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  • RF Power Amplifiers - ARRL

    The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources. Learn More

  • Circuit Construction - ARRL

    The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources. Learn More

  • Transatlantic - ARRL

    The early 1920s saw the dawn of international Amateur Radio. [Photo: cover of January 1922 QST magazine.] ARRL, RSGB Joint Events to Celebrate Centenary of Ham ... Learn More

  • Track and Solve Electrical Interference - ARRL

    The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources. Learn More

  • RF Exposure - ARRL

    The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources. Learn More

  • List all Products - ARRL

    The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources. Learn More

  • ARRL Handbook 2022

    The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources. Learn More

  • Arduino - ARRL

    The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources. Learn More

  • 2023 Handbook Reference - ARRL

    The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources. Learn More

  • RF Safety (excerpted for ARRL Handbook, 100th Edition (2023)

    May 2, 2023 ... Thus, amateur ra- dio makes use of non-ionizing radiation that is thousands or millions of times below the frequency that would cause it to ... Learn More

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