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<span style="color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;">Amigos,</span><br>
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A revista CQ americana de setembro/2021 traz um artigo de 4 páginas do nosso colega Martin Butera, PT2ZDX/LU9EFO, sobre as interferências na banda de 40 metros atribuídas ao governo cubano para impedir as comunicações de radioamadores durante os dias de protesto
contra o regime e a falta de gêneros.</div>
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Abaixo copiei o início do artigo.</div>
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Parabéns ao Martin, pois é bastante difícil uma revista como a CQ abrir espaço para um artigo com tantas contribuições que recebe de todo o mundo.</div>
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Os artigos do Martin tem sido publicados em diversos períódicos virtuais e também em papel, como a Radio Kurier, da Alemanha, que na edição de abril/21 publicou como matéria de capa um artigo (5 páginas) sobre a Radio Nacional da Amazonia e na edição de junho/21
matéria (4 páginas) sobre a Rádio Guarujá. </div>
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73</div>
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Orlando .'. PT2OP</div>
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Is Cuba Jamming Radio Amateurs?<br>
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Cuba is apparently blocking amateur radio frequencies to stop communication inside and from outside of the island nation in the face of political turmoil. </div>
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Not only is internet access sporadic, but now there is also intentional interference on the 40-meter amateur radio band and it appears to be coming from Cuba. </div>
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Cuban radio operators communicate regularly with hams in Florida and other areas with large Cuban populations. But as anti-government protests swept through the streets of Cuba in July, something strange was happening on the airwaves. </div>
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Radio amateurs in the United States discovered that parts of the popular 40-meter bandwere suddenly being inundated with interference. Hams in Florida reported that the signals were stronger there, enough to make communication with radio amateurs in Cuba impossible. </div>
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Many Cuban radio amateurs have 40-meter radios that were built many years ago, since the vast majority do not have funds to buy commercial equipment. In addition, the rebound of propagation on the 40-meter band facilitates access to areas of the United States
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These mysterious signals lasted for several days, and they could be heard not only in the United States, but also in some regions of Western Europe such as the United Kingdom, France, and Spain. Here in South America, in the city of Brasilia Distrito Federal
(capital of Brazil), where I currently live, I was able to capture the powerful “jamming” signals. The word “jamming,” as most radio amateurs and listeners use the term, describes the deliberate use of radio noise or Have you noticed an unusual amount of QRM
on 40 meters this summer? As the author — a South American journalist and ham — explains in this analysis and commentary, many hams believe it is the result of political unrest in Cuba spilling over into the ham bands. Is Cuba Jamming Radio Amateurs? BY MARTIN
BUTERA<br>
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