The R311 receiver (Hungarian made) is a communication receiver designed for receiving centres. In our country it was also called "Hungarian Lambda". Its characteristics were similar to Lambda IV. It was not very popular, had low tuning accuracy and stability.
Range 0,1 to 30 MHz
A1, A2, A3 operations
A1 sensitivity better than 3 uV, A3 up to 7.5 uV
Antenna rod 1.5 and 4 m, slant beam 12 m
Power supply 100, 110, 190, 220 V 50 Hz, or 12 V battery
Dimensions 490 x 300 x 315 mm
Weight 28 kg
Source: Spoj-51-7 and own collection
Range 0,1 to 30 MHz
A1, A2, A3 operations
A1 sensitivity better than 3 uV, A3 up to 7.5 uV
Antenna rod 1.5 and 4 m, slant beam 12 m
Power supply 100, 110, 190, 220 V 50 Hz, or 12 V battery
Dimensions 490 x 300 x 315 mm
Weight 28 kg
Source: Spoj-51-7 and own collection