The signal has been received on
5th of August 2019 from 05.20 till 05.40 UTC on
16020 kHz approximately:

Here is a short audio recording made in USB mode:
http://ulx2.byethost24.com/wp-content/uploads/2019/08/UNID_16020.mp3The most similar mode in Sigidwiki base is
CIS 3x100 VFT but it is marked as inactive.
The station seems to be active daily from about 05.00 UTC. Results of TDoA analysis point to Irkutsk environs (russia).