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- Subject: 1566 jamming from Korea North
- From: Glenn Hauser <wghauser@xxxxxxxxx>
- Date: Sun, 2 Oct 2016 02:46:23 +0000 (UTC)
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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
Heck, the signal isn't even that clear in Seoul, but then it's got 1566 Pyongyang and Yanbian that destroy it. It was always clear last fall, but then when Pyongyang came back on and then Yanbian as well (both were off for an extended time), it was pretty much useless, though it depended on which way HLAZ was aiming. They were typically strongest with Chinese programming at night as well as the Russian programming. And it does sound like the most faintest hint of Pyongyang heard under HLAZ there. It could be just in my head, but the pattern of that background noise behind HLAZ just has that familiar sound to it (Chris Kadlec, Seoul, Korea, Sept 23, WTFDA-AM Forum via DXLD)
Gary and I have spoken lots since he wrote that. He was mistaken, using information from another person who was mistaken as well since nobody was DXing locally from on the ground as I was.
The signal was originally assumed to be from Yanbian, but I disproved that when Yanbian's signals all came back on the air suddenly after a good 6 months off the air. Now, Yanbian People's Radio was on 1566 clobbering Jeju while the jammer was interfering with both of them. Since the jammer was assumed to be coming from Yanbian... yet Yanbian was... coming from Yanbian, that logic doesn't fly.
Instead, the 1566 jammer is almost certainly originating from the tower site in Anak, North Korea. It's a laser jammer that is // 1467 Pyongyang (Anak), as I've shown in some clips in the past
http://www.beaglebass.com/dx/external/Jammers_1467_1566.MP3
(1566 vs. my local 1467 Pyongyang jammer), though it is harder to hear the laser tone on 1566 with the other signals there, but it is parallel.
Meanwhile, this is what 1566 sounds like in Seoul now.
http://www.beaglebass.com/dx/external/Seoul_1566.MP3
Jeju (stronger Chinese) is 279 miles to the south, the jammer is 85 miles to the north, and the weaker Chinese is Yanbian, 390 miles to the north. Both the jammer and Yanbian had been off the air for quite some time, so Jeju was a solid signal prior to that, but at times the frequency is unlistenable now.
The jammer on 1566 runs all night from before skywave even starts until it disappears sometime in the early morning (perhaps when skywave ends). It blocks Jeju's Russian, Japanese, Chinese, Korean, etc. programming, so it's targeted basically as a 24/7 station to wipe it out. As you probably know, religion is banned in North Korea and that's what FEBC is. The only thing that they block more is KBS 1 (Chris Kadlec, Sept 29, ibid.)
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