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Jammer Jams Intruder as Amateur Band Encroachments Continue


A station believed to be that of a radio amateur in the Wittenberg, Germany, area attempted to use CW to jam a Russian Navy FSK (F1B) signal intruding on 14.192 MHz, according to the International Amateur Radio Union Region 1 (IARU-R1) Monitoring System (IARUMS). The June IARUMS newsletter said the signal has been spotted for more than a decade now.

“Absolutely not helpful,” was the reaction of Wolf Hadel, DK2OM, IARUMS co-coordinator and the newsletter’s editor, to the vigilante jamming. According to Hadel, the Russian FSK signal parameters are 50 and 75 baud, 200 and 500 Hz shift, “sometimes only idling.”

The newsletter reported that the Polish military continues to transmit on 6998.5 kHz using both automatic link establishment (ALE) digital and USB voice traffic, affecting the very low end of 40 meters at approximately 0700 UTC. German telecoms regulator Bundesnetzagentur (BNetzA) sent an official complaint to Polish telecoms authorities in February.

Broadcaster “Sound of Hope” from Taiwan continues to be jammed by a much stronger signal from China on 18.080 MHz each morning at about 0600 and later. Broadcast transmissions in this band are illegal, and BNetzA has complained. The agency also has complained formally about intruding spurious transmissions daily from a broadcaster in Iran on 7205 kHz, extending down to 7195 kHz and up to 7215 kHz.

Illegal fishery traffic, much of it from Spain, Portugal, the UK, and Morocco has been observed on most bands “as usual,” often in the CW subbands.

A possible over-the-horizon radar operating from Iran was reported transmitting daily on 28.960 MHz, covering about 50 kHz. “The sweep rates are much too high for long-range OTH radar,” the newsletter observed. “It could be that the radar is used for short and medium distances.”

An experimental high-frequency data plus voice link (HFD+VL) signal was reported on June 30 on 18.080 MHz by a radio amateur in Switzerland. The experimental transmissions are coming from the University of Las Palmas in Spain.

Pirates from the Philippines and Indonesia have been reported on several 40 meter frequencies as well as on other bands. Russian taxis, fisheries traffic, and citizens band operators also continue to intrude on 10 meters.

At Ham Radio 2016 in Friedrichshafen Germany, IARU Region 1 President Don Beattie, G3BJ, presented Hadel with the Region 1 Medal in recognition of his “ongoing exceptional leadership” of the IARUMS. “Being the leader of an excellent team is a great honor,” Hadel remarked.



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