Type : receiver
Frequency band: 1 - 10 MHz covered by 6 sub-ranges
Modulation : AM, CW
Sensitivity : AM range 1 - 5 <= 4,5 microV
6 <= 6 microV
CW range 1 - 5 <= 1,5 microV
6 <= 2 microV
Power supply : own power supply 127V, 220V / 50 Hz
Construction : tubes, 15 pcs, type : 2Ж27Л
Documents collection (503 kB) : R-251 schematic
More photos : More R-251 radio photos
The receiver types R-251, R-252 and R-310 basically they are one family, very similar to each other even in their construction, the most significant difference is their working frequency range.
R-251 : 1.0 - 10.0 MHz
R-252 : 0.075 - 2.0 MHz
R-310 : 1.5 - 25 MHz
R-252 : 0.075 - 2.0 MHz
R-310 : 1.5 - 25 MHz
