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 transmittersEdit

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 kHzEdit

Signals in the range between 17 kHz and 18 kHzEdit

Signals from Russian "Beta"-time signal transmittersEdit

Other signalsEdit


See alsoEdit

VLF-reception with the PC

Last modified on 29 November 2011, at 20:42