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Many thanks to SWLing Post contributor, Chris Kadlec, who shares the following announcement about his Seoul AM Radio Listening Guide:
After a long 14 months of work, I’m happy to present the completed Seoul AM Radio Listening Guide, a three-hour documentary broadcast exploring the Seoul AM band one frequency at a time, plus a look at the radio war on the Korean peninsula accompanied by a 115-page guide.
In addition to radio broadcasts from across East Asia, the broadcast includes Korean noise jammers and AM, FM, shortwave, and television propaganda broadcasts from both the north and the south, additionally outlined in a 25-page broadcast transcript and 115-page informational guide. It also includes:
* A comprehensive list of 260 East Asian AM stations, including station names, tower locations, distance and direction from Seoul, parallel FM frequencies, broadcast hours, and station website links.
* A full bandscan of 235 regular nightly skywave signals as heard after the sun sets over Seoul.
* Daytime groundwave bandscans taken from eleven different locations in the Seoul metro area, along the North Korean border, beside the sea, and in Korea’s mountainous interior with background information about each location.
* A guide showing stations organized by their network affiliations in addition to privately-owned stations and networks. Alternatively, stations are also shown organized by country, region, and city.
* A chart showing signal strength for each bandscan – day and night – in bar graph format.
* A full colour-coded regional station map covering both skywave and groundwave signals.
* A view of some of Korea’s signal jammers as seen on an SDR (software-defined radio).
* Plus, a complete transcript of the three-hour audio broadcast with additional information on the featured audio clips as well as the songs featured in those clips.
– Chris Kadlec
Brilliant, Chris! I can only imagine the amount of time and effort you’ve put into this guide. Thank you!
Many thanks to SWLing Post contributor, Chris Kadlec, who has kindly (and upon my request) shared this interesting audio survey of Korean jammers and propaganda stations.
This is the final 45 minutes of my 3-hour – exactly 3 hours – broadcast of East Asia AM radio (skywave as heard from Seoul, frequency by frequency).
This includes jammers and propaganda stations on TV, FM, AM, and SW, though the AM band is covered in the first 2 hours. Some stations covered include Voice of the People, Echo of Hope, Jayuui Sori, Jayu FM, and Korean Central Television, as well as a look at the sounds of more than 30 Korean jammers one frequency at a time.
At the end of this month, the first 2 hrs. 15 min. will be released with a 60+ page guide, broadcast transcript with all song titles from the broadcast, and station map and all audio will be posted in a (somewhat) visible location. This project has taken 14 months to complete, so I truly hope you’ll take the time to become educated on the radio wars on the Korean peninsula. And if you’re too busy now, this part will be included in the full broadcast coming soon, so do not fret!
This is fascinating, Chris. Thank you for taking the time to share this with us–I imagine you’ve put in a number of days recording, editing, and narrating this fine spectrum survey. I’m also certain our community member, Mark Fahey, will love this (if he hasn’t already discovered your work)!
A little after midnight, early on the morning of July 15, as most of the Korean peninsula slept, were North Korean spies up late listening to the radio?
This was the big question after a strange sequence of numbers was read out on a North Korean radio station. It sounded a lot like the coded messages previously used to relay instructions to spies during the Cold War and perhaps that was the point.
The broadcast began at 12:45am, according to the Joong Ang Ilbo.
“From now on, I will give review work for the subject of mathematics under the curriculum of a remote education university for exploration agents of the 27th bureau.”
It continued, “On page 459, question number 35, on page 913, question number 55, on page 135, question number 86, on page 257, question number 2,” and so on. It lasted for 14 minutes.[…]
I’ve been offline and off-grid this week and have accumulated quite the backlog of email.
One news item that caught the attention of a large number of readers (thanks to all for the tips–!) was North Korean spy numbers. I’m very curious if any readers have logged and recorded this station–if so, please comment and consider sharing your recording!
The news was featured on at least two prominent news sites:
North Korea’s radio broadcast of string of mysterious numbers is possible code
Numbers read on state radio may be cold war-era method of sending coded messages to spies in South Korea – or an attempt to wage psychological warfare
North Korea’s state radio has recently broadcast strings of indecipherable numbers, according to officials in Seoul, in a possible resumption of a cold war-era method of sending coded messages to spies operating in South Korea.
