Microwave Activity

We took part in the September issue of the so-called Austrian Microwave Activity Contest which had some hot activity in and around Vienna. Several OMs activated Bisamberg (north-east of Vienna, Locator: JN88eh) and other locations in Lower Austria (Rosalia, Lichtenegg). We were active from rooftop at our home QTH (downtown Vienna, Locator: JN88ee, 32m above ground level) on the UHF-Band (70cm) and the X-Band (3cm). The team members of the Radio-Amateur-Klub of the TU Wien were Horia, OE1BQH, Gerald, OE1GAQ, and Chris, OE1VMC. Fotos below show some of the wild fun we had.


RTU Vollversammlung


The general assembly of the „Radio-Amateur-Klub der Technsichen Universität Wien“ took place on Wednesday July 17, 2019. Seventeen club members met in the Seminar Room 389-2 at the Institute of Telecommunications. Club members were invited to bring along a (small!) piece of hardware or an introductory presentation slide. Please contact OM Chris, OE1VMC, in case you didn’t receive the invitation by email.


  1. Welcome
  2. Introductory Round
  3. Activity Report by the Board
  4. Report by the Treasurer
  5. Member Reports
  6. Resolution on Suggestions to be forwarded to the Board
  7. Social Event




With 40 dBW EIRP on the X-Band

The X-Band Rig was recently boosted from 250mW to 4W transmit power. Edgar, Jakob OE1JMW, and Martin OE3UMB rewired the OE1XTU Rig and included the 4W power amplifier supplied by DB6NT into the setup. Together with the 57cm diameter offset dish, this yields  40 dBW (EIRP). After initial measurements, the Rig went on air. Several QSOs with  OE3A, OM3KII, OM3LQ and OE4WOG/p were logged on June 2 and two weeks later, on June 16, using SSB modulation. 73 de Chris


OE1XTU in All Austrian Emergency Exercise 2019

May 1 is the traditional date of the All Austrian Emergency Exercise (AOEE)The announcement (rules) for the All Austrian Exercise AOEE 80 / 40m can be found here

The radio amateurs of Austria, together with the Austrian Red Cross, the Johannitern, the ORF and A1 Telekom Austria on May 1 participate in the Austria-wide emergency communication exercise using shortwave radio to capture the situation and support the ad-hoc erection of emergency telecommunications infrastructure.

This year, our OE1XTU Team consists of the following operators: YL Laila OE1LZA, OM Dieter OE8KDK, OM Horia OE1BQH, OM Markus OE1AKA, OM Gerald OE1GAQ, OM Chris OE1VMC, and Ivan. Ivan is eagerly aspiring his amateur radio license and plans for the exam in June 2019. We take part in the AOEE contest as a high power station (using 200 W transmit power) in SSB.

Hypothetical scenario for the emergency radio exercise:

An atomic explosion in the higher air layers in eastern Europe triggered a NEMP (Nuclear Electromagnetic Pulse) and destroyed all commercial electronics in the area directly affected. The NEMP damaged the control system in an unknown number of nuclear power plants in such a way that in some reactor blocks the cooling failed and the meltdown occurred there. The aftermath was a blackout in much of Europe. Austria is also affected by the Black Out and the nuclear Fall Out.





We logged a total of 319 QSOs during the contest of which only 15 were on 40 meters. The table below follows the recent solar trend. The Austrian map below illustrates the geographical distribution of our QSO partners: blue areas show districts contacted on 80 meters, red areas show districts which we contacted on both 80 and 40 meters. White areas were not contacted at all.

The jump in the number of QSOs between 2018 and 2019 is partly due to our increased transmit power. During the years 2015-2018, we used the FT-2000 transceiver, barefoot, with only 100 W whereas this year, we upgraded to FTDX-5000MP giving 200 W.



Unboxing the FTDX-5000

Today, we unboxed the FTDX-5000 and installed in our shack. This replaces our HF rig and main workhorse, the FT-2000. Previously, this FTDX-5000 radio served the team  Team Y82F during WRTC 2018. The Y82F team consisted of Emir, E77DX (OE1EMS) and Chris, 9A5K . In the fotos below, you see Gerald, OE1GAQ, and Stefan, OE1ABU, eagerly testing the almost new FTDX-5000 transceiver.


Microwave Activity from Gloriette

Chris, OE1VMC, took part in February’s microwave activity using handheld equipment only. QTH was Gloriette hill in Schönbrunn garden, 231m above sea level. Equipment for 70cm: a modified Alinco DJ-S45CQS. Equipment for 23cm, 13cm, 9cm, 6cm: El Cuatro, see fotos below.

Regarding propagation conditions: the photos below show high level of air pollution over Vienna with lots of atmospheric scattering. The Cobenzl, Kahlenberg, and Leopoldsberg are totally obscured.

OE1XTU Shack Redesign

Finally, the historical wooden drawer cabinet needed to retire and we acquired a fancy modern one with blue drawers. This was the start of a major redesign of the shack layout. See photos below with Gerald OE1GAQ and Stefan OE1ABU hard a work. Still a lot of things need to be sorted out. After the dust has somewhat settled, we will replace the FT-2000 by our new FT-5000MP.

First contact with OE1XAW on 23cm

On Jan. 9, 2019, Herbert OE3KJN and Chris OE1VMC scheduled a first QSO between OE1XAW and OE1XTU on 23cm in F3E. We used „El Cuatro“ EC19r handheld transceiver with two Vivaldi antennas (H-Pol.) designed by Fred OE8FNK on the roof of the Institute (Locator: JN88ee47me,  28m AGL). On the side of OE1XAW, the Rig is a FT736 which supports 6m, 2m, 70cm, 23cm and the antenna is a discone. Foto below shows the El Cuatro with its two Vivaldi antennas (separate antennas for Tx and Rx) and two additional 70cm walkie-talkies used for QSO coordination.img_20190109_175605