< Electronics
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
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
See also
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