Is the MW offset list at https://www.mwlist.org/mwoffset.php?khz=621
no longer accurate then Mauno?
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-boun...@hard-core-dx.com> on behalf of Nick
Hall-Patch <n...@ieee.org>
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?
Gary
On October 7, 2018 at 10:46 AM Nick Hall-Patch
<<mailto:n...@ieee.org>n...@ieee.org> 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 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>https://dreamcrafts.box.com/s/rhfksf381csgtohluxt3e97tjf79fshm
Gary
On October 7, 2018 at 8:10 AM Nick Hall-Patch
<<mailto:n...@ieee.org>n...@ieee.org> wrote:
At 06:22 2018-10-07, Bruce Portzer wrote:
Today's report will be very abbreviated, focusing on the really good
stuff. 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 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 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
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Victoria, BC
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Nick Hall-Patch
Victoria, BC
Canada
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