Electronics/Gallery of VLF-signals

In the VLF-range signals from transmitters and jammers can be received.

The following table contains the most important signals in the range under 24 kHz. One should not expect to receive all stations at the same time. Some of the specified stationa are only few minutes per week active. Since these stations nearly all for the transmission of news to submerged submarines of naval forces, no transmission plans are available. Also a decoding of the signals might not succeed. One can enjoy however frequently about the signals on the spectrograms.

List of transmitters

Callsign	Frequency	Location of transmitter	Remarks
-	11.905 kHz	Russia (various locations)	Alpha-Navigation
-	12.649 kHz	Russia (various locations)	Alpha-Navigation
-	14.881 kHz	Russia (various locations)
-	15.625 kHz	-	Frequency of horizontal deflectors in cathode ray tube-based TVs, as defined by PAL and SÉCAM specifications
?	15.8 kHz	?
JXN	16.4 kHz	Helgeland ( Norway)
SAQ	17.2 kHz	Grimeton (Sweden)	Only active at special occasions, such as Alexanderson Day
-	ca. 17.5 kHz	?	a twenty second pulse
?	17.8 kHz	?	Transmit occasionally Superpulses
RDL, UPD, UFQE, UPP, UPD8	18.1 kHz	Russia (various locations)
HWU	18.3 kHz	Le Blanc (France)	Frequently inactive for longer periodes
RKS	18.9 kHz	Russia (various locations)	Rarely active
GBZ	19.6 kHz	Criggion (Great Britain)	Many operation modes, even Superpulseses
ICV	20.27 kHz	Tavolara (Italia)
RJH63, RJH66, RJH69, RJH77, RJH99	20.5 kHz	Russia (various locations)	Time signal transmitter Beta
ICV	20.76 kHz	Tavolara (Italia)
HWU	20.9 kHz	Le Blanc (France)
RDL	21.1 kHz	Russia (various locations)	rarely active
HWU	21.75 kHz	Le Blanc (France)
?	22.1 kHz	Anthorn (Great Britain)
?	22.3 kHz	Russia?	Only active on 2nd of each month for a short periode between 11o'clock and 13o'clock (respectively 10o'clock and 12o'clock in winter), if 2nd of each month is not a Sunday
RJH63, RJH66, RJH69, RJH77, RJH99	23 kHz	Russia (various locations)	Time signal transmitter Beta
DHO38	23.4 kHz	Saterland (Germany)
NAA	24 kHz	Cutler (USA)

Signals from GBZ on 19,6 kHz

• 
  Signal looking like a fish on 19.6 kHz
• 
  Signal looking like a garland on 19.6 kHz
• 
  Ornament-type signal on 19.6 kHz
• 
  A superpulse

Signals in the range between 17 kHz and 18 kHz

• 
  Twenty-second pulse
• 
  Signal of unidentified transmitter on 17.8 kHz
• 
  Signal of SAQ on July 4th, 2004

Signals from Russian "Beta"-time signal transmitters

• 
  Signal of RJH63
• 
  Signal of RJH77

Other signals

• 
  Signal of unknown transmitter on 17 kHz
• 
  Signal of the transmitter on 22.3 kHz listed in the table

Weblinks

• http://webflash.ess.washington.edu/

See also

VLF-reception with the PC