For those interested, the following is from a
Facebook post by Chris Kadlec (located near the
border with North Korea) regarding the operation
of MWÂ jammers on the south side of the border.
73, Gary DeBock (in Puyallup, WA, USA)
Â
From Chris:
Â
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.
Â
Kaesong 810
beaglebass.com
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