Hello Lubos,

>> The propagations are not bad, I am listening BBC World Service on 648kHz 
>> very well. <<

I suppose this is to be expected, as they run 3 MW ERP beaming into
Europe with a five element vertical array. In the morning a second
transmitter on 1296 kHz is on air using a 2 x 3 element vertical array.
At 190 km distance they produce both a -15 dBm signal, which I use for
off air IMD tests of active antennas.
The tramsmitters are phase locked as with a poor IMD device I can
listen to both stations at 1944 kHz.
It sounds like they are talking at the same time, but no beatnote
whatsoever.

73,
Roelof bakker, pa0rdt