A female announcer at the radio station read numbers for two minutes on 24 June and 14 minutes on Friday, according to Seoul’s unification ministry and national intelligence service (NIS). A copy of those comments provided by the ministry included phrases such as “No 35 on Page 459” and “No 55 on Page 913”.[…]
I have a very unique DX location, mere feet from the banks of the Yukon River in Alaska’s Central Interior Region. I have logged about 2 dozen of North Korea’s shortwave frequencies: 2850 kHz, 3250 kHz, 3320 kHz, 6070 kHz, 6100 kHz, 6170 kHz, 6400 kHz, 7220 kHz, 7580 kHz, 9425 kHz, 9435 kHz, 9445 kHz, 9650 kHz, 9665 kHz, 9730 kHz, 9875 kHz, 11735 kHz, 11910 kHz, 11935 kHz, 121015 kHz, 13650 kHz, 13760 kHz, 15105 kHz, 15180 kHz and 15245 kHz.
As it turns out, one user from here helped me plot it, the shortest path from North Korea to the Midwestern USA is a line from Pyongyang right through the small village I live in! So that answers why some of their are so glaringly strong for me. But, I can in general, hear them all day everyday at some level on a frequency if I look hard enough and try hard enough to pick them up.
What I find odd is their “dirty/white noise carrier.” Let me explain: it’s noisy and I’m pretty sure it’s self induced, on purpose. Listen to this clip from April 6, 2016 I posted on Soundcloud: https://goo.gl/JFJSss
Listen to that noise that starts about 6 seconds into this clip, disappears at about 26 seconds and then comes back at 39 seconds. It disappears at 44 seconds and comes back at about 48/49 seconds. It disappears at 52 seconds and comes back at 1 minute 1 seconds, then the interval tune starts, gets interrupted and restarts again from the beginning.
To me, when the interval signal dies out and the noise goes with it, it’s almost like this white/dirty noise carrier is caused by whatever they are using as a studio to transmitter link.
Now onto some other North Korea shortwave airchecks:
Here is an example of how wide their signals can be and what I have done to overcome interference. Here they are on 11865 kHz at 0946UTC on June 30th. I actually had to tune 2 kHz down to 11863 kHz to escape splatter from KNLS only 500 miles to my south. Audio here: https://goo.gl/iqKqoh
Now here’s a video from 0824UTC on May 5, 2016 showing the same programming on 9875 kHz, 11735 kHz and 13760. And if you look closely in the upper right hand corner of the video, you’ll see the signal level meter on my Tecsun PL880 showing how strong the signals on all 3 frequencies is. Video here: https://goo.gl/2MbE6Y
From March 26, 2016 at 1729UTC, this is KCBS Pyongyang signal on 3320 kHz that is reportedly only 5 kw. Video/audio here: https://goo.gl/2MbE6Y
Here is the English service on 15180 kHz from March 4, 2016 at 0350UTC. Pay close attention to the signal level meter and listen to the audio. This is strong! Audio and video here: https://goo.gl/s5xHYm
Here’s the English service of Voice of Korea on 9730, pretty decent signal with some female announcer talking at times. Audio here: https://goo.gl/W0mfs7
And on 11680 kHz, here’s KCBS Pyongyang, their state broadcaster and a voice we DX’ers are probably very familiar with. Someone that a friend lovingly calls, “Miss Frantic News Anchor”. Audio here: https://goo.gl/3cxu76 (Voice of Korea is their “international service” and KCBS is their “state service.”)
