Radio Caroline now on 648kHz

I can hear it, but no good reception here :(

PS. Now on Sunday I can hear the signal all day, even good reception about at 15-16 UTC.
Receiver SDR-IQ and 1,2km wire.

Audio sample here: http://www.mediafire.com/file/b2qbmv6fm2wntu9/648kHzCaroline12112017at1600UTC.mp3