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Radio Propagation


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D-Region Absorption
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Created by PA4RM

A titan of Amateur Radio, past ARRL Chief Technology Officer Paul L. Rinaldo, W4RI, of Burke, Virginia, died on November 29 after a period of failing health. An ARRL Life Member, Rinaldo was 88.

“This is really sad news,” ARRL President Rick Roderick, K5UR, remarked upon learning of Rinaldo’s passing. “I worked with Paul on a number of things, and he amazed me with his knowledge and the differen...

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