Fifth edition of the N&O column / Spooks newsletter

(Date: Tue, 25 Aug 1998 23:23:48 +0200)

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Worldwide Jam Session pt.2

In WORLDWIDE JAM SESSION pt.1, I mentioned the 'Backward Music station' as example of a pre-recorded jamming signal. This is not correct. The BM stations no not transmit music. There are however jammers who really do transmit distorted or backward music.

The VOA has an interesting page about jamming; ''Jamming - a technical response to a political problem'' is the title.

There is a selection of jamming types used against various international broadcast language services. The samples are in RealAudio and Sun format (.ra and .au).

A good explanation of jamming, albeit a bit out of date, is contained in the classic VOA Monitoring presentation called "The Sounds of Jamming." You can hear all 14.5 minutes of it in RA here.

New book: ''JAMMING'' by Rimantas Pleikys

'Jamming' is a comprehensive, 164-page book about the jamming system of the former Soviet Union and its allies. It includes a historical and technical review from Cuba to North Korea. The book is written in the English language.

The author of the book is fellow dx-er Rimantas Pleikys, former Minister of Communications and Informatics of the Republic of Lithuania. Rimantas is now Member of Parliament of Lithuania.

Price: US$ 14.95 (plus US$ 2.00 for airmail delivery)

Distributor:
Mr. Sigitas Zilionis, P. d. 985, LT-2300 Vilnius, Lithuania.

A must have for everyone who is interested in the history of jamming.

I read the book in one day, which should indicate how much I like it :-)

Thanks to the dxers who sent me their jammer logs, I was able to compile a list of jammed frequencies in the 4,5 and 6 MHz bands.

Note: Most of the Lincolnshire Poacher and Cherry Ripe frequencies are jammed from time to time. Some even on a daily basis. The jammer is Iran.

VOA, Voice of Free Asia, Radio Free Europe and Radio Freedom also experience jamming of various Asian language broadcasts. Jammers are China, Tibet, Burma, Vietnam and N.Korea.

VOA's Farsi programs are being jammed by Iran. Cuba jams Radio Marti, Radio Miami and various other stations who transmit Cuban freedom stations.

The Voice of Mojahed operates on many frequencies and is being jammed by Iran. Lots of other clandestine stations are being jammed by various countries. Iran, Iraq and Turkey are jamming a number of Kurdish radio and tv stations.

