Category Archives: VLF

Video: Frans compares the GRAHN GS5 SE – VLF2 with a large loop antenna

Many thanks to SWLing Post contributor, Frans Goddijn, who shares the following note and video originally posted on his blog:

Mr Grahn of https://www.grahn-spezialantennen.de/ had to stop working for a couple of months (medical reasons) but now he is back and I was able to get one of his highly sensitive Very Low Frequency modules to fit on my Grahn GS5-SE antenna tuner.

As before, the delicate device (“treat like glassware, do not throw”) was extremely well packed for its safe and intact arrival.

Click here to view on YouTube.

Click here to view Frans’ post which includes additional photos. 

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Live video of startup, tuning, and transmitting from Alexanderson Alternator SAQ

Hats off to the crew at the UNESCO World Heritage Grimeton Radio Station!

Today is Sunday July 4, 2021. Besides being Independence Day here in the States, it’s also Alexanderson Day in Sweden!

This morning, I discovered a video on the Grimeton Station YouTube channel: a recording of their live stream live stream starting around 08:30 UTC today.

In the video, you can watch the crew of the Grimeton station startup, tune, and transmit on their 1924  Alexanderson Alternator with the callsign SAQ. Their message is sent in CW on 17.2 kHz. The video is absolutely fascinating and I highly recommend watching it. The startup and tuning procedure are simply amazing. I can only imagine the dedication and resources it takes to keep this marvel of 1920s engineering fully functional today:

Click here to watch on YouTube.

Happy July 4th, everyone!

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New Space Weather from VLF Communications

Image Credit: NASA

As an amateur astronomer & SWL enthusiast, I always find it interesting when both disciplines overlap.  I came across an article on the Internet posted by sciencealert.com of such an overlap.

The Earth is surrounded by two radiation belts (Van Allen Belts).  But something strange has been discovered.  After NASA launched a space probe in 2017 – and after analyzing collected data – the two Van Allen belts have been pushed farther away from Earth by a third “area”.  That area is a “man-made barrier” created by Very Low Frequency (VLF) radio communications.

Scientists postulate this new man-made VLF barrier, a form of man-made Space Weather, has pushed the two radiation belts farther from Earth.  And as such, this has created a “protective bubble” from potentially dangerous solar discharges and their radiation streams.

For those interested, you can read the full article here..

Guest post by Troy Riedel

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Grimeton Radio / SAQ Transmission on Sunday, July 5, 2020

(Source: SAQ via Mike Terry)

The annual transmission on Alexanderson Day with the Alexanderson Alternator on VLF 17.2 kHz with the call sign SAQ will take place Sunday, July 5th, 2020.

Two transmissions are scheduled as follows:

Startup and tuning at 10:30 (08:30 UTC) with a transmission of a message at 11:00 (09:00 UTC).

Startup and tuning at 13:30 (11:30 UTC) with a transmission of a message at 14:00 (12:00 UTC)

Watch both transmission events live on our YouTube Channel.

QSL-reports to SAQ (please no E-mails) are kindly received via:

  • Reception report form
  • or via: SM bureau
  • or direct by postal mail to:

Alexander Association
Radiostationen
Grimeton 72
SE-432 98 GRIMETON
S W E D E N

The Amateur Radio Station with the call “SK6SAQ” will be QRV on the following frequencies:

  • 7.035 kHz CW or
  • 14.035 kHz CW or
  • 3.755 kHz SSB

QSL-reports to SK6SAQ are kindly received via:

  • Email to info@alexander.n.se
  • or via: SM bureau
  • or direct by postal mail (see address above)

Two stations will be on the air most of the time.

Due to the Corona pandemic, there will be no visitors to the radio station and there will be no visitor activities. Instead you can watch both transmission events live on our YouTube Channel. The association will try to carry out the two broadcasts to the world from the old Alexanderson alternator SAQ with minimal staffing in place.