The Voice Of of Korea broadcasts in Chinese, Japanese, Korean, English, Spanish, French & German. Here is their Russian broadcast on 11735 kHz from 0828UTC on March 13, 2016. Audio here: https://goo.gl/6L7bnu
This is the Voice Of Korea on 13760 kHz signing on their Spanish service back on March 11, 2016 at 0430UTC. Audio here: https://goo.gl/TacYT0
A few tips when looking for The Voice Of Korea on your shortwave radios:
The service always begins within seconds of exactly 30 minutes after the hour, with the interval tone interspersed with an announcer/announcers saying “The Voice Of Korea” in whatever language service is about to sign on. At about 24 after, a sign off message lasting roughly 3 minutes is read in the language of whatever service was on. If the frequency you’re listening will switch to another service at 30 after the hour, the carrier goes dead/unmodulated for almost exactly 3 minutes before the next language comes on. And the process is repeated over again.
The English service sign off message is read by a male in very stilted, very proper english. It sounds as if the French, German and Spanish service is voiced by people who could very well be native speakers of those languages.
There is no carrier being turned off or fill music being used between different language services on Shortwave. And when they go dead air, the carrier will be extremely noisy and dirty, see my first audio clip in this post.
The KCBS Pyongyang broadcasts, which are their domestic/state broadcast go from top of hour to top of hour and I don’t believe there is any dead air in between.
One other thing, Pyongyang time (an “official” time zone) is UTC/GMT +8 hours 30 minutes and that’s the time zone KCBS Pyongyang followed, but it appears Voice of Korea follows the UTC+8 time zone deal. Voice of Korea doesn’t signify top of hour with any tones, but KCBS Pyongyang does, as I’ve heard them do it 3 times. Listen to the time tones on KCBS Pyongyang 3320 kHz here: https://goo.gl/2MbE6Y (They are at the very beginning of the clip)
North Korea’s shortwave signals, in my observations, have followed the time and frequency schedules they are supposed to. Some sites say the language service and frequency don’t match up, but that is likely more a problem with the VOK website than the shortwave broadcaster itself. If a frequency is listed as “on,” it’s going to be on unless a power outage or transmitter malfunction occurs.
I live in Galena, Alaska which is a village of 500 people about 300 miles west of Fairbanks and 300 miles east of Nome. I work as the Program Director for community radio station KIYU which celebrated it’s 30th birthday on July 4th, 2016. Having provided 30 years of true community service, now serving eight villages up and down the Yukon River.
On shortwave, I don’t log everything I hear–I try to keep my log to those stations that are rare, unique or interesting for one reason or another. Everything I do log gets recorded and you can find it on my YouTube Channel and sometimes on my SoundCloud channel.
My DX’ing gear includes the Tecsun PL880, an Emtech ZM2 Tuner, a 225 foot long wire and a Wellbrook ALA1530LNP. I record my catches using the VRP7 (Voice Recorder Pro 7) app on my Iphone. I can then email that mp3 to myself or convert it to a Youtube link for sharing with others.
Paul Walker is located in Galena, Alaska and is a regular contributor to the SWLing Post. Be sure to check out Paul’s YouTube channel and SoundCloud channel where everything he logs is recorded and posted. Click here to read his other contributions on the SWLing Post.
North Korea has been from the beginning of March continually signal jamming radio broadcasts on the shortwave frequency used by the South Korean non-profit broadcaster Unification Media Group (UMG). Given the present situation, in which North Korean residents might be influenced by outside information condemning the regime and explaining the purpose of the sanctions imposed by the United Nations, the regime has showed the will to block sources of outside information that might cause unrest.
The shortwave frequency […] in question, 7515 [kHz], has been actively jammed starting on March 1st making it extremely difficult for North Korean listeners to tune in. On the 15, UMG organization began using three receivers to test out reception at that and adjacent frequencies on a daily basis and was able to confirm that the exact signal is being jammed.
The blocking effort is being concentrated on the time period from 10pm- midnight. Specifically, from 10-11pm the jamming is very strong. The signal jamming is undetectable from midnight to 1am. The signal blocking became weaker at midnight on March 15, from which point onward the entire three hour broadcast was audible. Starting on the 17, UMG moved the frequency, but the jamming operators seemed not to notice because the interference continued on the old wavelength.
Many thanks to SWLing Post contributor, Chris Kadlec, who shares the following announcement about his Seoul AM Radio Listening Guide:http://www.beaglebass.com/dx/seoul/
