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Loggings => Utility => Topic started by: Perseus68 on December 06, 2020, 2200 UTC

Title: The Siren or Alarm sound at 4770KHz
Post by: Perseus68 on December 06, 2020, 2200 UTC

Quite well audible those nights, at least from my QTH (canary islands).
It was already known from the SDR of Twente (The Netherlads)
I grabbed a couple of videos just in case your are interested.

https://youtu.be/o1le0EfnDjI

https://youtu.be/TDJBvGg7pto

Gear: SDRPlay-RSP1 + SDRUno + Home-made 1m diameter active Loop

Title: Re: The Siren or Alarm sound at 4770KHz
Post by: Teotwaki on December 19, 2020, 0239 UTC

Thanks for recording that! It is very fascinating!

Title: Re: The Siren or Alarm sound at 4770KHz
Post by: jasmine on January 08, 2021, 1250 UTC

Quote from: Perseus68 on December 06, 2020, 2200 UTC

Quite well audible those nights, at least from my QTH (canary islands).
It was already known from the SDR of Twente (The Netherlads)
I grabbed a couple of videos just in case your are interested.

https://youtu.be/o1le0EfnDjI

https://youtu.be/TDJBvGg7pto

Gear: SDRPlay-RSP1 + SDRUno + Home-made 1m diameter active Loop

This is "The Alarm"

Thought to be used by the Russian Army Western Military District:  https://priyom.org/military-stations/russia

More info here: https://priyom.org/military-stations/russia/the-alarm