Monitoring System (IARUMS)

Radio Ethiopia which is jamming Voice of Broad Masses from Eritrea!!!

If you regularly listen into the new range 7100 - 7200 kHz in the evening hours (starting 1630 UTC, lasting about one hour) you will find on 7165 kHz, sometimes on 7175 kHz, a powerful wideband rushing noise which is some 15 kHz wide and producing an S 9 + 20 dB-Signal at my 40-m Inverted-Vee dipole antenna. Also very faintly you can hear the carrier of a program below the jammer.

Who is the jammer, and which is the jammed program? 

Read more: Radio Ethiopia which is jamming Voice of Broad Masses from Eritrea!!!

China National Radio 1 (CNR1) is transmitting parallel on 7130 and 7185 kHz!

For some time there was a big QUERY about the BC stations on 7130 and 7185 kHz. Uli, DJ9KR found them with the same program from 1500 - 1700 UTC. Sign off of the 7130 kHz QRG is 1735, sign off of the 7185 kHz QRG is 1700 kHz. The language is Chinese. Which were these stations? Was is CNR1 from CHN or was it a radio station from Taiwan (TWN). Of course in both countries Chinese is spoken.

Wolfgang Bueschel DF5SX told Uli to compare the frequencies above with other regular frequencies where CNR1 is transmitting. On 11925 kHz he found the same program as on 7130/7185 kHz even much stronger. This proves: It is Chinese National Radio 1(CNR1) which is transmitting on 7130/7185 kHz at the same time!

At 1704 UTC Uli found a 2nd program at the same time on 7130 kHz. This could be Sound of Hope, TWN. But more investigations are necessary.

During the past months the Hainan Firedrake Jammer was always on 7130 and 7185kHz. It has stopped. Is transmitting the program of CNR1 the new type of jamming on TWN BC stations?

Illegal CIS taxitraffic on 28000 - 29700 kHz

The rising conditions on the Amateur Radio 10 m-band are daily showing, that the band is still abused by illegal traffic in FM by taxis from Russia, Belorussia and Ukraine. You can find them in 5 kHz increments (28000 +). The base stations are operated by women, their husbands in the taxi cabs are audible sometimes, too. 

* CIS = Community of Independant States

Radio Hargeisa on 7145 kHz

DJ6SI QSLOn 12 May 2009, DJ9KR  - Uli had a phone call with Mr. Baldur Drobnica - DJ6SI. He is the Consultant of the Republic of Somaliland in Germany. He is also the QSL Manager for BC station Radio Hargeisa. 

DJ6SI is a very famous DX-peditioner and, during the DX-pedition to Spratley Island (Chinese Sea) many years ago his ship was shot from the island and took fire. 2 OPs were killed, and the others were found drifting one week later. See his homepage on


Today DJ9KR  - Uli received his letter. It says:

"Dear Ulrich,

I will write to the Minister of Communications in Hargeisa and ask him to change the frequency of Radio Hargeisa. (...) I hope that my petition in Hargeisa will be successful.

Regards and best 73,

de:- BALDUR "

Click here to see a copy of the letter

Tribal and French Language net on 14000 USB

Please observe 14000 USB. There is a net in tribal and French language on this QRG, daily at various times. Bearings from DK2OM were showing North-West Africa. Male and female voices heard sounding sometimes like phonepatch. Possibly an NGO. Please report your observations to IARUMS Region 1 Coordinator, Wolfgang Hadel - DK2OM

Further Monitoring of the frequency the following few day did not spot any further illegal activtities.

Broadcast Stations still Transmitting in the Range 7100 – 7200 kHz‎

A Report by the  Wireless Institute of Australia (March 26, 2009)‎

See list of Broadcast Intruders still transmitting in the Range 7100 – 7200 kHz!‎

Check the screen shot covering 7100 - 7200 kHz, taken 20 May 2009 from 0000 - 2400 UTC (Source: DARC MONITORING SYSTEM Intruder Watch)

At 0001 on Sunday March 29, 2009, a brand new HF transmission season will commence. This ‎will be A09 season, and it will mark the end of SW broadcasting in the 7100 – 7200 kHz spectrum, ‎a frequency range allocated from that date exclusively on a worldwide basis to the Amateur Radio ‎Service.‎

