On shortwave, Chinese jamming is a lot more sophisticated these days.  Gone are 
the days of loud rackets on shortwave caused by firedrake.  For quite awhile 
the Chinese have been merely ‘co-channeling’ with multiple transmitters and 
out-of-time [on purpose] transmissions to interfere with western broadcasts.  
We poor western international broadcasters have taken so much ‘stuff’ off the 
air though that the Chinese have surplus facilities and for the past few years 
have been jamming [co-channeling] English from VOA, BBC and others.  Years and 
years of official complaining have had no effect and even direct negotiations 
during the early 90’s while working towards a[nother] ‘most favored nation’ 
trade agreement led to naught when talks broke off immediately upon Clinton 
signing the MFN agreement.

When we ‘test’ to see how serious the Chinese are about jamming a particular 
frequency used for Mandarin or Tibetan by moving the new frequency is found and 
jammed within 4 minutes.  That’s one helluva of a monitoring network and rivals 
what the Russians could do in the depth of the cold war.

Beijing is also known to ‘go after’ some religious broadcasters and as Gary 
points out they are notoriously paranoid about any ‘movement’ that puts 
anything above ‘the State.’

—

> On Apr 24, 2015, at 5:38 AM, Chuck Hutton <[email protected]> wrote:
> 
> Very aware of that Chinese station, Gary. But "jamming" has a different 
> context a la 1053 or 1080. 
> Chuck
> 
>> Date: Fri, 24 Apr 2015 07:08:10 +0000
>> From: [email protected]
>> To: [email protected]
>> Subject: Re: [IRCA] TP 23 Apr Victoria version
>> 
>> 
>> Mike, Chuck, Nick and All, 
>> 
>> A powerful new Chinese station showed up on 1566 kHz during the week of 
>> April 8th, noted first of all by Japanese DXers (Hiroyuki Okamura and 
>> others). Mauno Ritola also heard the 1566 Chinese signal via a remote 
>> Perseus receiver in Japan, and thought that the new Chinese station's power 
>> should at least be 100 kW. By coincidence, I was in Ocean Shores, WA during 
>> that week for a 2 day trip, and noticed the new Chinese station interfering 
>> with HLAZ's Japanese service signal at times 
>> http://www.mediafire.com/listen/8bdpotl5ib1b3px/1566-HLAZ-UnID-mix-1314z040915CCSW.MP3
>>    
>> 
>> As for the identity of the powerful new Chinese station and the bizarre 
>> choice of 1566 kHz as its frequency (which is one of the most "occupied" 
>> frequencies in east Asia, with HLAZ's 250 kW transmitter), there are 
>> differences of opinion. HLAZ broadcasts Chinese Christian programs in 
>> Mandarin to China, which the Beijing government probably doesn't feel very 
>> happy about. 
>> 
>> 73, Gary DeBock (in Puyallup, WA, USA) 
>> 
>> 
>> 
>> ----- Original Message -----
>> 
>> From: "Mike Sanburn" <[email protected]> 
>> To: "Mailing list for the International Radio Club of America" 
>> <[email protected]> 
>> Sent: Thursday, April 23, 2015 11:05:36 PM 
>> Subject: Re: [IRCA] TP 23 Apr Victoria version 
>> 
>> Thanks---North Korea would make more sense. 
>> 
>>> From: [email protected] 
>>> To: [email protected] 
>>> Date: Fri, 24 Apr 2015 05:58:16 +0000 
>>> Subject: Re: [IRCA] TP 23 Apr Victoria version 
>>> 
>>> There's no jamming station on 1566 that I know of. China does not jam South 
>>> Korea at all. The jamming is confined to North versus South and South 
>>> versus North. 
>>> Chuck 
>>> 
>>>> From: [email protected] 
>>>> To: [email protected] 
>>>> Date: Thu, 23 Apr 2015 22:43:29 -0700 
>>>> Subject: Re: [IRCA] TP 23 Apr Victoria version 
>>>> 
>>>> Any sign of Chinese jamming station or does that appear to be 
>>>> intermittent??  ms 
>>>> 
>>>>> Date: Fri, 24 Apr 2015 05:39:34 +0000 
>>>>> To: [email protected] 
>>>>> From: [email protected] 
>>>>> Subject: [IRCA]   TP 23 Apr Victoria version 
>>>>> 
>>>>> Pretty much the HLAZ show here this morning. 
>>>>> 
>>>>> pretty darn good audio (all of it understandable by a native speaker, 
>>>>> at least briefly): 
>>>>> 
>>>>> no, good grief no. 
>>>>> 
>>>>> 
>>>>> Reasonable audio  at  times during the period (much of it 
>>>>> understandable by a native speaker, though often battling w/splash or 
>>>>> noise): 
>>>>> 
>>>>> 1566 HLAZ Japanese program sign on 1230 to 1231UT with mentions of 
>>>>> "FEBC", "kiloHertz" (said after Japanese numbers, presumably 1566), 
>>>>> "HLA Zeto" and "nihongo hoso" by man.   Weaker audio up to past 
>>>>> 1250UT, with organ music close to this strength at 1247UT 
>>>>> 
>>>>> 
>>>>> not so reasonable audio, occasional words or phrases in splash or 
>>>>> noise could be understood by a native speaker: 
>>>>> 
>>>>> the above, passing through 
>>>>> 
>>>>> 
>>>>> Burbles in the splatter and noise (if lucky, language might be 
>>>>> guessed at by cadence of talk, or parallel established by changes in 
>>>>> talk or music) 
>>>>> 
>>>>> the above, passing through 
>>>>> 
>>>>> 
>>>>> 
>>>>> Strongish het, no or "near imaginary" audio (either undermodulated or 
>>>>> ravaged by splatter) 
>>>>> 
>>>>> 1287 1494 1512 with SAH 
>>>>> 
>>>>> 
>>>>> 
>>>>> best wishes, 
>>>>> 
>>>>> Nick 
>>>>> 
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