“We moved to 7170, and they jam the frequency there,” he says. A few hours after the protest broke out on the 11th, ham Alex Valladares (W7HU) says he was speaking with a Cuban operator on 7.130 megahertz in the 40-meter band, when their conversation was suddenly overwhelmed with interference. But these new mystery signals appeared to be intentionally targeting amateur radio transmissions. Other operators in South America, Africa, and Europe also reported hearing the signal, and triangulation software that anyone with a web browser can try placed the source of the signals as emanating from Cuba.Ĭuba has a long history of interfering with broadcast signals, with several commercial radio stations in Florida allowed to operate at higher than normal power levels to combat jamming. Florida operators reported the signals were loudest there, enough to make communication with hams in Cuba impossible. Amateur radio operators in the United States found that suddenly parts of the popular 40-meter band were being swamped with grating signals. Cuba Jamming Ham Radio? Listen For Yourself (IEEE Spectrum)Ī public SDR network triangulates the island as the source of mystery signalsĪs anti-government protests spilled onto the streets in Cuba on July 11, something strange was happening on the airwaves. Featuring computer engineer Andrus Aaslaid, historian Maris Goldmanis, and documentary photographer Lewis Bush. And one particular Russian station may have an even more sinister purpose. Though concrete evidence is hard to come by, the general consensus is that these coded messages are meant for undercover agents operating abroad. Since World War I, countries around the world have been broadcasting mysterious numerical messages via shortwave radio. This episode was written and produced by Olivia Rosenman. The Buzzer (Twenty Thousand Hertz podcast) Many thanks to SWLing Post contributors Paul, David Goren, Pete Polanyk, Ulis Fleming, Troy Riedel, Tracy Wood, Dan Robinson, and Kris Partridge for the following tips: To that end: Welcome to the SWLing Post’s Radio Waves, a collection of links to interesting stories making waves in the world of radio. Radio Waves: Stories Making Waves in the World of Radioīecause I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest SWLing Post readers.
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