US-9, УС-9 receiver like BC348. LZ contest, OT7Q, PB37EUDXF, LZ1AA, YO5PVZ, YO6EL, IK3UNA, F5MNC. 

US-9 receiver. Like BC 348. What's inside? LZ contest, OT7Q, PB37EUDXF, LZ1AA, YO5PVZ, YO6EL, IK3UNA, F5MNC.
Made in USSR Aircraft radio receiver US-9 “Solovej” is based on the US receiver BC-348N.
some information from RA3DAK website:
9 lamp medium-shortwave receiver, almost an exact copy of the American RCA BC-348 (AN / ARR-11) airborne receiver, which was installed, in particular, on B-29 bombers and on Catalina flying boats supplied to the USSR.