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Author Topic: UNID [Pyongyang Broadcasting Station?] 6400 kHz AM 2210 - 2235 UTC 22 Mar 2018  (Read 989 times)

Offline R4002

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Heard very strong test tones, sometimes peaking above S9, unmodulated carriers with obvious power level variation (literally watching the S-meter move around) and other testing on 6400 kHz 6.400 MHz this evening.  I know Pyongyang Broadcasting Station (PBS Pyongyang, Pyongyang BS) in North Korea/DPRK uses this frequency for shortwave broadcasting and its unlikely another station was the one responsible for these tests. 

The other possibility was a jammer station doing tests, however no ID or voice modulation of any type was heard.  Each transmission was around 30 seconds long and for 10 minutes or so it was almost a constant 30 seconds on 30 seconds off type deal. 
U.S. East Coast, various HF/VHF/UHF radios/transceivers/scanners/receivers - land mobile system operator - focus on VHF/UHF and 11m

Offline MDK2

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It's been weeks since I last saw even a trace carrier at 6400, and some folks I know in anther forum, who copy that one better that I ever have, reported it missing. I have seen a mode right on top of that frequency at time, STANAG 4285 I believe (I'm no expert but that's what it looked and sounded like) during the hours I'm most likely to catch it, but these Europe based listeners have not copied that at all. Perhaps what you heard was from the same parties responsible?

EDIT 03/23/18 1245 z - Just before dawn in my QTH, the best time for Asian signals for me. No STANAG or anything else on 6400, and no broadcast either. I think this one is off the air, at least temporarily.
« Last Edit: March 23, 2018, 1247 UTC by MDK2 »
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Offline shadypyro

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Hi, i am on the South Korea SDR and the test tones for PBS Pyongyang has just came off and right now there is a carrier, seems Uncle Kimmy put it back on.
Tecsun PL-880, MLA-30 plus loop antenna. Various sdrs.

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Offline Ron - Calif.

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Yes, 6400 kHz. had been silent for quite some time.

March 28, was first day back again at 1120 UTC and // 3320 kHz, which is heard daily.

Ron, listening at Asilomar State Beach (near Monterey), California


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