around the club here.


Repair of the rotor for the 10 meter Yagi antenna

The rotor at the base of the Yagi antenna for the 10-meter band no longer worked reliably, the control unit could no longer detect the current direction of the antenna. Therefore the rotor, a Daiwa MR-750, was dismantled and disassembled together on May 1, 2022. It quickly became clear that a connecting cable on the potentiometer for direction detection had come loose. Inside the rotor had also accumulated a lot of white powder. Presumably, this was aluminum oxide, which had formed in recent years due to corrosion.
In the morning of Mai 8, 2022, those present removed the white powder with compressed air. On subsequent Sundays, the rotor will be lubricated, assembled and reattached to the mast.


Anton and Klaus (DL5RFK) clean the rotor gear with compressed air. (Photo: Oliver, DK7TX)

Multimode repeater with new outdoor antenna

On the afternoon of June 26, 2021, Andreas (DC4AB), Klaus (DL5RFK), Anton, Michael (DL5JS) and Norbert spontaneously decided to mount the groundplane antenna that had been ready since before Corona for the multimode repeater DB0DUX to an outside mast at the club station, 35 meters above ground. In addition, the repeater radio itself was also moved to an already prepared outdoor box. With this DB0DUX on the 70 centimeter band is now hopefully better and further to work. Previously, the antenna hung on the window in the rooms of the club station since the license grant.


Dismantling of shortwave dipole antennas

For many decades, the local club had the good fortune to span three dipole antennas for the shortwave bands 40 meters, 80 meters and 160 meters from the club station building, the Heinrich-Hertz-Berufskolleg, to the neighboring building, the Franz-Jürgens-Berufskolleg. Unfortunately, the neighboring building is scheduled for demolition before the middle of 2021 (a new building has already been constructed right next to the old one). For the demolition we were asked to take down the dipole antennas now. This happened on June 26, 2021, with the help of Norbert, Mirko (DM1EM), Klaus (DL5RFK), Anton, Manfred (DH9EO), Holger (DL5KUT), Michael (DL5JS) and Andreas (DC4AB). Together, the antennas were dismantled and wound up in under an hour. We hope to find an alternative mounting point for the antennas soon.


Presentation about the preparation of the WRTC 2018

During the Local Club Evening on April 19, 2018, Holger (DL5KUT) gave a presentation about the preparations of the WRTC 2018 (World Radio Team Championship), a 24-hour amateur radio competition that takes place every four years and will be held this year from July 14 to 15, 2018 in Wittenberg in the northeast of Germany. Holger showed two presentations and gave an insight behind the scenes with some photos.


Holger (DL5KUT) (left) at his lecture. (Picture: Andreas, DC4AB)

DIY competition 2018

Four members brought their handicrafts to the DIY competition during the local club evening on 15 March 2018. In a small circle of only eleven people, the participants each presented their projects for five minutes before the vote. First place this year went to Andreas (DC4AB) for a small WiFi controllable box clamped between the segments of a shortwave wire antenna to extend the antenna by interconnecting the segments. The second place went to Johanna for an assembled robot kit that uses an analog circuit to draw a black line. The third place went to Holger (DL5KUT) for the antenna analyzer kit for shortwave antennas and to Marc (DM1MF) for a noise generator on a breadboard with a connected sampler in the form of an RTL SDR USB stick for measuring filters in the range between 500 kHz and 1900 MHz.


Those present after the vote. (Picture: Andreas, DC4AB)

Spring cleaning 2018

On Saturday, February 17, 2018 Andreas (DC4AB), Manfred (DH9EO), Dieter (DL2GK), Michael (DL5JS), Holger (DL5KUT), Udo (DL5UI), Marc (DM1MF) and Robert (DO7II) met to clean up the club station DL0DX. In six hours, all equipment was removed from the station into the corridor, and the station was vacuumed and cleaned. The opportunity was taken to dispose of parts that were no longer needed or defective. Afterwards all cables were laid new and neatly and all devices were assembled and connected again.


Holger (DL5KUT) and Michael (DL5JS) laying the cables. (Picture: Andreas, DC4AB)

To strengthen the helpers Robert (DO7II) had prepared a large pot with hot goulash soup and brought it with him.


The otherwise empty hallway in front of the club station. (Picture: Andreas, DC4AB)

Parallel to the spring cleaning, Andreas (DC4AB) and Manfred (DH9EO) installed a cable duct in the outdoor area, which leads from the station to the centre of the roof and connects the outer box for the Hamnet technology mounted there with the station. Udo (DL5UI) installed a surface-mounted fuse box with lightning protection devices for power and network on the station wall, which supplies the Hamnet box with power and network in a flash-proof manner.


