Manufacturer : Radioindustrija Zagreb ( RIZ ) Type : RU 3 / 57 Produced : 1957 - formel Yugoslavia ( rep. Croatia ) Frequency range : MW Receiving mode : direct - reflex Tubes : UAF42, UL41, UY42 Speaker : internal dynamic 4 ohms impedance speaker Power supply : 220V, 50Hz Receiving estimation (1-10) : 8 Global estimation (1-10) : 7 Specials : built in shortly wire antenna        - device was cased in high quality plastic case Note : radio was designed as low cost device mostly used          Philips el. parts