Recording Details
100th anniversary of the inauguration of Grimeton Radio Station with the Alexanderson alternator @17.2 kHz
Recording Date
2025-07-02 08:45:00+02:00
Duration
1541 Seconds
Recording Location
Stattegg/Kalkleiten (near Graz),
Austria (AT)
(15° 26′ 01″ E / 47° 09′ 00″ N)
Band
VLF + LW
Frequency Range
10.0 kHz - 260.0 kHz
Bandwidth
250.0 kHz
Recording Device
RSPdx, SDRPlay
Antenna
Wellbrook ALA1530 (flex version) with custom-built loop (2windings, 1m diameter circular) ca 3m above ground
Band Middle Frequency
135.0 kHz
Encoding
ci16
Filter
MW/DAB, on board of the SDR
Pre-Amplifier Settings
custom built 20dB with AD811
Notes
VLF,LW Widebandscan 250 kHz, containing a special transmission of SAQ celebrating the 100th anniversary of the inauguration of Grimeton Radio Station, antenna redirected for optimum SBR from SAQ at approx. 10:00 UTC; AGC slow full story: https://alexander.n.se/en/celebrate-100-years-with-saq-grimeton
Recorded by
Hermann Scharfetter
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Forum / Comments / Addition Information
Radio Stations
| Frequency | SNR | S-Level | Country | Programme | TX Site | TX Power | Remarks |
|---|---|---|---|---|---|---|---|
| 17,2 kHz | 25 | S | SAQ | Grimeton | |||
| 18,1 kHz | 25 | RUS | RDL/UPD/UFQE/UPP/UPD8, MIL HQ Moskva VLF network | Krasnodar,Nizhny Novgorod, Arkhangelsk, others | |||
| 19,6 kHz | 25 | G | GQD, GBZ | Anthorn, Skelton | |||
| 20,27 kHz | 18 | I | ICV | Tavolara | |||
| 20,9 kHz | 25 | F | HWU | Le Blanc | |||
| 22,1 kHz | 30 | G | GQD, GBZ | Anthorn, Skelton | |||
| 23,4 kHz | 40 | D | DHO38, German Navy | Rhauderfehn | |||
| 24,0 kHz | 25 | USA | NAA, US Navy | Cutler, ME | |||
| 26,7 kHz | 40 | TUR | NAA, US Navy | Denizköy-Bafa TBB | |||
| 29,7 kHz | 35 | ISR | ISR, A1F3 | unknown, Negev Desert | |||
| 37,5 kHz | 25 | ISL | NRK, TFK/NRK 24h | Grindavik | |||
| 38,0 kHz | 25 | ??? | unidentified | unknown | |||
| 42,5 kHz | 25 | S | SRC, Swedish Navy | Varberg ? | |||
| 44,2 kHz | 25 | ? | ? | ? | |||
| 49,0 kHz | 35 | ? | unidentified | unknown | |||
| 51.95 kHz | 25 | G | GIY20: FAX, GNY1: UK Royal Navy, GYW1: F1B85 | Oxford, Thurso, Crimond | |||
| 57.4 kHz | 20 | unidentified | unidentified | unidentified | |||
| 60 kHz | 30 | G,J ? | MSF, JJY(CW IDentH+15) ? | Anthorn, Hagana-yama ? | |||
| 61,8 kHz | 25 | RUS | ??? | UNID - GIZ20 ?? | |||
| 62,6 kHz | 30 | F | FUE(French Navy Brest),FUG,FUG | Brest, La Regne, Brest | |||
| 63,85 kHz | 25 | F | FTA63 | Sainte-Assise | |||
| 66,67 kHz | 25 | RUS | RBU | Taldom | |||
| 67 kHz | 25 | ? | unidentified | unidentified | |||
| 77,5 kHz | 50 | D | DCF77 | Mainflingen | |||
| 129,1 kHz | 50 | D | DCF49 | Mainflingen EFR Funkruf | |||
| 135,6 kHz | 65 | HNG" | HGA22 | Lakihegy EFR Funkruf HNG | |||
| 139 kHz | 45 | D | DCF39 | Burg EFR Funkruf | |||
| 147,3 kHz | 20 | D | DDH47 | Pinneberg/DWD | |||
| 153 kHz | 50 | ROU | Antena Satelor | Brasov | |||
| 162 kHz | 40 | F | TDF time signal | Allouis | |||
| 171 kHz | 15 | MRC | Medi 1 | Nador MRC | |||
| 182 kHz | 20 | AUT | NDB GBG ?? probably intermodulation, true freq = 426 kHz ?? | Gleichenberg | |||
| 198 kHz | 30 | G | BBC4 | Droitwich | |||
| 225 kHz | 40 | POL | Jedynka | Solec Kujawski | |||
| 252 kHz | 10 | ALG | Chaîne 3 | Tipaza |