Successful Actions

Short Performance of “Voice of Turkey” on 21140 kHz

The good contacts of the German DARC-MONITORING SYSTEM Intruder Watch with the German telecoms. authorities “Bundesnetzagentur” (BnetzA) and Chief Engineers and Technicians of the HFBC Frequency Management of Turkish Radio-Television Corporation had quick results in removing the “Voice of Turkey” off 21140 kHz. Here is the full story:

On October 23, 2006 and the following days Wolf Hadel DK2OM and I found a BC station on 21140 kHz in the 15-m-band. The program lasted only one hour from 09.30 to 10.30 UTC. The signal strength maximum was S8 with a 3-element beam antenna “Fritzel FB-33”, and the signal was coming from south-east direction. The program language was Romanian. Sometimes Wolf and I could hear a second BC program “under” the Romanian voice. Which BC station was it, and how did the signal on 21140 kHz build up? Was the BC station transmitting on groundwave, or was it a harmonic or spurious radiation? As there were two different programs audible at the same time the signal possibly was an intermodulation product. 

Read more: Short Performance of “Voice of Turkey” on 21140 kHz

Harmful Interference by Meteo Beacon of French Ultra Light Planes

Harmful Interference by Meteo Beacon of French Ultra Light Planes on Swiss 2-m-Repeater

On 14 July 2008 the Swiss radio amateur HB9DTX, OP Yves Oesch, reported harmful interference to the Swiss (USKA) Intruder Watch. Swiss amateurs soon found out, that a group of French pilots of Ultra Light Planes had installed a meteorological beacon on the exclusive amateur radio frequency 145,000 MHz: Every 15 minutes there was a bulletin with meteorological data concerning the region of Agy Plane. Agy Plane is situated 20 km south of the Swiss city Geneva on French territory in Haute Savoy Department. These transmissions were causing harmful interference to the Swiss repeater HB9MM (location “Les Pléiades” near Vevey) whose input frequency is 145,000 MHz.

A direct letter to the Secretary of the Ultra Light Club “Agy Plane”, to OFCOM and to the Swiss coordinator of USKA Intruder Watch HB9CET by HB9TOB, OM Olivier Maillard soon led to a free frequency 145,000 MHz.

“We have fixed the problem of the beacon and have returned to the correct frequency. With all our excuses for the trouble yours, Pierre Bourier, Secretary of “Agy Plane”.

Fighting the Chinese Government “Firedragon”- Music Jammer AND “Sound of Hope” Broadcasting (SOH), Taiwan

SOH’s transmissions are the trigger of the jamming.
Mr Yue Chen from Sound of Hope Broadcasting shows a stubborn attitude!

The first QSL card of the Net Control Station DL0IW of DARC Monitoring, it was designed some 30  years ago, shows St. George on horseback fighting the dragon. In Christian mythology the dragon is the sign of the evil. Do you remember Siegfried, the Teutonic hero also fighting the dragon? In these days another dragon, a Chinese language music jammer dubbed “Firedragon”, has been terrorizing the Radio Amateurs of the whole world. Earlier in December 2005 the Chinese National Radio Station “CNR” was heard with daily transmissions in the 17-m-Band. The purpose also was to jam the airwaves. But which BC-station was the target? Please read more!

Read more: Fighting the Chinese Government “Firedragon”- Music Jammer AND “Sound of Hope” Broadcasting (SOH),...

A Communications net of Pakistani UN Peacekeeping Forces in Liberia

 

A quick Success of DARC Bandwatch: A Communications net of Pakistani UN Peacekeeping Forces in Liberia has left 21415 kHz after a Complaint by FAX and Email

If you carefully monitor the exclusive 15 m- Amateur Radio Band (21000 – 21450 kHz) you will often meet non-amateur radio stations in this section: Since quite some time there is a net of the Foreign Ministry of Sudan in PACTOR-1 and SSB on 21000 kHz. The crews of fish trawlers from Argentina are chatting on 21102 and 21111 in SSB. You will also regularly meet fishermen from Morocco on 21222 and their Spanish colleagues on 21230 and 21420 daily. But you just have to listen! *)

Weatherfax on 14001.900 kHz stopped

On February, 18th 2009 and the following days DK2OM found a weatherfax transmission on 14001.900 kHz at 1730 utc. The parameters: 120 rpm and IOC 576. Location: Boston, USA. Transmitted by the US Coast Guard. Ident: NIK DK2OM informed AA3GZ (Jack) and sent him his screenshots. Jack informed the US authorities at once. On February 22nd the system did not appear again. We suppose that the transmission frequency has probably been mistuned.