EKB receiver was produced by the GDR for the army, police and border guards. In the years 1960-1967, when production went full steam, was so closely guarded that the data on it reportedly can not penetrate to the West. Polish Army struck in the late 60s as an alternative to R-311 receiver, relatively quickly was replaced by receivers R-326.

The design of the receiver has been designed as so-called. a hybrid that is used in the 7 miniature lamps type: DF669, DF668 and DF97 (pentode with variable slope characteristics) and 9 transistor: OC811 and OC821. Superheterodyne receiver of the double conversion intermediate frequency had 900 and 32 kHz, and covers the range from 1.5 to 22 MHz in the six sub-ranges. Power supply 1.2 V and 7.2 V is done with a battery pack nickel-cadmium. Receiver weight was 13 kg.