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Author Topic: V28 frequency change  (Read 2398 times)

Offline bclman

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V28 frequency change
« on: December 08, 2015, 2001 UTC »
V28 frequency change
2015 Dec 8
3052kHz AM (13:29~13:38 UTC) gong-doo-san, weak signal
3689kHz AM (13:28~13:40 UTC) rak-doo-san, audio quality was very bad
QTH: Anyang, South Korea
Rx: G35DDCi excalibur ultra
Ant: 303WA-2

https://www.youtube.com/watch?v=04yomIQ-ZwE

Offline Token

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Re: V28 frequency change
« Reply #1 on: December 09, 2015, 1904 UTC »
There appear to be some changes in the V28 patterns over the past few days.  It is possible these activities have been occurring in the past and are just now being noticed.

For example, this morning, Dec 9, 2105, both 3277 kHz and 3689 kHz were used.  The "normal" V28 came up at 1330 UTC on 3277 kHz, it continued until about 1340 UTC.  At the same time, 1330 UTC, 3689 kHz became active with some type of voice traffic, but not the normal V28 format.  3689 kHz ended quite early but the carrier stayed on air, possibly this was just test audio at 1330 UTC.  And then, at 1340 UTC and after 3277 kHz was complete, the voice form 3277 kHz shifted to the transmission on 3689 kHz, and sent a brief message.  Nothing was seen on 3052 during this mornings events.

Additionally, over the past few days the message on 3277 kHz has been shortened, so that only about 5 minutes of important audio was sent, vs the 10 minutes in prior use.

When numbers stations are new it is not uncommon for them to change format until they settle into a format they can use for all occasions.  It is possible that V28 is still I the early days of its operation and details are still being polished as needed.

T!
T!
Mojave Desert, California USA

Offline bclman

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Re: V28 frequency change
« Reply #2 on: December 09, 2015, 2321 UTC »
3047kHz was received on Dec.9.2015 in South Korea.

https://youtu.be/gFuptdGtCdo

Offline sat_dxer

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Re: V28 frequency change
« Reply #3 on: December 10, 2015, 0003 UTC »
interesting laugh 7" in
Most times & frequencies posted are only an approximation.

Offline Token

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Re: V28 frequency change
« Reply #4 on: December 11, 2015, 0128 UTC »
bclman, I assume that is your recording on the Excalibur Ultra?  Can you check 3277 kHz and 3689 kHz during the 1330 to 1435 UTC time?  I think you will find that on Dec 9 both of those frequencies were active also.  I did not see 3047 kHz myself, but after I checked 3052 kHz (freq used on Dec 8) I never really looked below 3100 kHz again.

Also, if that is your G35, I see you are using a 16 MHz wide DDC recording, how long are you keeping the recordings?  Since 16 MHz gives almost 9 GB per minute in file size I find I do not keep those wide ones very long.  I initially record mine (from the G35, the G33, and the G31) to a 1 TB SSD, and then the files I want to keep go to a 40 TB server I built for SDR recordings.

T!
T!
Mojave Desert, California USA

Offline bclman

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Re: V28 frequency change
« Reply #5 on: December 11, 2015, 0224 UTC »
I bought my G35 this year for chasing V24.
I have configured my 2 3TB hard disks with RAID0 mode.
In this system, I recorded a DDC file for 8 hours with 32MHz entire SW recording.
16 hours with 16MHz recording.

On Dec.9, I didn't record the DDC file until 1435 UTC.

Below are my recordings.

https://youtu.be/mSvGwZ069k4 (Dec.9, 3277kHz)
https://youtu.be/RfknBm81C30  (Dec.9, 3690kHz)

https://youtu.be/n5Iv3PtzjxQ (Dec10, 3049kHz)
https://youtu.be/hAdZokU-ibM (Dec10, 3277kHz)

Offline Token

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Re: V28 frequency change
« Reply #6 on: December 11, 2015, 1737 UTC »
Excellent, thank you.  I cannot receive V28 well here at all, it is Very weak in California.  I end up using remote receivers in Asia to monitor this station, so it is difficult for me to catch new activity on previously unused frequencies.

I have seen no new activity on V24 frequencies since the music loop for 36 hours.  Hopefully V24 will return to the air though.

T!
T!
Mojave Desert, California USA

 


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