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SAQ Reception at -140dB in London on World Radio Day, Feb. 13th 2023

The theme for the 12th edition of the World Radio Day to be celebrated on February 13th 2023 is "Radio and Peace".SAQ is therefore scheduled to be on air, to send out a peace message to the whole world, using the unique 200kW Alexanderson alternator, from 1924, on 17.2 kHz CW



Receiving SAQ station on 17.2kHz. Weak signals between -120dB and –130dB.

To commemorate the UNESCO 50th anniversary, World Heritage Grimeton Radio Station has scheduled SAQ to be on the air at 17:00 CET (16:00 UTC) on Wednesday, November 16th, 2022, to send out a peace message to the whole world, using the 200kW Alexanderson alternator from 1924, on 17.2 kHz CW.


SAQ Transmission on 4 July 2021

  The annual transmission event on the Alexanderson Day with the Alexanderson Alternator from 1924 on VLF band 17.2 kHz mode CW with the call sign SAQ, on 4 July 2021. Recorded in London on 4 July 2021. Strong signal, 5-9  

Station equipment:

- Long Wire antenna.
- Longwire Antenna Impedance adapter ; HST-210N ;Heros Technology
- Antenna Galvanic Isolator HS-100B; for local noise suppression; HerosTech
- VLF-LF-MF up converter HerosTech HS-400, IF output 4MHz-4.5MHz.; HS-400
- Flexradio1500 as IF receiver,
- GPS reference clock from Leo Bodnar
- Power SDR 2.8.0 from KE9NS




"Alexanderson Day" 01/July/2018

Receiving station set-up: Antenna: Long wire. Receiver: FlexRadio 1500 & VLF-LF Up-Converter model 400 from Heros Technology. Station location: West London.


SAQ station testing on 17.2kHz before the annual transmission on "Alexanderson Day" 01/July/2018.
Notice the frequency drift around 17.2kHz while calibrating rpm of the alternator generator.



The annual transmission on "Alexanderson Day" with the Alexanderson alternator on VLF 17.2 kHz. Callsign "SAQ". July 1st, 2018.


  Receiving in London SAQ station special transmission, 17.2kHz on 16th August 2016
using 1m pole length active antenna
  Active antenna Zoom Receiving SAQ  

Experimental active antenna
1m in lenght pole.
Mounted at 4m from ground.
(click to enlarge)

Receiving station in London set-up diagram
(click to enlarge)
Receiving SAQ station on 17.2 kHz. 35dB over noise.
(click to enlarge)

SAQ Special transmission on 17.2 kHz on occasion of the 11th Nordic Shortwave Conference on 16th August 2016.
Reception station located in West London.



G0MRF WSPR (whisper) beacon project


David Bowman G0MRF WSPR (whisper) beacon project. Inaugural transmission on MF band 475.769 kHz. 06 March 2016



United Nations Day celebration


Special Transmission on 17.2 kHz. VLF band from SAQ radio station, Grimeton, Sweden. October 24th 2015


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