Freq. Time Date Jammer type Station being jammed
1566 1750   Bubble. Iran VIRI
3840 1000   Reverberator. Vo National Salvation
4120 1000   Reverberator. Vo National Salvation
4418 1700 160498 Chirp2 in ssb mode.  
4422 1900   Bubble.  
4430 1900   Bubble.  
4440 1900   Bubble.  
4448 1656 160498 Chirp1 in dsb full carrier. Broadcaster
4450 0202 270498 Bubble.  
4450 0227 290498 Bubble & Pulser.  
4450 1000   Reverberator. Vo National Salvation
4461 0202 270498 Bubble.  
4462 1900   Bubble.  
4470 0201 270498 Bubble.  
4470 1900   Bubble.  
4485     Bubble.  
4485 0223 260498 Bubble. Music faintly audible
4615 1900   Bubble.  
4620 1900   Bubble.  
4630 1900   Bubble.  
4639 0209 270498 Bubble.  
4639 0228 290498 Bubble.  
4640 1900   Bubble.  
4645     Warble.  
4645 0209 270498 Bubble. (same as above)
4645 0220 260498 Bubble. (same as above)
4645 0224 280498 Bubble. (same as above)
4645 0251 240498 Bubble. Tallin ATIS audible - no sign of any cland.
4649 0210 270498 Bubble.  
4650 1900   Bubble.  
4660     Warble.  
4670 1900   Bubble.  
4679 0222 260498 Bubble.  
4679 0223 280498 Pulser.  
4679 1814 150498 Bubble.  
4680     Bubble.  
4818 1645 160498 Chirp2 (slower chirp) in dsb. Broadcaster
4820 1900   Bubble.  
4830 1900   Bubble.  
4850 0154-0220   Bubble. VO Mojahed
4852 0212 270498 Bubble.  
4860     Bubble. Cland
4862 1900   Bubble.  
4865 0222 280498 Bubble. OM presenter just audible under QRM
4865 0229 290498 Bubble & Pulsers.  
4875 0212 270498 Bubble.  
4878 1641 160498 Chirp1 in dsb no carrier. Broadcaster
4880     Bubble. Mossad
4880 1816 150498 Pulser. Blank AM carrier + Single letter 'V' in CW
4945 1845   Pulse.  
5120 1900   Bubble.  
5125     Fast bubble.  
5130 1900   Bubble.  
5142 0214 280498 Bubble.  
5160 0214 280498 Bubble. Carrier just detected
5160 0217 260498 Pulser.  
5170 0218 260498 Bubble.  
5180 0158 270498 Rapid Pulser.  
5320 1900   Bubble.  
5330 0219 260498 Pulser.  
5330 0226 290498 Pulser & Bubble.  
5340 0159 270498 Rapid Pulser.  
5350     Bubble.  
5350 1900   Bubble.  
5351     Bubble (not the same as 5350).  
5351 0159 270498 Pulser.  
5358     Fast bubble.  
5361 0200 270498 Bubble.  
5370     Bubble. Unmodulated AM carrier
5370 0216 280498 Bubble.  
5422     Bubble. YL numbers stn
5617 1900   Bubble.  
5618 0201 230498 Bubble. Clandestine OM presenter
5618 0225 290498 Bubble. Causing QRM to Shanwick on 5616 kHz
5620 0157 270498 Bubble. Carrier just audible
5620 0223 290498 Bubble.  
5620 0255 240498 Bubble. VO Mojahed
5623 1719 160498 Chirp3 (the "frying canary').  
5629 1808 150498 Rapid Pulser.  
5630     Fast bubble.  
5630 0205 230498 Bubble. VO Mojaed
5630 0211 280498 Bubble. Clandestine just audible with YL presenter
5630 0254 240498 Rapid Pulser.  
5636 0216 260498 Bubble.  
5640 0209 280498 Bubble. Blank AM Carrier
5640 0230 260498 Bubble. Blank AM Carrier
5640 0233 290498 Bubble. Clandestine clearly heard when off
5642 1900   Bubble.  
5647 0211 260498 Bubble.  
5648 1708 160498 Chirp1 in dsb. some arabic or farsi broadcaster
5649 1807 150498 Pulser.  
5650 0156 270498 Bubble.  
5650 0207 280498 Bubble. Clandestine just audible with YL presenter.
5650 0215 260498 Bubble.  
5650 0223 290498 Bubble.  
5650 0244 240498 Bubble.  
5658     Bubble. Blocking Bombay aero
5658 0214 260498 Bubble.  
5658 1601 160498 Chirp. Broadcaster
5660 0206 230498 Bubble. Clandestine – YL presenter
5660 0229 270498 Bubble. Carrier just detected
5660 1745   Warble. Cland.? with a marching song and unid language
5668 0243 240498 Rapid Pulser.  
5670 0157 230498 Pulser. Clandestine – YL Presenter
5670 0206 280498 Rapid Pulser (same as above).  
5670 0223 290498 Rapid Pulser (same as above).  
5670 0220   Bubble. VO Mojahed
5670 0253 240498 Bubble. Blank AM Carrier
5670 1647 160498 Bubble.  
5670 1806 150498 Bubble.  
5678 0242 240498 Bubble.  
5678 1707 160498 Chirp1 in double side band.  
5679 0212 260498 Bubble.  
5680     Bubble.  
5680 0149 240498 Bubble and Pulsers.  
5680 0150 270498 Bubble.  
5680 0201 230498 Bubble.  
5680 0203 280498 Bubble. Carrier just audible
5680 0203 290498 Bubble. Clandestine very clear OM presenter
5680 1633 270498 Bubble.  
5680 1654 260498 Bubble. Iraqi Clandestine?
5720     Wide bubble.  
5720 0241 240498 Bubble.  
5730 1900   Bubble.  
5734 1704 160498 Chirp1 in dsb.  
5736 0204 280498 Bubble. AM Carrier detected
5740     Bubble.  
5746 1706 160498 Bubble.  
5747 0152 270498 Bubble.  
5750 0153 270498 Bubble.  
5750 0202 230498 Bubble. Clandestine
5750 0222 290498 Bubble.  
5750 1707 160498 Bubble. Vo Mohajed
5754 1803 150498 Bubble.  
5756 1900   Bubble.  
5760 0222 290498 Bubble.  
5763 1900   Bubble.  
5766 0232 260498 Bubble.  
5770 0223 270498 Bubble.  
5770 1804 150498 Bubble.  
5778 0155 270498 Bubble.  
5780 0231 260498 Bubble.  
5783 0221 270498 Bubble.  
6167 1915-1945   Bubble. Vo Mohajed
6175 1915-1945   Bubble. Vo Mohajed
6220 0219 280498 Bubble. AM Carrier detected
6220 0230 290498 Bubble.  
6221 1900   Bubble.  
6230 1900   Bubble.  
6240 0227 260498 Bubble. Blank AM Carrier
6240 0233 290498 ? Clandestine in clear with Arabic music
6245 1900   Bubble.  
6250 0217 270498 Bubble. AM Carrier detected
6250 1900   Bubble.  
6251 0218 280498 Bubble. AM Carrier detected
6259 2249   ? La Voz de La Resistencia –CLM-
6262 1900   Bubble.  
6263 0217 280498 Bubble.  
6270 1915-1945   Bubble. Vo Mohajed
6955 1900   Bubble.  
7070     Warble Bubble. Vo the Palestine Islamic Revolution
8320 1200   Diesel engine room wind tunnel. Cherry Ripe
9251 2200   Bubble. Lincolnshire Poacher
9955     Pulse. Radio Miami jammed by Cuba
9958 0200-0300   Warble. Unid spanish station
11540 1900-2300   Bubble. Radio Kudriat (UDFN)
12056 1200   Diesel engine room wind tunnel. Cherry Ripe
14487 0900-1700   Bubble. Lincolnshire Poacher
See also Newsletter 8

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