4380 USB heard day by day on sun light houers. Russion lang. man live voice, uses the phraseology directing military flights.
Only one way messages gives every few minutes - wait patiently.
In the background you can hear conversations second operators, and phone ring, but I didn't faind another frq.
SINPO 4,4,4,4,4 Signal strange S8 it lets you use ATT and SQL.
Reception is stable all day - I think the station is located in Kaliningrad area.