Developed in the 1830s and 1840s by Samuel Morse (1791-1872) and other inventors, the telegraph revolutionized long-distance communication. It worked by transmitting electrical signals over a wire laid between stations. In addition to helping invent the telegraph, Samuel Morse developed a code (bearing his name) that assigned a set of dots and dashes to each letter of the English alphabet and allowed for the simple transmission of complex messages across telegraph lines. In 1844, Morse sent his first telegraph message, from Washington, D.C., to Baltimore, Maryland; by 1866, a telegraph line had been laid across the Atlantic Ocean from the U.S. to Europe. Although the telegraph had fallen out of widespread use by the start of the 21st century, replaced by the telephone, fax machine and Internet, it laid the groundwork for the communications revolution that led to those later innovations.
Small multifunctional, digital, very compact amateur radio station for the radio operation at home, on the way or in the emergency radio. For the digi... Read more
Technical Specifications 1 MHz to 1000 MHz. Bandwidth 160 kHz. Modulation types AM, WFM, NFM, LSB, USB. Powered by one Li-ion cell. Consumption up to... Read more
HRD Software is proud to serve over 30,000 ham radio customers in 136 countries. Thank you to our customers in Afghanistan, Anguilla, Argentina, Austr... Read more
IC-9700 Thank you Hayden H. – VK7HH for sharing his video, and be sure to follow him on his Youtube channel. For more information on the update:... Read more
New firmware for ICOM, D-STAR compatible handy device and 6 mobile devices will be released simultaneously
On November 6, the new firmware was released on the following six models (the version name of the released firmware in parentheses). In addition, new... Read more