Re: [IRCA] Jammer? on 1550?

["W. Curt Deegan" <WWWR@xxxxxxxxxxxxx>]

Bill, just a bit more on the 1550 Cuban jammer you reported hearing.

It was on 5 September, 2006, I first noted what I call the Whooper 
jammer on 1550, messing with WRHC Coral Gables and their Spanish 
format.  I have been logging this jamming activity since then, which 
is continuous as far as I can tell.

The "Whooper" should not be confused with the "Wobbler".  The Whooper 
is an audio whooping sound impressed on a steady carrier.  The 
Wobbler is a fluctuating carrier producing audio through interaction with
other carriers.  Also as mentioned, the Wobbler is sporadic while the 
Whooper jammer is continuous; though fading may mask the 
continuousness of the Whooper.  And finally, the Whooper appears only 
on 1550 while the Wobbler has, over time, been heard on many 
different frequencies and Cuban broadcast stations.

These distinctions are probably difficult to discern at a 
distance.  From here, with regular monitoring and watching the two 
signal types on spectrogram software, the differences between them 
are apparent.

 From my vantage point I can not tell how affective the Whooper is at 
jamming reception in Cuba of the targeted US station, its clear 
intent.  That it can easily be heard over and under WRHC from sunset 
through the night, and since it has been maintained all this time, 
would suggest it must be achieving some success.  As Dr.Z. noted, his 
DFing places the origin of the Whooper in the vicinity of Havana, so 
at least that potential WRHC audience would be impacted.

The Wobbler on the other hand, originates on Cuban broadcast 
stations, rather than as a transmission targeting US stations, and 
therefore is unlikely to be intentional jamming.  It certainly must 
be annoying though, to those trying to listen to the infected Cuban 
stations, and occasionally to listeners not in Cuba, of incidentally 
affected US stations.

Curt
-------
W. Curt Deegan
Boca Raton, (southeast) Florida
http://ScooterHound.com/WWWR/wobbler


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