Re: [IRCA] Saturdays highlights - TP DX in Seattle

[Chris Kadlec <beaglebass@xxxxxxxxxxxxxx>]

Just wanted to chime in on this one. I never heard a buzz on the Chongjin transmitter. It's always been a clear signal, so it could be your tech stuff (of which you know everything about and I know nothing). It's been two years, but here's one of numerous recordings of 621 I have from 330 miles out. This one was taken atop a skyscraper in downtown Seoul; the signal is airing its nightly Pyongyang Broadcasting programming. Anything could have changed since, but generally, their signals have improved with time as they've dumped more resources into the broadcasting efforts or budgets. Unlike Pyongyang, which is 100 miles to the north, and Haeju right across the water, 621 was pretty rare to hear by groundwave. The only stations of that distance that were typical were Fukuoka ones now and then. But VOK programming comes from the same transmitter.

http://www.beaglebass.com/temporary/621_Chongjin.MP3

-Chris Kadlec
 Seoul AM Radio Listening Guide



Date: Sun, 7 Oct 2018 10:17:23 -0700 (PDT)
From: Gary DeBock <d1028gary@xxxxxxxxxxx>
To: Mailing list for the International Radio Club of America
	<irca@xxxxxxxxxxxxxxxx>, Nick Hall-Patch <nhp@xxxxxxxx>
Subject: Re: [IRCA] Saturdays highlights - TP DX in Seattle

Nick and Bruce,

<<<  >621    UNID, dreamy vocal song 1356 good but soon faded, possibly DPRK
 If you still have the recording Bruce, could you check the frequency 
> offset?   The wall to wall ballads seemed to be pretty much spot on 
> the channel here, though there was also a carrier ~40Hz low, which 
> seems to be where DPRK resides.  But if I set the BFO to demodulate a 
> signal 40Hz low, I got a buzz on the music, not a better signal.   >>>

The 621-VoK transmitter (used for NK's Japanese service) has a notorious buzz on its signal. This was its degraded audio last December in Kona, Hawaii, most obvious around the 45 second point  https://dreamcrafts.box.com/s/rhfksf381csgtohluxt3e97tjf79fshm

Gary
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