Hi, it looks like the Moscow cluster beacon "C" had a hickup, or...... 13528 kHz, 0648-0657 UTC. Starting at the minute "C", then at ca 28 sec it changes to "CK CK CK CK CK TNC TNC TNC TNC TNC" for about 20 seconds and then returns to "C". This was repeated every minute till 0657 UTC. There is a sample on the N&O website at http://home.luna.nl/~ary/ Ary Boender