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Radio Propagation


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D-Region Absorption
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Created by PA4RM

Amateur Radio volunteers with the Sonoma County, California, Auxiliary Communications Service (ACS) rallied to assist in February after heavy rain led to flooding in the region. San Francisco Section Manager Bill Hillendahl, KH6GJV, told ARRL that while no actual communication emergencies occurred during the weather event, Sonoma County ACS volunteers provided “needed eyes” and were available i...

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