World Heritage Grimeton Radio station and The Alexander Association

For further details, se grimeton.org or alexander.n.se

Alexanderson Day 2020

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SAQ Grimeton to transmit on UN Day: October 24, 2019

(Source: Southgate ARC)

Join us in celebrating UN Day on October 24 at the World Heritage Grimeton!

This year, hundred years have passed since equal voting rights for men and women were introduced in Sweden. It is a human right that everyone can make their voices heard in fundamental issues and is prerequisite for creating a democratic and peaceful society.

On this occasion, we want to raise the power of women in peace issues. Therefore the organization Acting 4 Change, that works with the project  womens empowerment in Casamance in Senegal, is invited to talk about women’s participation in the peace process from a Senegalese perspective.

During the evening, a peace message is sent with the old long-wave transmitter SAQ and finally we listen to Senegalese rhythms performed by Kilimandiarou.

The event is held in the radio station building with free admission.
Arrive at the event on time, as there is a limited number of seats.

Tonight’s program 6 pm – 8 pm

Welcome – CEO Grimeton World Heritage, Camilla Lugnet

Women’s Participation in the Peace Process – Women’s Empowerment in Casamance – President Acting 4 Change, Linda Ohlsson*

The long wave transmitter is started – President Alexander GVV, Jan Steinbach

Peace message sent ** (17.00 UTC)

Concert with Kilimandiarou Welcome to an evening of signs of community and peace!

* More info about Acting for Change can be found here www.actingforchange.org

The arrangement is made possible with the help of project funds from Varberg Municipality.

More information about the transmission
The transmission is on 17,2 kHz CW.
Startup of the transmitter around 16.30 UTC
Transmission of a message at 17.00 UTC
You can also watch a live video stream of the transmission on www.alexander.n.se.

No QSL-cards will be given this time and no List of Reports will be constructed but we accept shorter Listeners Report to e-mail info@alexander.n.se.

*The world heritage site Grimeton is a living cultural heritage. All transmissions with the long-wave transmitter SAQ are therefore preliminary and may be cancelled with short notice.

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SAQ receives 438 listener reports

Grimeton VLF mast

(Source: Southgate ARC)

Alexanderson Alternator station SAQ says it received 438 listener reports — ‘an incredible amount’ — for its June 30 Alexanderson Day transmissions from Sweden including 8 ‘super’ DX reports, five from the USA and three from Canada.

The historic electro-mechanical transmitter, which dates back to the 1920s, is fired up periodically throughout the year on 17.2 kHz.

“We are very thankful for all your enthusiastic and positive feedback, with images, recordings, videos, and even Morse ink writer strips,” SAQ said.

The station is a World Heritage Site in Grimeton, Sweden and SAQ’s June 30 message commemorated the 100th anniversary of the first east-to-west transatlantic voice transmission from the Marconi station in Ireland to Cape Breton Island, Nova Scotia.

SAQ has posted an interactive map showing the locations of all received listener reports from recent transmissions and video of the Alexanderson Day transmission event has been posted to its YouTube channel.

https://www.youtube.com/user/AlexanderSAQ/videos

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SAQ’s 17.2 kHz Christmas Eve transmission

(Source: ARRL News via Ron)

Alexanderson alternator in the SAQ Grimeton VLF transmitter.

Sweden’s Alexanderson alternator station SAQ has planned a Christmas Eve transmission on 17.2 kHz. The transmitter will be tuned up starting at around 0730 UTC, and a message will be transmitted at 0800 UTC. The 200 kW Alexanderson alternator is an electromechanical transmitter dating back to 1924.

The event will be streamed live on the Alexanderson site YouTube Channel. Listener reports are invited via email or direct to Radiostationen Grimeton 72, SE-432 98 Grimeton, Sweden. Amateur Radio station SK6SAQ will be active on Christmas Eve on 7,035 and 14,035 kHz on CW, or on 3,755 kHz on SSB. Two stations will be on the air most of the time.

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