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Morse code is called the original digital mode. Radio telegraphy, designed for machine-to-machine communication is the direct on / off keying of a continuous wave carrier by Morse code symbols, often called amplitude-shift keying or ASK, may be considered to be an amplitude modulated mode of communications, and is rightfully considered the first digital data mode.
An amateur radio net, or simply ham net, is an "on-the-air" gathering of amateur radio operators.Most nets convene on a regular schedule and specific frequency, and are organized for a particular purpose, such as relaying messages, discussing a common topic of interest, in severe weather (for example, during a Skywarn activation), emergencies, or simply as a regular gathering of friends for ...
Dong Hoi Airport covers 173 ha, has one concrete paved runway (2,400 m x 45 m), ranked 4D according to ICAO, a two-story 4282-square-meter terminal, 15,000-square-meter apron for 2 Airbus A320 and Airbus A321s or equivalent, an air traffic control tower and six check-in counters and security equipment. The airport is capable of handling medium ...
Reporting networks such as PSK Reporter allow researchers in near real time to evaluate space weather conditions, particularly changes in the earth's ionosphere. [14] [15] There are multiple examples of PSK Reporter being used to aid researchers as well as aiding in the prediction and understand of radio propagation.
AREDN – Amateur Radio Emergency Data Network: This project picks up where Broadband-Hamnet leaves off and advances the Open Source software to widely available commercial devices and expands the technology beyond 2.4 GHz to the 900 MHz, 3.4 GHz, and 5.7 GHz ham bands. Enabling Innovative Small Cell Use In 3.5 GHZ Band NPRM & Order
Notable DX-peditions Year Location [Nb 1] Call sign Information References 2023 Swains Island: W8S 28th most wanted DXCC location [3] [4]2023 Sable Island: CY0S
Belligerents United States South Vietnam Kingdom of Laos: Viet Cong North Vietnam Pathet Lao: Commanders and leaders; William Westmoreland Rathvon M. Tompkins David E. Lownds: Võ Nguyên Giáp
The Maidenhead Locator System (a.k.a. QTH Locator and IARU Locator) is a geocode system used by amateur radio operators to succinctly describe their geographic coordinates, which replaced the deprecated QRA locator, which was limited to European contacts. [1]