R.Sultanate of Oman, good in Arabic, distorted in English, August 13

OMAN   R.Sultanate of Oman, good audio in Arabic, distorted in English on August 13:
1400-1500 on 15140 THU 100 kW / 315 deg to WeEu Arabic, good audio & good modulation
1500-1600 on 15140 THU 100 kW / 315 deg to WeEu English, bad audio & weak modulation
1600-2200 on 15140*THU 100 kW / 315 deg to WeEu Arabic, good audio & good modulation
* NO SIGNAL  15140 DEL 250 kW / 312 deg to EaEu Russian All India Radio 1615-1715UT:
https://www.youtube.com/watch?v=VJFQjLCCh08&feature=youtu.be
https://www.youtube.com/watch?v=vW_wWDz5z68&feature=youtu.be
https://www.youtube.com/watch?v=ouW6lvYRYrY&feature=youtu.be
https://www.youtube.com/watch?v=B5L71tjLHwE&feature=youtu.be