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 _______________________________________________ IRCA mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
