1923

First transatlantic CW two-way contact

Collection of hourglasses representing amateur radio history

In November 1923, the first transatlantic two-way contact using continuous wave (CW) was successfully made between American amateur radio operators Fred Schnell (1MO) and John Reinartz (1XAL) and French operator Léon Deloy (8AB). This historic event marked a significant milestone in amateur radio communication, demonstrating the feasibility of long-distance radio contacts using Morse code on shortwave frequencies. The success of this transatlantic communication showcased the potential of amateur radio to bridge vast distances, inspiring further experimentation and innovation within the amateur radio community. It also highlighted the importance of international cooperation and friendship among radio enthusiasts worldwide.

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