This new schedule season will be the long one – seven months – and continuing zero sunspot ‎activity will compel international broadcasters to move into the spectrum below 12 MHz for long ‎distance transmissions over darkness or semi-darkness paths.‎ The spectrum above 12 MHz will be used mainly for transmissions following sunlit or partial sunlit ‎paths.‎

Read more: Broadcast Stations still Transmitting in the Range 7100 – 7200 kHz‎

International Classification of Emissions

The following short list of classifications of emissions is for those modes most frequently used by non-amateur ‎stations operating in the Amateur Bands and is for you guidance only. While the list is not complete it covers the ‎Minimum format to be used when submitting reports. For your further information the paper contains an extract ‎of the ITU classifications of emission for those who wish to report the full details of signals heard.‎

Some examples of symbols for the most common classes of emission.‎

   Single side band, suppressed carrier (SSB)‎  J3E
   Frequency modulation (FM)‎   F3E
   Phase modulation (PM)‎    G3E
   Amplitude modulation (AM)‎   A3E
   Direct frequency shift keying of the carrier  F1B
   Frequency shift keyed audio tone (FM)‎  F2A
   Frequency shift keyed audio tone (SSB)‎  J2B

   On/off keying of carrier (hand sending)‎  A1A
   On/off keying of carrier for automatic reception A1B
  On/off keying of the Audio tone (FM transmitter)‎ F2A

Extract from the Radio Regulations of Article 2, Nomenclature.‎

Section III. Designation of Emissions

S2.2‎ Emissions shall be designated according to their necessary bandwidth and their classification ‎in accordance with the method described in Appendix 1.‎

Extract from the Radio Regulations of Appendix 1‎


Classification of Emissions and Necessary Bandwidths

‎(see Article 2)‎

Section II. Classification

‎§ 3.‎ The class of emission is a set of characteristics conforming to § 4 below.‎

‎§ 4.‎ Emissions shall be classified and symbolised according to their basic characteristics as given in Sub-‎Section IIA and any optional additional characteristics as provided for in Sub-Section IIB.‎

‎§ 5.‎ The basic characteristics (see Sub-Section IIA) are;‎

‎(1) first symbol - type of modulation of the main carrier;‎
‎(2) second symbol - nature of signal(s) modulating the main carrier;‎
‎(3) third symbol - type of information to be transmitted.‎

Modulation used only for short periods and for incidental purposes (such as, in many cases, for ‎identification or calling) may be ignored provided that the necessary bandwidth as indicated is not thereby ‎increased.‎

Sub-Section IIA. Basic Characteristics

‎§ 6.‎ ‎(1) First symbol - type of modulation of the main carrier‎
 ‎(1.1) Emission of an unmodulated carrier‎    N
 ‎(1.2) Emission in which the main carrier is amplitude-modulated ‎(including cases where sub-carriers are angle-modulated)‎ 
  ‎(1.2.1) Double-sideband      A
  ‎(1.2.2) Single-sideband, full carrier    H
  ‎(1.2.3) Single-sideband, reduced or variable level carrier  R
  ‎(1.2.4) Single-sideband, suppressed carrier    J
  ‎(1.2.5) Independent sidebands     B
  ‎(1.2.6) Vestigial sidebands‎     C
  ‎(1.3) Emission in which the main carrier is angle-modulated
  ‎(1.3.1) Frequency modulation‎     F
  ‎(1.3.2) Phase Modulation‎      G
 ‎ (1.4) Emission in which the main carrier is amplitude - and‎ angle-modulated either simultaneously or in a pre-established sequence      D

 ‎(1.5) Emission of pulses2‎
   ‎(1.5.1) Sequence of unmodulated pulses‎    P
  ‎ (1.5.2) A sequence of pulses‎
   ‎( modulated in amplitude‎    F
   ‎( modulated in width/duration‎   L
   ‎( modulated in position/phase‎   M
   ‎( in which the carrier is angle modulated‎
    ‎ during the angle-period of the pulse  Q
   ‎( which is a combination of the forgoing‎
    ‎ or is produced by other means‎   V
 ‎(1.6) Cases not covered above, in which an emission consists of
  ‎ the main carrier modulated, either simultaneously or in a‎
  ‎ pre-established sequence, in a combination of tow or more of
  ‎ the following modes; amplitude, angle, pulse‎   W
 ‎(1.7) Cases not otherwise covered‎     X
‎2Emissions where the main carrier is directly modulated by a signal which has been coded into ‎quantized form (e.g. pulse code modulation) should be designated under (1.2) or (1.3)‎

