Re: [IRCA] S. AZ TPs November 21--very poor

[Chris Kadlec <beaglebass@xxxxxxxxxxxxxx>]

Steve,

The 1566 jammer is out of Pyongyang. I believe itâs either broadcasting from the suburban towers near the airport (with the other big signals) or else more likely from the Anak tower site. Itâs my old local.

Here is a recording of 1566 locally from my neighbourhood in Seoul â the English & Korean is FEBC Jeju, the jammer is Pyongyang about 100 miles to my north, and the Chinese near the end of the clip is Yanbian //1053:

http://www.beaglebass.com/dx/external/2017_11/1566_Jeju_Pyongyang_Yanbian.MP3

1566 isnât really the most open frequency in Seoul. Itâs a pretty big mess aside from the hours that Jeju aims due north at the mainland, especially during the Russian programming block smack in the middle of the night. But thatâs skywave for you â you guys get Jeju in practically nightly across the globe but 300 miles away, itâs trashed. Same with 972, my 30-mile local. Henan regularly beat it up, especially in the late evening.

There are new jammers on 558 639 648 705 711 756 792 (x2) 864 and 1062. Technically, the 639 jammer started up about a year ago while the 648 followed soon after. Weâre not even sure who or what or why they are jamming some of these. There is nothing to jam on 639 and 648, at least not from Korea. It seems more likely they are jamming CNR-1. 705 is, well, thereâs nothing there either. 711 is a well-established 75 kHz-wide signal out of Haeju that is tough to shake. 792 Seoul is a crappy signal to start with but I guess it warrants double jamming. Theyâre known to jam in the metro Seoul area toward Haeju and in the central area near the plains in Pyonggang (north of Cheorwon). There are no Korean signals on 756. The sole signal on that frequency went off the air at the start of January 2016, meaning they are very uninformed as to happenings a few hours to their south.

The others are understandable (558 is KBS 2 R Daegu, 864 is KBS 1 R Gangneung, and 1062 is KBS 1 R Cheongju) along with the long-time big jammer on 1467 that is easily heard overseas to the south, the 972 jammer in Pyongyang, the video game jammer in the early morning hours on 819 during KCBSâ off hours (Paul used to pick that one up in Alaska), and the 1584 part-time jammer (vs. China more than likely) that is manually switched off between 1-1:30 every morning. 

-Chris Kadlec
Seoul AM Radio Listening Guide
http://www.beaglebass.com/dx/seoul/



Date: Tue, 21 Nov 2017 07:37:10 -0700
From: Steve Ratzlaff <ratzlaffsteve@xxxxxxxxx>
Subject: [IRCA] S. AZ TPs November 21--very poor

Only one station heard with audio this morning, 1566 South Korea, and 
that was only "very poor". A very weak jammer also heard on 1566 with 
steady low-pitched modulation around 30 Hz fundamental and harmonics. 
High band had a slight enhancement of poor hets just before and? 
continuing after sunrise. Sunrise 1358 utc.

1566 S Korea HLAZ 1342 utc very poor talk; 1348 utc very poor talk 
(after ant pattern switch), last heard 1415 utc.

1566 China? 1348 utc jammer with low-pitched steady modulation of a 
"buzzing" sound, fading up now and then to very poor level. I used my 7 
Hz narrow audio filter to find approx. 30 Hz fundamental audio with 
harmonics causing the buzzing modulation. Didn't Gary DeBock mention 
hearing a jammer some months back?

Steve AA7U

near Sahuarita, AZ

R75; FDM S2 recording; west DKAZ + FLG100 preamp
_______________________________________________
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