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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: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 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: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 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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Nick Hall-Patch
Victoria, BC
Canada

Nick Hall-Patch
Victoria, BC
Canada
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