Re: [IRCA] 1566 jamming from Korea North

[d1028gary@xxxxxxxxxxx]

<<< Very much from the sidelines, it seemed to me that North Korea, not China, as Gary has been assuming, would be the source of jamming upon FEBC 1566. 
Thread from a different source, WTFDA-AM, seems to confirm this altho does not deal with the jamming being limited to the half-hour Japanese service: 

73, Glenn Hauser >>> 

Glenn, the correspondence I had with Chris Kadlec (who has now returned to the USA) was concerning a completely different type of 1566 kHz jammer which showed up on HLAZ's frequency around April of 2015, broadcasting Chinese programs in an obvious effort to interfere with reception of HLAZ in the target area. Investigation of this 1566 Chinese station by Mauno Ritola and others (some of whom were in east Asia) led to the conclusion that the interfering station was located in Yanbian, China, close to the Korean border. This was their conclusion, not mine (although I had a personal interest in this 1566 Chinese station, apparently having heard it, along with Japanese DXers, when it first came on the air in April of 2015). 

The new 1566 kHz pulse jammer has a completely different sound signature, and appears to be some type of test transmission of limited power. The signal is a pulsing tone of approximately 700 Hz every two seconds, and has only been heard by a few DXers in North America and east Asia (presumably because of the very limited broadcast time from 1230-1300 UTC, when it cannot be received in Europe). It was first noticed here around September 20th, after Chris had already returned back to Massachusetts. An MP3 of the pulsing tone on 1566-HLAZ's Christian service at 1254 UTC on September 24th is posted at https://app.box.com/s/gm78l03yw105533ewwaocf42qzur08l9 

73, Gary DeBock (in Puyallup, WA, USA) 

----- Original Message -----

From: "Glenn Hauser via IRCA" <irca@xxxxxxxxxxxxxxxx> 
To: "IRCA" <irca@xxxxxxxxxxxxxxxx> 
Cc: "Glenn Hauser" <wghauser@xxxxxxxxx> 
Sent: Saturday, October 1, 2016 7:46:27 PM 
Subject: [IRCA] 1566 jamming from Korea North 

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