Russians 2950 to 3150 AM, 0245 UTC 04 APR 2024

[n2avh]

9 different conversations going on, all AM, some on nice round frequencies like 3130 others on odd ones like 3017. On Arvika, Sweden SDR. Seems to be their CB band, legal or (more likely) not.

[kris]

This is the 3MHz aviation band, so it cannot be legal for free banders.
 Russians and Ukrainians use them very much in the evenings, calling them "TROIKA".
The band starts at around 2900 where USB works, and above 3 MHz only AM. As ID they use popular words such as: pike, captain, dynamo,budilnik, priboj.
They sometimes play music, e.g. the station Brittany from Odessa UA, Mirage from Tambov.
They exchange reports and technical notes, sometimes one of them organizes a "collective". 
They do not talk about politics or provide contact details - they only invite people to communicate via radio.
They use "home-made" ones called "scharmanka" or high-power military surplus transmitters - ugly, wide modulation, imprecise tuning, unstable carrier.
Sometimes some of them emit a very strong second harmonic, heard by me at about 6.3 MHz in the "European" band of the Free station.

[n2avh]

Thanks Kris, very interesting!