Poor signal of KBS World Radio on 9645 & 9880 kHz, May 17

SOUTH KOREA   Poor signal of KBS World Radio on 9645 & 9880 kHz, May 17
1255-1300 on  9645 KIM 100 kW / 319 deg to CeAs KBS WR Interval Signal
1300-1400 on  9645 KIM 100 kW / 319 deg to CeAs Russian KBS World Radio
1355-1400 on  9880 KIM 250 kW / 264 deg to SoAs KBS WR Interval Signal
1400-1600 on  9880*KIM 250 kW / 264 deg to SoAs English KBS World Radio
* co-ch same  9880 NNN 100 kW / 200 deg to SEAs Khmer CRI 1400-1600UTC,
* co-ch same  9880 XIA 500 kW / 292 deg to CeAs Russian CRI from 1500UT
https://www.youtube.com/watch?v=Y64xD3HB-6M&feature=youtu.be
https://www.youtube.com/watch?v=ZgTxm2H2BLY&feature=youtu.be
https://www.youtube.com/watch?v=4Bcpl1ziMsI&feature=youtu.be
https://www.youtube.com/watch?v=_b-9Wm4Qx70&feature=youtu.be