Reception of S11a Cherta on 5149 kHz, August 21

NUMBERS STATION   S11a Cherta on 5149 kHz via SDR Szekesfehervar HNG on August 21:
0830-0833 on  5149 unknown secret tx site to Eu Russian USB mode, very good signal
https://www.youtube.com/watch?v=UXNS7xc2bw0&feature=youtu.be
https://www.youtube.com/watch?v=GjETM4n_GMc&feature=youtu.be