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Radio Propagation


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D-Region Absorption
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Created by PA4RM

ARRL is inviting nominations for awards that recognize educational and technological pursuits in amateur radio. Nominations are also open for the League’s premier award to honor a young licensee.

  • The Hiram Percy Maxim Award recognizes a radio amateur and ARRL member younger than age 21, whose accomplishments and contributions are of the most exemplary nature within the framework of amateur radi...

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