LU6AES

Extraño poder escuchar la frecuencia policial local.

Qué lindo ver como sube la actividad en V y U fruto de la propagación veraniega. Se escucha mucho mas gente en directo y vía repetidora apenas con la antena de goma del Handy.

Qué maravilla cómo llega CX7OV desde Tacuarembó con su hilo largo. Acá el Handy tiene apenas un chicote de 1 metro de largo y está a nivel del piso. No sé si tenga cuenta por estos lados.

Es nula la actividad local en 10 metros FM. Capaz crece algo con el auge de los nuevos handys chinos. Igual en 6 metros. Se tendrían que poder hacer buenos contactos en cualquiera de las dos bandas con baja potencia.

Mucho de radio en este corto de Ciencia Ficción. youtu.be/wnMqT8QbvaM?si…

@LU8MIL Ok, muy buen dato viniendo de vos. Estoy muy entretenido descubriendo todo lo que tiene. Comparado en líneas generales con los de su procedencia parece estar muy bien.

@lu6aes Lindo bichito para regalado esta excelente. Actualiza el software

Me regalaron uno de estos. Al principio pensé "qué cosa por qué no preguntan antes". Después me empezó a llamar la atención y ahora me estoy entusiasmando. En unos días sabré si me gusta y vale la pena o no.

@lakousky Jaa, si!, me sorprendió pero también es cierto que venía instalando el asunto como quien no quiere la cosa 😎

@lu6aes ¡Un espectáculo! 👏 Eso sí que es un regalo 🎁

Todo bien con el FT8 y demás yerbas pero es medio triste ruletear todas las bandas y escuchar la señal clásica de esos modos pero casi nada de fonía.

@ColossiPy3du Coincido plenamente. Algo de eso hay seguro. Veremos qué pasa cuando lleguemos al supuesto pico del actual ciclo solar.

@lu6aes Creo que las condiciones desfavorables actuales se deben a la mala calidad de los productos derivados de los avances tecnológicos. El espectro radioeléctrico también se encuentra en una emergencia "climática", ¡pero también somos minoría!

Hace años, en el último ciclo solar favorable, pude escuchar taxis de centro américa cerca de la banda de 6 metros y lo más insólito, aviones de combate británicos en Malvinas en pleno ejercicio militar también cerca de los 50 mhz.

@cqcqcqdx Eagles!!

This Guy 👍

@StaticVoyager Incredible openning! I remember one time a huge sporadic witch let me watch a vhf channel from Santiago de Chile many miles away from my qth with The Andes mountain change in between us. Its like magic.

Analog TV E-skip now on channel 3 from Cuba 🇨🇺. That’s 1300 miles from my location in Ohio!

The Poulsen Arc Transmitter was the first major transceiver technology to debut after the spark-gap transmitter, marking a significant advancement in radio communication. Introduced around 1903 by Danish engineer Valdemar Poulsen, it began to replace spark-gap transmitters in the early 1900s due to its ability to produce continuous waves (CW) rather than the damped waves of spark-gap systems. This allowed for clearer, longer-range communication and paved the way for audio transmission, unlike spark-gap transmitters, which were limited to Morse code.Why the Poulsen Arc Transmitter. Historical Context: Spark-gap transmitters, pioneered by Heinrich Hertz in 1887 and commercialized by Guglielmo Marconi around 1896, dominated wireless telegraphy until World War I. They generated noisy, wide-bandwidth signals, causing interference and limiting efficiency. By the early 1900s, the need for more reliable and versatile systems led to alternatives like the Poulsen Arc.Technology: The Poulsen Arc used a continuous electric arc in a magnetic field, often in a hydrogen or hydrocarbon atmosphere, to generate stable high-frequency oscillations. This was a leap over spark-gap’s pulsed, damped waves, enabling narrower bandwidths and less interference.Adoption: By 1909, Poulsen Arc transmitters were used in commercial and naval stations, with ranges up to 4,000 miles by 1912. They were preferred for their simpler design compared to later vacuum tube systems and because the carrier stopped when the telegraph key was released, allowing operators to listen for replies.Comparison to Other Early TechnologiesAlexanderson Alternator: Developed around 1906 by Ernst Alexanderson, this high-speed alternator was another early continuous-wave transmitter. It was used for long-distance communication but was complex and bulky, making the Poulsen Arc more practical for many applications until vacuum tubes took over. Vacuum Tube Transmitters: Introduced around 1914–1916, vacuum tube technology (e.g., triodes) became dominant after World War I, offering even greater efficiency, audio transmission, and compact designs. They made both spark-gap and arc transmitters obsolete by the 1920s. Why Not Vacuum Tubes First?: While vacuum tubes were theorized earlier (e.g., Lee de Forest’s Audion in 1906), practical high-power tube-based transceivers weren’t widely available until after the Poulsen Arc had established itself. The arc was a bridge technology, filling the gap between spark-gap and tube eras. Spectacular Aspects Innovation: The Poulsen Arc was a game-changer, enabling reliable long-distance communication, including early transatlantic links, without the interference issues of spark-gap systems. Simplicity: Its design was mechanically simpler than alternators and didn’t require the delicate vacuum tubes of later systems, making it rugged for naval and commercial use.Legacy: It laid the groundwork for modern radio by proving continuous waves were viable, influencing the development of AM radio and beyond. Why Not Spark-Gap Successors? While improved spark-gap designs (e.g., quenched-gap by Max Wien in 1906, rotary spark gaps on the Titanic in 1912) extended the spark era, they were still spark-based and didn’t fundamentally change the damped-wave limitation. The Poulsen Arc was the first to break this barrier, making it the clear successor. #radio #hamradio #hamradioshack #wireless #marconi #Poulsen

@m0jfp I think its beautifull, a very good rig and in very good shape. Love to have one.

What do you think of this lovely old radio ?? vm.tiktok.com/ZNd69u76N/