The 'Air Horn'

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The "Air Horn"
Przechwytywanie.PNG
Frequencies 4.93 MHz
Frequency Range 4.93 MHz - 4.93 MHz
Mode USB
Modulation
ACF
Emission Designator
Bandwidth 7 kHz
Location Smolensk, Russia
Short Description "The Air Horn" is a Russian military commandment network serving the Western Military District, which also serves the same purpose as the buzzer. It was first heard in 2017, broadcasting on 4020 kHz. 2 years later, in 2019, it changed to broadcast instead on 4070 kHz (for about 2 months). A few months later, it was temporarily active on 3510 kHz, before moving permanently to 3510 in October 2019. In December 2019, the channel marker broke down, and remained inactive until January 2020, broadcasting back on 3510 kHz. In September 2022, it moved to 4930 kHz, while broadcasting its first known voice messages almost a week after. After December 2023, the channel marker was replaced by The Goose's channel marker. It has not been heard since most likely December 2023 or very early 2024. The stations' last message was broadcasted in July 2023.
I/Q Raw Recording
Audio Sample

Website for Proof of sample and concept:[edit]

https://priyom.org/military-stations/russia/the-air-horn

Samples[edit]