Re: [IRCA] Alberta lack of TPs for 25 March 2017

[Volodya S <canswl@xxxxxxxxx>]

Thanks, Mauno and Chris.  Makes more sense, kind of!  No sign of the jammer
today.  73, Walt

On Sunday, March 26, 2017, Chris Kadlec <beaglebass@xxxxxxxxxxxxxx> wrote:

> That is indeed 1584 North Korea. And we still haven't the freaking
> foggiest idea what exactly they are jamming, though it wouldn't be the
> first time. The jammer is an older style analogue noise maker (as opposed
> to 819's digital jammer during their off-air hours, which isn't the norm)
> and it is turned off manually (which is the norm) just after 1am every
> morning.
>
> I believe they're attempting to jam Harbin, which happens to turn off
> around that time, but it doesn't account for the Korean programming on the
> much-wider more widespread 1476 network out of Harbin, with multiple
> repeaters that get out well into Seoul. The jammer is not especially strong
> in Seoul, but it's persistent and likely based in the Pyongyang suburbs
> with 972 and a few of the other weaker ones. It's either rather distant,
> such as in the northern border areas of North Korea (if jamming Harbin) or
> it has low power. I believe the first of the two if it's being heard
> overseas at all. It clocks in at 30dBu in Seoul, just above the noise level
> but strong enough that it's heard 100% of the time it's on-air and largely
> covers the two 1kw KBS signals in the south (of which I do not believe the
> North is targeting due to their low power and distance).
>
> http://www.beaglebass.com/dx/external/Jammer_1584_A.MP3 (sign-off)
> http://www.beaglebass.com/dx/external/Jammer_1584_B.MP3
> http://www.beaglebass.com/dx/external/Jammer_1584_C.MP3
>
> It can have some interesting patterns on the SDR as well:
>
> http://www.beaglebass.com/dx/external/Jammer_1584_SDR.jpg
>
> Naturally, this one along with all the jammers (new and old) and stations
> are in my own publication and audio documentary, making it hard to find an
> excuse to not know about it *wink*.
>
> -Chris Kadlec
> Seoul AM Radio Listening Guide
> http://www.beaglebass.com/dx/seoul
>
>
>
> Date: Sun, 26 Mar 2017 14:01:43 +0300
>> From: Mauno Ritola <Mauno.Ritola@xxxxxxxxxxxxxxx>
>> To: Mailing list for the International Radio Club of America
>> <irca@xxxxxxxxxxxxxxxx>
>> Subject: Re: [IRCA] Alberta lack of TPs for 25 March 2017
>>
>> I think the bubble jamming is from North Korea. Heard sometimes weak
>> also here in Finland.
>>
>> 73 from still snowy eastern Finland,
>>
>> Mauno
>>
>> 25.3.2017, 21:55, Volodya S kirjoitti:
>>
>>> Very nice Asian reception into Masset this morning. Highlight was 1584
>>> with
>>> bubble jamming. ? Iran, cochannel 100w NHK 1 often at good level. Not a
>>> peep from DU and a modest post LSR enhancement. Indonesia on 90 and 60
>>> meters exceptionally well heard. 73, from a sunny Queen Charlotte. Walt
>>>
>>>
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