The film presents, the idea how to add a VHF-FM receiver module to Radio Mazur from 1954 (before II world war - Pionier). Using the switch of waves you can select the following ranges: LW, MW, SW and UKF-FM (in the position: Gramophone). You can hear 6 UKF-FM public stations, which are pre-programmed. UKF-FM stations are swiched using the buttons on the panel on the back of the receiver. The receiver looks like the original - the modernization is not visible.
The modifications are visible on the back side of the Radio:additional FM antenna socket and panel to switch the FM channels using buttons: Next and Prev.
The original Radio has been build in 1954 and use two lamps ECH21, one EBL21 and one AZ1.
The audio/voice modul works on the second half of the second from left ECH21 lamp as pre-amplifeir and and on the ECH21 lamp as audio power anmplifer.
The diagram od original Mazur Radio was published in the Radioamatior March 1954.

More technical and programming details you can find in the next video.