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Radio Propagation


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D-Region Absorption
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Created by PA4RM

The new 2019 ARRL Repeater Directory® is now shipping. It includes “crowdsourced” listings contributed by users, repeater owners, and volunteer frequency coordinators. This means more listings that are and updated more often. With 28,000 listings, the ARRL Repeater Directory® is the most complete printed directory of on-the-air repeaters, covering repeater systems throughout the US and Canada.

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