Kale meal 2017

This year, 34 people followed the invitation to the traditional kale dinner during the local clubs evening on December 21, 2017. In addition to many members of R01, as well as their relatives and friends, there were also members from the neighboring local clubs, for example from R04 Hilden, R09 Neandertal, R12 Neuss, R22 Dusseldorf-Lohausen and R24 Haan. Although the planned extension of the restaurant this year was completed, but due to a missing acceptance of the fire department it was not yet possible to use it. That's how it got cozy. The very tasty kale with meatballs, mettwurst and slices of smoked pork chop tasted excellent again.


Despite the delicious meal, the conversation continued. (Picture: Andreas, DC4AB)

After the meal, the participants took the opportunity to exchange ideas with each other. Finally, the chairman was allowed to distribute a practical cloth bag with a homemade 'DARC R01' print for everyone as a small present.


SSB fieldday 2017 with DL0DX/p

Unlike the previous CW fieldday, adjacent to a feast day, on the first weekend of September 2017 plenty of fellow campaigners got together, who assisted in the construction and dismantling in Düsseldorf-Hubbelrath for the 24 hours IARU region 1 SSB fieldday under DL0DX/p, and also regularly alternate operating the radio. Stefan (DB1KL), Andreas (DC4AB), Manfred (DH9EO), Oliver (DK7TX), Agisilaos (DL1CNY), Dieter (DL2GK), Holger (DL5KUT), Hans-Georg (DL6WA), Marc (DM1MF), Daniel (DM3DA), Christoph (DO4TIF), Eric (DO6PA), Robert (DO7II) and Burkhard (DO8EW) were involved. By this we could work in pleasant three-hour shifts, each with one operator-man and one guard-man. The role of the guard-man was to be with the operator-man in the field (which is especially important at night), to handle the physical well-being of the operator-man and to make sure the generator is filled with enough fuel.

Because of the good experience, the leased, sound-insulated, very economical power generator with downstream inverter was used again. For the entire weekend, the barely audible generator consumed just less than 16 liters of gasoline. In addition to the shortwave station inside the ristrict R radio trailer, a caravan and the nocturnal lights were also connected to the generator. Fortunately, two antenna masts from formerly British military stock, which are already familiar to us, were not needed for their primary determination at this weekend and could be lent to us and between them we could comfortably span the shortwave dipole antenna.


Some of the participants in the party tent next to the radio trailer. (Picture: Andreas, DC4AB)

Successful participation of DA3X/p on SSB fieldday 2017

Even this year to the IARU Region 1 SSB fieldday 2017 the local club R01 was on air again with its contest station DA3X/p. This time the station was build up at the "Schäl Sitt" (Düsseldorfer dialect für 'suspicious side') in Neuss Uedesheim. Operators were Maximilian (DB1MC), Rudi (DL1EHR), Michael (DL5JS), Dieter (DL6EZ) and Mirko (DM1EM). The 570 submitted QSOs in the class "portable, multi operator, low power, non-assisted" were enough to reach the seventh place in Germany and the first place in the district Nordrhein.


Maximilian (DB1MC) and Mirko (DM1EM) at the radio desk. (Picture: Dieter, DL6EZ)

CW fieldday 2017

The CW fieldday weekend on June 03rd and 04th 2017 directly followed Whit Monday, a holiday. Presumably for this reason, initially only a few members were found who wanted to or could participate in construction, radio operation and dismantling of DL0DX/p. But then came Andreas (DC4AB), Manfred (DH9EO), Fabian (DL1KID), Dieter (DL2GK), Kai (DL3EAZ), Holger (DL5KUT), Hans-Georg (DL6WA), Marc (DM1MF), Daniel (DM3DA), Eric (DO6PA) and Robert (DO7II) together in Düsseldorf-Hubbelrath to participate in the CW competition. The result of this effort was with 652 established QSOs the eighteenth place among the German stations of the class "portable, multi operator, low power, non-assisted".


Technical discussion, in the background the radio-trailer. (Picture: Andreas, DC4AB)

A better placement reached the participants under DA3X/p. Rudi (DL1EHR), Michael (DL5JS) and Dieter (DL6EZ) achieved with 893 set QSOs the thirteenth place in the same class.