Why do some radio stations start with a K and some with a W?
1) “In the United States, broadcast stations have call signs between three and six characters in length, though the minimum length for new stations is four letters. An additional suffix may also be added, indicating a specific broadcast service type. Full-power stations receive four-letter call signs, while broadcast translator stations usually receive call signs with five or six characters, including two or three numbers. Generally, call signs begin with K west of the Mississippi River, and W to the east.” “New broadcasting stations are assigned call signs beginning with K, if they are west of the Mississippi River, and beginning with W if they are east of the river. Again, some early stations have been grandfathered, so there are four broadcasters with a K prefix east of the Mississippi, and a few dozen with a W on the west side. (There are more grandfathered W stations because the dividing line used to be two states farther west.) Some examples would be KDKA in Pittsburgh, Pennsylva
