Frequency change of VOA Learning English via Udorn, June 25

USA(non)   Frequency change of VOA Learning English via Udorn, June 25
1130-1200 NF 12030 UDO 250 kW / 304 deg to SEAs English, good, x 12020
1130-1200 on 15715 PHT 250 kW / 283 deg to SEAs English, good signal
1130-1200 on 17790 PHT 250 kW / 283 deg to SEAs English, weak signal
https://www.youtube.com/watch?v=rT6MMFXHmDA&feature=youtu.be
https://www.youtube.com/watch?v=MenLaMuC3po&feature=youtu.be