[IRCA] From Chris Kadlec-- South Korean Jammers

[d1028gary@xxxxxxxxxxx]

For those interested, the following is from a Facebook post by Chris Kadlec (located near the border with North Korea) regarding the operation of MWÂjammers on the south side of the border. 
73, Gary DeBock (in Puyallup, WA, USA) 
 
From Chris: 
 


The hazards of DXing AM radio here in Korea include situations like this: seemingly low-powered AM transmitters not located on any tall sticks but instead disguised elsewhere and jamming signals. Jammers that are 70dBu in one spot but practically gone a few miles down the road. Signals that jam only a specific signal on a frequency with a 30-40dBu generated hum that can't be tracked to anywhere and is never more powerful than that despite always being atop the target signal ( ... these are getting on my last freaking nerve!!) but leave the other signals on a frequency alone. Other miscellaneous unidentifiable weirdness that makes me wonder if I'm actually even hearing what I think I'm hearing. 


Here's local 50kw 810 Kaesong, North Korea a few moments after the TOH at 1100 Pyongyang time (1130 Korea time) Saturday morning. While the tower is 9 miles away, it can be seen in clear sight even with the smog (it's a skyscraper in itself) from the recording location. Despite this, the signal is still destroyed by some type of generated interference, perhaps the silent jammer that can be heard in the metro area 20 miles away. How the Kaesong signal can't overcome this in direct line of sight is just beyond me. They don't have the best audio (better than 1053, which sounds like a 10-year old was playing engineer), but there is no way this is their unhampered signal. Despite this, it's 65dBu -- a silent jammer or else Kaesong itself, I have no idea -- recorded at the North Korean customs checkpoint. 

 
Kaesong 810 

beaglebass.com 

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