The author is vice president and general manager of Bryan Broadcasting in College Station, Texas, and was an early proponent of AM revitalization and the migration to FM translators. On March 25, Bryan petitioned the FCC to initiate a proceeding to authorize the MA3 all-digital mode of HD Radio for any AM station that chooses to do so.
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https://www.radioworld.com/columns-and-views/guest-commentaries/all-digital-am-breaking-new-ground
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https://www.radioworld.com/columns-and-views/guest-commentaries/all-digital-am-breaking-new-ground