Category Archives: Allgemein

New Beacon SR1KOL in JO74SE

July 30th, 2018

After I noticed some spots for SR1KOL in JO74SE on 1296.960 MHz, I monitored the frequency using WSJT-X Wide Graph. About 400 Hz below the nominal frequency traces of a F1 signal can be seen, when airplanes cross the path to the beacon. The signal is not audible, but I am pretty sure, it is SR1KOL.

Traces of SR1KOL in JO74SE, “1000” = 1296.960 MHz. The strong signal at the very left is a birdie.

Some information can be found on the website of Polski Klub UKF: It is located on a high rise building in Kołobrzeg, 40 m above ground. The power is 3 W into a slot antenna. Beacon keeper is Andrzej, SQ1GU.

The video shows an A380 crossing the path between DJ5AR and SR1KOL. At minute 2:00 the plane crosses the first time and at minute 4:00 after a turn it crosses a second time. Mind the traces at 580 Hz in the waterfall diagram. The 1000 Hz mark corresponds to 1296.960 MHz.

Irek, SP5MX, who was involved in building the beacon and who repaired it recently, told me, the beacons reference is an OCXO withtout any GPS-lock. So possibly the beacon may transmit 400 Hz lower than defined.

At least in the morning of July 31st audible reflections could be heard via an Airbus A330. This time the 1000 Hz mark correspondents to 1296.9596 MHz.

After 10 seconds the noise becomes a kind of ‘musical’. Another 10 seconds later experienced ears can hear the tone.

 

13 cm Beacon GB3MHS now GB3MHZ

June 23rd, 2018

When switching to 13 cm after monitoring GB3MHZ on 23 cm, I heard typical PI4 sound followed by a callsign in CW. So I learned, former GB3MHS changed the callsign to GB3MHZ and is transmitting in PI4 now.

DL65DARC will be QRV on 23 and 13 cm

June 15th, 2015

From Monday, June 22nd to Wednesday, June 24th I will be QRV during the evenings on 23 cm and 13 cm using the special event callsign DL65DARC.
Skeds (aircraft scatter, tropo) are welcome via ON4KST, Facebook or email.

Rig will be a 3 m dish with 150 W on 23 cm and 75 W on 13 cm. The QTH locator is JN49CV. SSB, CW and WSJT modes are suitable. Operation on relays is not intended.

If I find some spare time, I will be QRV on June 25th, 26th and 28th as well.

On Saturday, June 27th, you can meet me in Friedrichshafen.

 

Back on air again!

January 19th, 2012

After being qrt by family and business reasons for nearly twenty years, I started in July 2011 in activating my irish call sign EI8HH on 50 MHz. Since January 2012 I am qrv again as DJ5AR from my QTH in Mainz.

The way working on the microwave bands has changed. No more CQs for hours and hours, but a fine chat at ON4KSTs server to make skeds on the bands wich provides much more efficiency than the way, we tried to make QSOs twenty years ago. A SDR makes it possible to display a spectrum of the band on the screen in a waterfall diagram. What a huge comfort compared to the old times. So it is no problem anymore to find somebody for a sked on 23 or 13 cm. Soon after setting up the old equipment for 1296 MHz I managed to work a couple of new squares and had my first QSO ever over the alps to Italy. It was amazing to hear the strong signal of IK3GHY with my 1.2 m dish.