‎§ 6.‎ ‎(2) Second symbol - nature of signals(s) modulating the main carrier
  ‎(2.1) No modulating signal‎      ‎0‎
  ‎(2.2) A single channel containing quantized or digital information‎
   without the use of a modulating sub-carrier3‎   ‎1‎
  ‎(2.3) A single channel containing quantized or digital information‎
   with the use of a modulating sub-carrier3‎    ‎2‎
  ‎(2.4) A single channel containing analogue information‎   ‎3‎
  ‎(2.5) Two or more channels containing quantized or digital‎
   ‎ information‎       ‎7‎
  ‎(2.5) Two or more channels containing analogue information ‎  ‎8‎
  ‎(2.7) Composite system with one or ,more channels containing
   ‎ quantized or digital information, together with one or more‎
   ‎ channels containing analogue information‎    ‎9‎
  ‎(2.8) Cases not otherwise covered‎     X
 ‎3 This excludes time-division multiplex.‎
‎§ 6.‎ ‎(3) Third Symbol - type of information to be transmitted‎
  ‎(3.1) No information transmitted‎     N
  ‎(3.2) Telegraphy - for aural reception‎     A
  ‎(3.3) Telegraphy - for automatic reception‎    B
  ‎(3.4) Facsimile‎       C
  ‎(3.5) Data transmission, telemetry, telecommand    D
  ‎(3.6) Telephony (including sound broadcasting)‎    E
  ‎(3.7) Television (video)‎      F
  ‎(3.8) Combination of above‎      W
  ‎(3.9) Cases not otherwise covered‎     X

 ‎4 In this context the word ‘information’ does not include information of a constant, unvarying nature ‎such as is provided by standard frequency emissions, continuous wave and pulse radar. etc.‎

Sub-Section IIB. Optional Characteristics for the Classification of Emissions

‎§ 7.‎  Two optional characteristic should be added for a more complete description of an
emission. These are (see also Recommendation 62)‎
   Fourth symbol - Details of signal(s)‎
   Fifth symbol - Nature of multiplexing‎
   Where the fourth or fifth symbol is used it shall be as indicated below.‎
   Where the fourth or fifth symbol is not used this should be indicated by a dash where each ‎symbol would otherwise appear

‎§ 7.‎ ‎(1)‎ Fourth symbol - Details of signal(s)‎
  ‎(1.1)‎ Two-condition code with elements of differing numbers and/or
   durations       A
  ‎(1.2)‎ Two-condition code with elements of the same number and
   duration without error correction     B
  ‎(1.3)‎ Two-condition code with elements of the same number and
   duration with error correction     C
  ‎(1.4)‎ Four-condition code in which each condition represents a ‎
   signal element (of one or more bits)‎    D
  ‎(1.5)‎ Multi-condition code in which each condition represents a ‎
   signal element (or one or more bits)‎    E
  ‎(1.6)‎ Multi-condition code in which each condition or combination
   of conditions represents a character    F
  ‎(1.7)‎ Sound of broadcasting quality (monophonic)‎   G
  ‎(1.8)‎ Sound of broadcasting quality (stereophonic or quadraphonic)‎ H
  ‎(1.9)‎ Sound of commercial quality (excluding categories given in
   sub-paragraphs 1.10 and 1.11)‎     J
  ‎(1.10)‎ Sound of commercial quality with the use of frequency
   inversion or band splitting     K
  ‎(1.11)‎ Sound of commercial quality with separate frequency- modulated‎
   signals to control the level of demodulated signal   L
  ‎(1.12)‎ Monochrome       M
  ‎(1.13)‎ Colour       N
  ‎(1.14)‎ Combination of the above     W
  ‎(1,15)‎ Cases not otherwise covered     X
‎§ 7.‎ ‎(2)‎ Fifth symbol - Nature of Multiplexing‎
  ‎(2.1)‎ None        N
  ‎(2.2)‎ Code-division multiplex5‎     C
  ‎(2.3)‎ Frequency-division multiplex     F
  ‎(2.4)‎ Time-division multiplex     T
  ‎(2.5)‎ Combination of frequency-division multiplex and time-division
   multiplex       W ‎
  ‎(2.6)‎ Other types of multiplexing     X
 ‎5 This includes bandwidth expansion technique