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Radio Propagation


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D-Region Absorption
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Created by PA4RM

Edward E. “Ed” Wetherhold, W3NQN, of Annapolis, Maryland, died on July 9. He was 93.

Licensed in 1947, Wetherhold was an electrical engineer who served in the US Air Force Reserve before spending 30 years at the Annapolis Signal Analysis Center of Alliant Techsystems (formerly the defense division of Honeywell).

Wetherhold was best known within the amateur radio community for designing and manufa...

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