A few months back there was a discussion on the list about the transmitted 
audio from the 621-Pyongyang BS/ Voice of Korea station in Chongjin, N. Korea-- 
specifically, whether there was audio hum on the frequency from a bad 
transmitter, or whether the bad audio was caused by a drifting frequency.

     Yesterday morning a recording was made of 621-Pyongyang BS mixing with 
621-China (Heilongjiang) at the 1500 TOH, with the two sets of pips loudly 
overlapping at the 39 second point  
https://dreamcrafts.box.com/s/612kbk25hqqlxh1r4qfzaxzeuuwktbeo

The throbbing hum from Chongjin's transmitter is pretty obvious, distorting not 
only the Pyongyang BS audio but also covering Heilongjiang's clean signal. The 
overlapping time pips from the two are in the same bizarre league as the 
"Cuckoo Clock" overlapping pips from 918-Shandong and RNZ at 1700 UTC in the 
Cook Islands.


Gary DeBock (DXing in Poipu, Hawaii)


 
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