In 1942, during World War II, the American Radio Relay League (ARRL) published a special “Defense Edition” of the ARRL Handbook. This edition was tailored to support the war effort, providing valuable information and guidance to amateur radio operators involved in military and defense-related communications. The handbook included sections on radio technology, equipment construction, and operating procedures relevant to wartime needs. By equipping amateur radio enthusiasts with practical knowledge and skills, the ARRL aimed to bolster national security and civil defense. This special edition underscored the crucial role of amateur radio in supporting military operations and emergency communications during a time of global conflict.
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