Random reception of Voice of Greece on a single freq.9420 kHz, Sept.24

GREECE   Random reception of Voice of Greece on a single freq.9420 kHz, Sept.24:
1755&1900 on  9420 AVL 170 kW / 323 deg to WeEu Greek tx#3 & no signal at 1915UT
from 1945 on  9420 AVL 170 kW / 323 deg to WeEu Greek tx#3 was back again in air