Seventy-five years ago today, the April 26, 1943 issue of Broadcasting carried this ad for South Dakota blowtorch WNAX in Yankton. As the ad noted, the the station’s tower stood 927 feet, then the highest in the country.

Due to the area’s good ground conductivity and the station’s low spot on the dial, the station still has the second largest daytime coverage area in the nation, putting a respectable daytime signal into Minneapolis/St. Paul, Fargo, Kansas City, Omaha, and Des Moines.  The station’s current tower stands 911 feet, and is also accompanied by two other towers used for the station’s nighttime pattern.

The station’s transmitter building shown here still stands.  The studio in Yankton was destroyed by fire in 1983 and rebuilt outside of town.