It's pretty clear that the N. Korean is on the low side in that list. For me, the first clue that it was not N. Korea that was being heard was that the carrier on the low side was relatively weak compared to the dominant.
best wishes, Nick At 09:39 2018-10-11, Mauno Ritola wrote:
Hopefully the spectrogram via a South Korean remote rx comes through via the other list. I think it is 2 Hz on the high side.The carrier on the low side drifts quite a bit: between 620.95-.965 kHz. If it is one of the dozen Heilongjiang transmitters, it is on 24h. Acc. to WRTH they have programming until 1800.North Korean signal quality and strength seems to vary a lot. It has an audio defect sounding like bubble jammer, when listened to in SSB. It seems to be on 24h. Today at 0930 the audio is very distorted.Mauno Chuck Hutton kirjoitti 8.10.2018 klo 0:47:In my spectrogram, it's not a bunch of discreet tones but rather a "smeared" single tone as would be seen with a slightly unstable carrier. It looks like the carrier suffers from jitter.I'd attach a picture of the spectrogram but then my post would get rejected.. Chuck ________________________________From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of Nick Hall-Patch <nhp@xxxxxxxx>Sent: Sunday, October 7, 2018 2:18 PM To: Gary DeBock; Mailing list for the International Radio Club of America Subject: Re: [IRCA] Saturdays highlights - TP DX in Seattle There are a mess of tones around 40 Hertz on your audio recording Gary, plus another around 45Hz. Interesting that they should correspond to the offset of N. Korea on that channel. The Korean carrier itself may not be very clean....but for the listener, it's not easy to determine what of a hum is due to offset from the Chinese (or ?) on the same channel and what is due to audio that the station is broadcasting. I figured however that when your Korean audio was strongest, the hum was weakest, which would seem to indicate that the hum wasn't part of the broadcast. best wishes, Nick At 20:22 2018-10-07, Gary DeBock wrote:Hmm, interesting, Nick. It seems like our Japanese friends also made some remarks about the buzzing hum of 621-VOK, though-- or maybe it was Chris Kadlec? GaryOn October 7, 2018 at 10:46 AM Nick Hall-Patch <<mailto:nhp@xxxxxxxx>nhp@xxxxxxxx> wrote: Thanks Gary, I think the buzz might actually be the 40Hz "hum" from the offset in both our cases, as your "buzz" only shows up as the audio weakens. So, perhaps not part of the distinctive programming, hi. best wishes, Nick At 17:17 2018-10-07, Gary DeBock wrote:Content-Transfer-Encoding: 7bit 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 frequencyoffset? 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>https://dreamcrafts.box.com/s/rhfksf381csgtohluxt3e97tjf79fshmGaryOn October 7, 2018 at 8:10 AM Nick Hall-Patch <<mailto:nhp@xxxxxxxx>nhp@xxxxxxxx> wrote: At 06:22 2018-10-07, Bruce Portzer wrote: Today's report will be very abbreviated, focusing on the really goodstuff. I was gone all day and by the time I got home, TA's were starting to come in for the first time this season. So I had limited time for listening to the SDR recording of what was obviously an impressive morning. Anyway, there's probably more to be reported if I can find the time to dig through the files. 621 UNID, dreamy vocal song 1356 good but soon faded, possibly DPRKIf 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 ballads were back this morning also (a much more sedate morning, whew), but, whoever it is, doesn't seem big on talk. 675 VIETNAM, 1359 woman in Vietnamese, then chime IS and pips at ToH (both matching what was heard at 0500 on the Vietnam Kiwisdr receiver). After the pips there was rousing march music. The ID, if any, was tooweak to copy, but everything else matches perfectly I'll have to dig more deeply on that one, as I was hoping for Vietnam, but couldn't hear the chimes at first listen. best wishes, Nick Nick Hall-Patch Victoria, BC Canada _______________________________________________ IRCA mailing list <mailto:IRCA@xxxxxxxxxxxxxxxx>IRCA@xxxxxxxxxxxxxxxx http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those ofthe original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officersFor more information: <http://www.ircaonline.org>http://www.ircaonline.orgTo Post a message: <mailto:irca@xxxxxxxxxxxxxxxx>irca@xxxxxxxxxxxxxxxxNick Hall-Patch Victoria, BC CanadaNick Hall-Patch Victoria, BC Canada_______________________________________________ IRCA mailing list IRCA@xxxxxxxxxxxxxxxx http://montreal.kotalampi.com/mailman/listinfo/ircaOpinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officersFor more information: http://www.ircaonline.org To Post a message: irca@xxxxxxxxxxxxxxxx _______________________________________________ IRCA mailing list IRCA@xxxxxxxxxxxxxxxx http://montreal.kotalampi.com/mailman/listinfo/ircaOpinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officersFor more information: http://www.ircaonline.org To Post a message: irca@xxxxxxxxxxxxxxxx_______________________________________________ IRCA mailing list IRCA@xxxxxxxxxxxxxxxx http://montreal.kotalampi.com/mailman/listinfo/ircaOpinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officersFor more information: http://www.ircaonline.org To Post a message: irca@xxxxxxxxxxxxxxxx
Nick Hall-Patch Victoria, BCCanada
_______________________________________________ IRCA mailing list IRCA@xxxxxxxxxxxxxxxx http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: irca@xxxxxxxxxxxxxxxx